FN Thomson Reuters Web of Science™ VR 1.0 PT S AU Engel, MA Aflaire, M AF Engel, Matthew A. Aflaire, Marc GP IEEE TI Analysis of simultaneous multiwavelength anomalous diffraction for phasing protein crystals SO 2007 IEEE 33RD ANNUAL NORTHEAST BIOENGINEERING CONFERENCE SE Annual IEEE Northeast Bioengineering Conference LA English DT Proceedings Paper CT IEEE 33rd Annual Northeast Bioengineering Conference CY MAR 10-11, 2007 CL Long Isl, NY SP IEEE, EMB, AIChE AB Macromolecular crystallography is a burgeoning field bridging the disciplines of biological chemistry, physics and material science. The diffraction of protein crystals is frequently required by pharmaceutical companies during the drug development process. Both intensity and phase of diffracted x-rays are required to solve a new crystal structure. Phases can be determined using the multiwavelength anomalous diffraction method (MAD). Simultaneous MAD (SMAD) has been proposed to significantly reduce the length of synchrotron data collection leading to faster structure determination. Analysis of MAD images collected at the peak and edge wavelengths reveal overlapping HKL reflections. C1 [Engel, Matthew A.] SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. [Aflaire, Marc] Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY 11973 USA. RP Engel, MA (reprint author), SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. FU Department of Energy [DE-AC02-98CH10866]; National Institute of Health/National Institute of General Medical Sciences [Y1 GM-0080-03] FX I would like to thank Dr. Marc Allaire and Dr. Lisa Miller for their confidence and encouragement. This work has been supported by the Department of Energy under contract #DE-AC02-98CH10866 and National Institute of Health/National Institute of General Medical Sciences agreement Y1 GM-0080-03. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0277-1063 BN 978-1-4244-1032-3 J9 NORTHEAST BIOENGIN C PY 2007 BP 146 EP + DI 10.1109/NEBC.2007.4413321 PG 2 WC Engineering, Biomedical; Engineering, Electrical & Electronic; Materials Science, Biomaterials; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Materials Science; Radiology, Nuclear Medicine & Medical Imaging GA BHP13 UT WOS:000255100600072 ER PT S AU Tully, M Luo, ZC Benveniste, H Yu, M Du, CW AF Tully, Melissa Luo, Zhongchi Benveniste, Helene Yu, Mei Du, Congwu GP IEEE TI Cocaine-induced cerebral hemodynamic and neuronal function changes in vivo measured by Laser Doppler Flowmetry SO 2007 IEEE 33RD ANNUAL NORTHEAST BIOENGINEERING CONFERENCE SE Annual IEEE Northeast Bioengineering Conference LA English DT Proceedings Paper CT IEEE 33rd Annual Northeast Bioengineering Conference CY MAR 10-11, 2007 CL Long Isl, NY SP IEEE, EMB, AIChE DE cocaine; LDF and cerebral blood flow ID FLOW AB In this study Laser Doppler Flowmetry (LDF) was used to characterize the effects of cocaine on the local cerebral blood flow (LCBF) in rat brains in vivo. Also, the comparison of LCBF transients (Delta LCBF(t)) elicited in the same animal in response to forepaw electrical stimulation was investigated before and after acute cocaine challenge to characterize the effects of the cocaine on the neural function. Our experimental results demonstrated that an acute cocaine administration (1mg/kg, i.v.) induced a increase of similar to 20-30% in LCBF immediately following the cocaine administration. The mean arterial blood pressure (MABP) also increased to 133 mm Hg from a baseline of approximately 91 rum Hg. Both LCBF and MABP increases were temporal, and recovered to baseline 10-12 min and 4-6 min post-injection of cocaine, respectively. However, ALCBF(t) signal elicited by forepaw stimulation was quenched until 40 min after cocaine injection. Our results elucidated the time course of cocaine's acute cerebrovascular and neurological effects, which might provide a better understanding of the etiology of cocaine-related stroke and transient ischemic attacks explored previously in the human studies. C1 [Tully, Melissa; Luo, Zhongchi] SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. [Luo, Zhongchi; Benveniste, Helene; Yu, Mei; Du, Congwu] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Tully, M (reprint author), SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0277-1063 BN 978-1-4244-1032-3 J9 NORTHEAST BIOENGIN C PY 2007 BP 156 EP 158 DI 10.1109/NEBC.2007.4413326 PG 3 WC Engineering, Biomedical; Engineering, Electrical & Electronic; Materials Science, Biomaterials; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Materials Science; Radiology, Nuclear Medicine & Medical Imaging GA BHP13 UT WOS:000255100600077 ER PT B AU Tran, TQ Boring, RL Joe, JC Griffith, CD AF Tran, Tuan Q. Boring, Ronald L. Joe, Jeffrey C. Griffith, Candice D. GP IEEE TI Extracting and converting quantitative data into human error probabilities SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB This paper discusses a proposed method using a combination of advanced statistical approaches (e.g., meta-analysis, regression, structural equation modeling) that will not only convert different empirical results into a common metric for scaling individual PSFs effects, but will also examine the complex interrelationships among PSFs. Furthermore, the paper discusses how the derived statistical estimates (i.e., effect sizes) can be mapped onto a HRA method (e.g. SPAR-H) to generate HEPs that can then be use in probabilistic risk assessment (PRA). The paper concludes with a discussion of the benefits of using. academic literature in assisting HRA analysts in generating sound HEN and HRA developers in validating current HRA models and formulating new HRA models. C1 [Tran, Tuan Q.; Boring, Ronald L.; Joe, Jeffrey C.] Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. [Griffith, Candice D.] Vanderbilt Univ, Dept Civil & Environm Engn, 221 Kirkland Hall, Nashville, TN 37235 USA. RP Tran, TQ (reprint author), Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. EM tuan.tran@inl.gov; ronald.boring@inl.gov; jeffrey.joe@inl.gov; candice.d.griffth@vanderbilt.edu NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 164 EP + DI 10.1109/HFPP.2007.4413200 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400034 ER PT B AU Boring, RL Griffith, CD Joe, JC AF Boring, Ronald L. Griffith, Candice D. Joe, Jeffrey C. GP IEEE TI The measure of human error: Direct and indirect performance shaping factors SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE ID SLEEP-DEPRIVATION; IMPAIRMENTS AB The goal of performance shaping factors (PSFs) is to provide measures to account for human performance. PSFs fall into two categories-direct and indirect measures of human performance. While some PSFs such as "time to complete a task" are directly measurable, other PSFs, such as "fitness for duty," can only be measured indirectly through other measures and PSFs, such as through fatigue measures. This paper explores the role of direct and indirect measures in human reliability analysis (HRA) and the implications that measurement theory has on analyses and applications using PSFs. The paper concludes with suggestions for maximizing the reliability and validity of PSFs. C1 [Boring, Ronald L.; Joe, Jeffrey C.] Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID USA. [Griffith, Candice D.] Vanderbilt Univ, Dept Civil & Environm Engn, 221 Kirkland Hall, Nashville, TN 37235 USA. RP Boring, RL (reprint author), Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID USA. EM ronald.boring@inl.org; candice.d.griffith@vanderbilt.edu; jeffrey.joe@inl.gov FU US Department of Energy(DOE) under DOE Idaho Operations [DE-AC07-05ID14517]; agency of the US Government. FX This work was supported by the US Department of Energy (DOE) under DOE Idaho Operations Contract DE-AC07-05ID14517. This article was prepared as an account of work sponsored by an agency of the US Government. The opinions expressed in this paper are those of the authors and not of an agency of the US Government. Neither the US Government nor any agency thereof, nor any employee, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for any third partys use, or the results of such use, of any information, apparatus, product, or process disclosed in this publication, or represents that its use by such third party would not infringe privately owned rights. NR 20 TC 8 Z9 8 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 170 EP + DI 10.1109/HFPP.2007.4413201 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400035 ER PT B AU Boring, RL Blackman, HS AF Boring, Ronald L. Blackman, Harold S. GP IEEE TI The origins of the SPAR-H method's performance shaping factor multipliers SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB The Standardized Plant Analysis Risk-Human Reliability Analysis (SPAR-H) method has proved to be a reliable, easy-to-use method for human reliability analysis. Calculation of human error probability (REP) rates is especially straightforward, starting with pre-defined nominal error rates for cognitive vs. action oriented tasks, and incorporating performance shaping factor (PSF) multipliers upon those nominal error rates. SPAR-H uses eight PSFs with multipliers typically corresponding to nominal, degraded, and severely degraded human performance for individual PSFs. Additionally, some PSFs feature multipliers to reflect enhanced performance. Although SPAR-H enjoys widespread use among industry and regulators, current source documents on SPAR-H such as NUREG/CR-6883 do not provide a clear account of the origin of these multipliers. The present paper redresses this shortcoming and documents the historic development of the SPAR-H PSF multipliers, from the initial use of nominal error rates, to the selection of the eight PSFs, to the mapping of multipliers to available data sources such as a Technique for Human Error Rate Prediction (THERP). Where error rates were not readily derived from THERP and other sources, expert judgment was used to extrapolate appropriate values. In documenting key background information on the multipliers, this paper provides a much needed cross-reference for human reliability practitioners and researchers of SPAR-H to validate analyses and research findings. C1 [Boring, Ronald L.; Blackman, Harold S.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Boring, RL (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 16 TC 6 Z9 6 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 177 EP 184 DI 10.1109/HFPP.2007.4413202 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400036 ER PT B AU Tran, TQ Feigh, KM Pritchett, AR AF Tran, Tuan Q. Feigh, Karen M. Pritchett, Amy R. GP IEEE TI Supporting multiple cognitive processing styles using tailored support systems SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB According to theories of cognitive processing style or cognitive control mode, human performance is more effective when an individual's cognitive state (e.g., intuition/scramble vs. deliberate/strategic) matches his/her ecological constraints or context (e.g., utilize intuition to strive for a "good-enough" response instead of deliberating for the "best" response under high time pressure). Illmapping between cognitive state and ecolgoical constraints are believed to lead to degraded task performance. Consequently, incorporating support systems which are designed to specifically address multiple cognitive and functional states e.g., high workload, stress, boredom, and initiate appropriate mitigation strategies (e.g., reduce information load) is essential to reduce plant risk. Utilizing the concept of Cognitive Control Models, this paper will discuss the importance of tailoring support systems to match an operator's cognitive state, and will further discuss the importance of these ecological constraints in selecting and implementing mitigation strategies for safe and effective system performance. An example from the nuclear power plant industry illustrating how a support system might be tailored to support different cognitive states is included. C1 [Tran, Tuan Q.] Idaho Natl Lab, Human Factors & I&C Dept, Idaho Falls, ID 83415 USA. [Feigh, Karen M.; Pritchett, Amy R.] Georgia Inst Technol, Cognit Engn Ctr, Atlanta, GA USA. RP Tran, TQ (reprint author), Idaho Natl Lab, Human Factors & I&C Dept, Idaho Falls, ID 83415 USA. EM tuan.tran@inl.gov; kfeigh@isye.gatech.edu; amy.pritchett@ae.gatech.edu NR 9 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 189 EP + DI 10.1109/HFPP.2007.4413204 PG 2 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400038 ER PT B AU Tran, TQ Gertman, DI Dudenhoeffer, DD Boring, RL Mecham, AR AF Tran, Tuan Q. Gertman, David I. Dudenhoeffer, Donald D. Boring, Ronald L. Mecham, Alan R. GP IEEE TI Cognitive virtualization: Combining cognitive models and virtual environments SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB 3D manikins are often used in visualizations to model human activity in complex settings. Manikins assist in developing understanding of the range, scope and timing of various human activities. They are applicable to a wide range of environments.. One such environment the nuclear power plant control room, is a setting where manikins can be used to simulate more precise ergonomic assessments of human work stations. Neat generation control rooms will pose numerous challenges for system designers. The manikin modeling approach by itself, however, is insufficient for dealing with the technical advancements and performance demands associated with proposed next generation control rooms. Uncertainty regarding effective staffing levels; and the potential for negative human performance consequences in the presence of advanced' automated systems (e.g., reduced vigilance, poor situation awareness, mistrust or blind faith in automation, higher information load and increased complexity) call for further research. One approach to managing design uncertainty is through complementary analysis that merges ergonomic manikin models with models of higher cognitive functions, such as attention, memory, decision-making, and problem-solving. This paper will discuss recent advancements in merging a theoretical-driven cognitive modeling framework within a 3D visualization modeling tool to conduct next generation control room human factors and ergonomic assessments. Though this discussion primary focuses on control room design, merging 3D visualization and cognitive modeling can be extended to various areas of focus such as training and scenario planning. C1 [Tran, Tuan Q.; Gertman, David I.; Dudenhoeffer, Donald D.; Boring, Ronald L.; Mecham, Alan R.] Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. RP Tran, TQ (reprint author), Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 195 EP 200 DI 10.1109/HFPP.2007.4413205 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400039 ER PT B AU Boring, R Whaley, A Hallbert, B Laumann, K Braarud, PO Bye, A Lois, E Chang, YHJ AF Boring, Ronald Whaley, April Hallbert, Bruce Laumann, Karin Braarud, Per Oivind Bye, Andreas Lois, Erasmia Chang, Yung Hsien James GP IEEE TI Capturing control room simulator data with the HERA system SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB The Human Event Repository and Analysis (HERA) system has been developed as a tool for classifying and recording human performance data extracted from primary data sources. This paper reviews the process of extracting data from simulator studies for use in HERA. Simulator studies pose unique data collection challenges, both in types and quality of data measures, but such studies are ideally suited to gather operator performance data, including the full spectrum of performance shaping factors used in a HERA analysis. This paper provides suggestions for obtaining relevant human performance data for a HERA analysis from a control room simulator study and for inputting those data in a format suitable for HERA. C1 [Boring, Ronald; Whaley, April; Hallbert, Bruce] Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID 83415 USA. [Boring, Ronald; Laumann, Karin; Braarud, Per Oivind; Bye, Andreas] Inst Energiteknikk, Ind Psychol Div, OECD Halden Reactor Project, Halden, Norway. [Lois, Erasmia; Chang, Yung Hsien James] US Nucl Regulatory Commiss, Off Nucl Regulatory Res, Washington, DC USA. RP Boring, R (reprint author), Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID 83415 USA. EM ronald.boring@inl.gov; april.whaley@inl.gov; bruce.hallbert@inl.gov; karin.laumann@hrp.no; per.oivind.braarud@hrp.no; andreas.bye@hrp.no; exl1@nrc.gov; yjcl@nrc.gov RI Hallbert, Bruce/B-5435-2017 OI Hallbert, Bruce/0000-0002-4133-7625 FU US Nuclear Regulatory Commission under US Department of Energy Idaho Operations [DE-AC07-05ID14517] FX This article was prepared as an account of work sponsored by an agency of the US Government. The opinions expressed in this paper are those of the authors and not of an agency of the US Government. Neither the US Government nor any agency thereof, nor any employee, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for any third partys use, or the results of such use, of any information, apparatus, product, or process disclosed in this publication, or represents that its use by such third party would not infringe privately owned rights. The work conducted by the first three authors was supported by the US Nuclear Regulatory Commission under US Department of Energy Idaho Operations Contract DE-AC07-05ID14517. NR 12 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 210 EP + DI 10.1109/HFPP.2007.4413208 PG 2 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400042 ER PT B AU Tran, TQ AF Tran, Tuan Q. GP IEEE TI Issues of mitigation strategies in augmented system for next generation control room SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE ID RECALL; SKILL; CHESS AB Past research on augmented systems has been predominately concerned with measuring and classifying an operator's functional states. Only recently has the field begun researching mitigation strategies. The purpose of this paper is to add further conceptual understanding to mitigation strategies. Based upon the decision making literature, we pose three issues that mitigation strategies need to resolve: the types of decision strategies an operator uses, the structure of the information that an operator processes, and finally, the cue or pattern of cues that the operator relies on in making decisions. These issues are important to ensure that mitigation strategies are congruent to operator's decision-making behaviors. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Tran, TQ (reprint author), Idaho Natl Lab, POB 1625,Mail Stop 3605, Idaho Falls, ID 83415 USA. NR 17 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 238 EP 242 DI 10.1109/HFPP.2007.4413212 PG 5 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400046 ER PT B AU Dang, VN Bye, A Lois, E Forester, J Kolaczkowski, AM Braarud, PO AF Dang, Vinh N. Bye, Andreas Lois, Erasmia Forester, John Kolaczkowski, Alan M. Braarud, Per Oivind GP IEEE TI An empirical study of HRA methods - Overall design and issues SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE ID COMMISSION; ERRORS AB A diversity of Human Reliability Analysis (BRA) methods are currently available to treat human performance in Probabilistic Risk Assessments (PRAs). This range of methods reflects traditional concerns with human-machine interfaces and with the basic feasibility of actions in PRA scenarios as well as the more recent attention paid to Errors of Commission and decisionmaking performance. Given the differences in the scope of the methods and their underlying models, there is a substantial interest in assessing HRA methods and ultimately in validating the approaches and models underlying these methods. A significant step in this direction is an international evaluation study of HRA methods, based on comparing the observed performance in simulator experiments with the outcomes predicted in HRA analyses. Its aim is to develop an empiricallybased understanding of the performance, strengths, and weaknesses of the methods. This paper presents the overall methodology for this initial assessment study. C1 [Dang, Vinh N.] Paul Scherrer Inst, Villigen, Switzerland. [Bye, Andreas; Braarud, Per Oivind] OECD Halden Reactor Project, Halden, Norway. [Lois, Erasmia] US Nucl Regulatory Commiss, Rockville, MD USA. [Forester, John] Sandia Natl Labs, Albuquerque, NM USA. [Kolaczkowski, Alan M.] SAIC, Eugene, OR USA. RP Dang, VN (reprint author), Paul Scherrer Inst, Villigen, Switzerland. EM vinh.dang@psi.ch OI Dang, Vinh/0000-0002-4921-2421 FU U.S. Nuclear Regulatory Commission (USNRC); Sandia Corporation; Lockheed Martin Company; United States Department of Energy [DE-AC04-94AL85000]; Swiss Federal Nuclear Inspectorate [82610] FX The contributions of the OECD Halden Reactor Project to the Empirical Study of HRA Methods are supported by the Joint Programme of the OECD Halden Reactor Project. In addition, parts of this work are funded by the U.S. Nuclear Regulatory Commission (USNRC) and performed at Sandia National Laboratories. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000. The work was also supported by the Swiss Federal Nuclear Inspectorate (DIS-Vertrag Nr. 82610). The opinions expressed in this paper are those of the authors and not those of the USNRC or of the authors organizations. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 243 EP + DI 10.1109/HFPP.2007.4413213 PG 2 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400047 ER PT B AU Forester, JA Kolaczkowski, AM Dang, VN Lois, E AF Forester, J. A. Kolaczkowski, A. M. Dang, V. N. Lois, E. GP IEEE TI Human reliability analysis (HRA) in the context of HRA testing with empirical data SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB Given the significant differences in the scope, approach, and underlying models of a relatively wide range of existing HRA methods, there has been a growing interest on the part of HRA method developers and users to empirically test the various methods. To this end, there is an ongoing international effort to begin this process by testing the application of HRA methods to nuclear power plant operating crew performance in the HANIIVMAB simulators at the Halden Reactor Project in Norway. Initial efforts in designing and implementing these studies have identified a number of issues associated with structuring the studies in order to allow an adequate and appropriate test of the different methods. This paper focuses on issues associated with applying HRA methods in the context of an empirical study, particularly when a research simulator is used for data collection. Example issues include: determining the scope of the analysis when the methods themselves differ in the scope of the HRA processes they address, accounting for differences between the methods in how they use simulator exercises to support the analysis, addressing the impact of experimental controls on application of methods, and given the low probability of human failure events typically modelled in nuclear power plant probabilistic risk/safety assessments (PRAs/PSAs), the need for analysts to present their results in a somewhat different format than they usually do. These types of issues related to applying HRA methods in the context of empirical studies are discussed and resolutions are proposed. C1 [Forester, J. A.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Kolaczkowski, A. M.] SAIC, Eugene, OR USA. [Dang, V. N.] Paul Scherrer Inst, Villigen, Switzerland. [Lois, E.] US Nucl Regulatory Commiss, Rockville, MD USA. RP Forester, JA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jafores@sandia.gov OI Dang, Vinh/0000-0002-4921-2421 FU U.S. Nuclear Regulatory Commission (USNRC); Sandia Corporation; Lockheed Martin Company; United States Department of Energy [DEAC04-94AL85000]; Swiss Federal Nuclear Inspectorate [82610] FX This work is an international effort partially funded by the U.S. Nuclear Regulatory Commission (USNRC) at Sandia National Laboratories. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DEAC04-94AL85000. The work is also funded by the Swiss Federal Nuclear Inspectorate (DIS-Vertag Nr. 82610). The opinions expressed in this paper do not necessarily represent those of the USNRC or the other organizations. NR 7 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 248 EP + DI 10.1109/HFPP.2007.4413214 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400048 ER PT B AU Tran, TQ Boring, RL Dudenhoeffer, DD Hallbert, BP Keller, MD Anderson, TM AF Tran, Tuan Q. Boring, Ronald L. Dudenhoeffer, Donald D. Hallbert, Bruce P. Keller, M. David Anderson, Tessa M. GP IEEE TI Advantages and disadvantages of physiological assessment for next generation control room design SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB We propose using non-obtrusive physiological assessment (e.g., eye tracking,) to assess human information processing errors (e.g., loss of vigilance) and limitations (e.g., workload) for advanced energy systems early in the design process. This physiological approach for assessing risk will circumvent many limitations of current risk methodologies such as subjective rating (e.g., rater's biases) and performance modeling (e.g., risk assessment is scripted and is, based upon the individual modeler's judgment). Key uses will be to evaluate (early in the design process) novel control room equipment and configurations as well as newly developed automated systems that will inevitably place a high information load on operators. The physiological risk assessment tool will allow better precision in pinpointing problematic design issues and will provide a "real-time" assessment of risk. Furthermore, this physiological approach would extend the state-of-the-art of human reliability methods from a "static" measure to more "dynamic." This paper will discuss a broad range of the current popular online performance gauges as well as its advantages and disadvantages for use in next generation control room. C1 [Tran, Tuan Q.; Boring, Ronald L.; Dudenhoeffer, Donald D.; Hallbert, Bruce P.] Idaho Natl Lab, Human Factors & I&C Dept, Idaho Falls, ID 83415 USA. [Keller, M. David] New Mexico State Univ, Dept Psychol, Las Cruces, NM USA. [Anderson, Tessa M.] Idaho State Univ, Dept Psychol, Pocatello, ID USA. RP Tran, TQ (reprint author), Idaho Natl Lab, Human Factors & I&C Dept, Idaho Falls, ID 83415 USA. EM tuan.tran@inl.gov; ronald.boring@inl.gov; donald.dudenhoeffer@inl.gov; bruce.hallbert@inl.gov; mdavidk@nmsu.edu; obortess@isu.edu RI Hallbert, Bruce/B-5435-2017 OI Hallbert, Bruce/0000-0002-4133-7625 NR 14 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 259 EP + DI 10.1109/HFPP.2007.4413216 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400050 ER PT B AU Whaley, AM Boring, RL Blackman, HS McCabe, PH Hallbert, BP AF Whaley, April M. Boring, Ronald L. Blackman, Harold S. McCabe, Patrick H. Hallbert, Bruce P. GP IEEE TI Lessons learned from dependency usage in HERA: Implications for THERP-related HRA methods SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB Dependency occurs when the probability of success or failure on one action changes the probability of success or failure on a subsequent action. Dependency may serve as a modifier on the human error probabilities (HEPs) for successive actions in human reliability analysis (HRA) models. Discretion should be employed when determining whether or not a dependency calculation is warranted: dependency should not be assigned without strongly grounded reasons. Human reliability analysts may sometimes assign dependency in cases where it is unwarranted. This inappropriate assignment is attributed to a lack of clear guidance to encompass the range of scenarios human reliability analysts are addressing. Inappropriate assignment of dependency produces inappropriately elevated HEP values. Lessons learned about dependency usage in the Human Event Repository and Analysis (HERA) system may provide clarification and guidance for analysts using THERP-based dependency models. This paper presents the HERA approach to dependency assessment and discusses considerations for dependency usage in HRA, including the cognitive basis for dependency, direction for determining when dependency should be assessed, considerations for determining the dependency level, temporal issues to consider when assessing dependency, (e.g., considering task sequence versus overall event sequence, and dependency over long periods of time), and diagnosis and action influences on dependency. C1 [Whaley, April M.; Boring, Ronald L.; Blackman, Harold S.; McCabe, Patrick H.; Hallbert, Bruce P.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Whaley, AM (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. RI Hallbert, Bruce/B-5435-2017 OI Hallbert, Bruce/0000-0002-4133-7625 NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 322 EP 327 DI 10.1109/HFPP.2007.4413227 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400061 ER PT B AU Gertman, DI Bruemmer, DJ Hartley, RS AF Gertman, David I. Bruemmer, David J. Hartley, R. Scott GP IEEE TI Improving emergency response and human-robotic performance SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB Preparedness for chemical, biological, and radiological/nuclear incidents at nuclear power plants (NPPs) includes the deployment of well trained emergency response teams. While teams are expected to do well, data from other domains suggests that the timeliness and accuracy associated with incident response can be improved through collaborative human-robotic interaction. Many incident response scenarios call for multiple, complex procedure-based activities performed by personnel wearing cumbersome personal protective equipment (PPE) and operating under high levels of stress and workload. While robotic assistance is postulated to reduce workload and exposure, limitations associated with communications and the robot's ability to act independently have served to limit reliability and reduce our potential to exploit human -robotic interaction and efficacy of response. Recent work at the Idaho National Laboroaty (INL) on expanding robot capability has the potential to improve human-system response during disaster management and recovery. Specifically, increasing the range of higher level robot behaviors such as autonomous navigation and mapping, evolving new abstractions for sensor and control data, and developing metaphors for operator control have the potential to improve state-of-the-art in incident response. This paper discusses these issues and reports on experiments underway intelligence residing on the robot to enhance emergency response. C1 [Gertman, David I.; Bruemmer, David J.; Hartley, R. Scott] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Gertman, DI (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 334 EP 340 DI 10.1109/HFPP.2007.4413229 PG 7 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400063 ER PT B AU Tran, TQ Garcia, H Boring, RL Joe, JC Hallbert, BP AF Tran, Tuan Q. Garcia, Humberto Boring, Ronald L. Joe, Jeffrey C. Hallbert, Bruce P. GP IEEE TI Human factors issues for multi-modular reactor units SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB Smaller and multi-modular reactors (MMR) will be highly technologically-advanced systems allowing more system flexibility to reactor configurations (e.g., addition/removal of reactor units). While the technical and financial advantages of such systems may be numerous, MMR presents many human factors challenges that may pose vulnerabilities to plant safety. An important human factors challenge in MMR operation and performance is the monitoring of data from multiple plants from centralized control rooms where human operators are responsible for interpreting, assessing, and responding to different system states (e.g., simultaneously monitoring refueling at one plant while vigilant to another plant's normal operating state). Furthermore, the operational, safety, and performance requirements for MMR can significantly change current staffing models and roles, the mode in which information is displayed, and the approach for conducting procedures and training. Consequently, addressing human factors concerns in NUM is essential in reducing plant risk. C1 [Tran, Tuan Q.; Garcia, Humberto; Boring, Ronald L.; Joe, Jeffrey C.; Hallbert, Bruce P.] Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. RP Tran, TQ (reprint author), Idaho Natl Lab, Human Factors & I&C Syst Dept, Idaho Falls, ID 83415 USA. RI Hallbert, Bruce/B-5435-2017 OI Hallbert, Bruce/0000-0002-4133-7625 NR 17 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 347 EP 352 DI 10.1109/HFPP.2007.4413231 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400065 ER PT B AU Brewer, JD AF Brewer, Jeffrey D. GP IEEE TI NAVIS-based knowledge transfer from system experts to their heirs apparent SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE ID PROBABILITY; UNCERTAINTY; JUDGMENT; DECISION; RISK; FIRM AB All organizations that survive for decades or more face the challenge of training new personnel to follow in the footsteps of system experts. The need for efficient and effective transfer of knowledge from system experts to the next generation of designers, builders, operators, and maintainers within complex systems is of critical importance in high-consequence domains (e.g., nuclear power, nuclear weapons, hazardous chemicals, bridge building, aircraft transport, space exploration, electric power grids). Unfortunately, data have indicated the presence of 10-40 year cyclical trends where organizations "forget" critical knowledge, experience an incident or accident, then "regain" critical knowledge for a finite period of time. While the causes of these recurring cases of "organizational amnesia" are varied, there is evidence that part of the problem is due to ineffective knowledge transfer from experts to their heirs apparent. Recently, a decision making process was developed that incorporates a unique taxonomy for understanding and aiding mitigation of perceptual/decision making biases. This taxonomy is comprised of twenty-seven recognized biases ordered into the categories of normative knowledge, availability, and individual specific biases (NAVIS). Foundational to the NAVIS approach are ten, well-defined critical thinking processes that can be used to mute the impact of undesirable biases, regulate the application of one's knowledge to a decision, and guide information gathering activities. In this paper, an application of the NAVIS approach is described which may greatly improve the efficiency and effectiveness of knowledge transfer from system experts to those seeking expert status. C1 Sandia Natl Labs, Risk & Reliabil Dept, Albuquerque, NM 87185 USA. RP Brewer, JD (reprint author), Sandia Natl Labs, Risk & Reliabil Dept, POB 5800, Albuquerque, NM 87185 USA. NR 48 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 360 EP 367 DI 10.1109/HFPP.2007.4413234 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400068 ER PT B AU Hallbert, BP Joe, JC Keefe, MJ Persensky, JJ AF Hallbert, Bruce P. Joe, Jeffrey C. Keefe, Molly J. Persensky, Julius J. GP IEEE TI Modeling and simulation approaches to developing human performance measures in nuclear industry SO 2007 IEEE 8TH HUMAN FACTORS AND POWER PLANTS AND HPRCT 13TH ANNUAL MEETING LA English DT Proceedings Paper CT IEEE 8th Conference on Human Factors and Power Plants/HPRCT 13th Annual Meeting CY AUG 26-31, 2007 CL Monterey, CA SP IEEE AB Human performance is a key component to the safe operation of nuclear power plants. Further, human performance is quite variable, and while some variability may be random, much of it may be attributed to factors that are difficult to assess. There is a need to identify and assess aspects of human performance that relate to plant safety and to develop measures that can be used to successfully assess human performance-for purposes of research that can lead to technical basis for developing human factors review criteria. C1 [Hallbert, Bruce P.; Joe, Jeffrey C.] Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID 83415 USA. [Keefe, Molly J.; Persensky, Julius J.] US Nucl Regulatory Commiss, Off Nucl Regulatory Res, Washington, DC USA. RP Hallbert, BP (reprint author), Idaho Natl Lab, Human Factors Instrumentat & Control Syst Dept, Idaho Falls, ID 83415 USA. EM Bruce.Hallbert@inl.gov; Jeffrey.Joe@inl.gov; mjk2@inl.gov; jjp2@inl.gov RI Hallbert, Bruce/B-5435-2017 OI Hallbert, Bruce/0000-0002-4133-7625 NR 7 TC 1 Z9 1 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0305-9 PY 2007 BP 373 EP + DI 10.1109/HFPP.2007.4413236 PG 2 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BIB11 UT WOS:000258061400070 ER PT S AU Abu-Khzam, FN Samatova, NF Rizk, MA Langston, MA AF Abu-Khzam, Faisal N. Samatova, Nagiza F. Rizk, Mohamad A. Langston, Michael A. GP IEEE TI The maximum common subgraph problem: Faster solutions via vertex cover SO 2007 IEEE/ACS INTERNATIONAL CONFERENCE ON COMPUTER SYSTEMS AND APPLICATIONS, VOLS 1 AND 2 SE International Conference on Computer Systems and Applications LA English DT Proceedings Paper CT 5th IEEE/ACS International Conference on Computer Systems and Applications (AICCSA-07) CY MAY 13-16, 2007 CL Amman, JORDAN SP IEEE, ACS ID ISOMORPHISM; ALGORITHMS; GRAPH AB In the maximum common subgraph (MCS) problem, we are given a pair of graphs and asked to find the largest induced subgraph common to them both. With its plethora of applications, MCS is a familiar and challenging problem. Many algorithms exist that can deliver optimal MCS solutions, but whose asymptotic worst-case run times fail to do better than mere brute-force, which is exponential in the order of the smaller graph. In this paper we present a faster solution to MCS. We transform an essential part of the search process into the task of enumerating maximal independent sets in only a part of only one of the input graphs. This is made possible by exploiting an efficient decomposition of a graph into a minimum vertex cover and the maximum independent set in its complement. The result is an algorithm whose run time is bounded by a junction exponential in the order of the smaller cover rather than in the order of the smaller graph. C1 [Abu-Khzam, Faisal N.; Rizk, Mohamad A.] Lebanese Amer Univ, Div Math & Comp Sci, Beirut, Lebanon. [Samatova, Nagiza F.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. [Langston, Michael A.] Univ Tennessee, Dept Comp Sci, Knoxville, TN 37996 USA. RP Abu-Khzam, FN (reprint author), Lebanese Amer Univ, Div Math & Comp Sci, Beirut, Lebanon. EM faisal.abukhzam@lau.edu.lb; samatovan@ornl.gov; mohammad.rizk@lau.edu.lb; langston@cs.utk.edu NR 15 TC 12 Z9 12 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2161-5322 BN 978-1-4244-1030-9 J9 I C COMP SYST APPLIC PY 2007 BP 367 EP + DI 10.1109/AICCSA.2007.370907 PG 2 WC Computer Science, Software Engineering; Telecommunications SC Computer Science; Telecommunications GA BGN24 UT WOS:000248573200051 ER PT S AU Schwadron, N Goodrich, C Spence, H Townsend, L Cucinotta, F Kim, MHY Weyland, M Golightly, MJ Desai, M Posner, A Hassler, D Krauss-Varban, D Luhmann, J Miller, J Heber, B Onsager, T AF Schwadron, Nathan Goodrich, Chuck Spence, Harlan Townsend, Larry Cucinotta, Frank Kim, Myung-Hee Y. Weyland, Mark Golightly, Michael J. Desai, Mihir Posner, Arik Hassler, Don Krauss-Varban, Dietmar Luhmann, Janet Miller, Jack Heber, Bemd Onsager, Terry GP IEEE TI Earth-Moon-Mars Radiation Environment Module (EMMREM) SO 2007 IEEE AEROSPACE CONFERENCE, VOLS 1-9 SE IEEE Aerospace Conference Proceedings LA English DT Proceedings Paper CT 2007 IEEE Aerospace Conference CY MAR 03-10, 2007 CL Big Sky, MT SP IEEE, Panasonic, Aerosp Corp, IET, dSPACE, CALTECH, Amer Inst Aeronaut & Astronaut, ASES ID SOLAR PARTICLE EVENTS; ISOTOPE SPECTROMETER; WIND SPACECRAFT; COSMIC-RAYS; SPECTRA; ABERRATIONS; DEPENDENCE; EXPOSURE; AUGUST; MODEL AB We are preparing to return humans to the Moon and setting the stage for exploration to Mars and beyond. However, it is unclear if long missions outside of Low-Earth Orbit (LEO) can be accomplished with acceptable risk. The central objective of our project, the Earth-Moon-Mars Radiation Exposure Module (EMMREM), is to develop and validate a numerical module for completely characterizing time-dependent radiation exposure in the Earth-Moon-Mars and Interplanetary space environments. EMMREM will provide the ability to predict radiation exposure on the surface or atmosphere of Earth, on the Moon, Mars, and in interplanetary space between Earth and Mars. EMMREM is being designed for broad use by researchers to predict radiation exposure by integrating over almost any incident particle distribution from interplanetary space. EMMREM is being developed using contemporary state-of-the-art particle radiation models. Beyond this, it will have the capability to incorporate new and improving models, as they become available, to give continually improved estimates of radiation hazards and effects. EMMREM will be comprehensively validated using direct and contemporaneous measurements near Earth, at the Moon and Mars to significantly reduce uncertainties in radiation exposure predictions. EMMREM will characterize the extremes, statistics, and variations over time of radiation exposure caused by solar energetic particles and cosmic rays. The results of EMMREM will improve risk assessment models so that future human exploration missions can be adequately planned for. This makes EMMREM highly relevant to NASA's Vision for Space Exploration and the Living With a Star Programs. (1 2). C1 [Schwadron, Nathan; Goodrich, Chuck; Spence, Harlan] Boston Univ, 725 Commonwealth, Boston, MA 02215 USA. [Townsend, Larry] Univ Tennessee, Knoxville, TN 37996 USA. [Cucinotta, Frank; Kim, Myung-Hee Y.; Weyland, Mark] NASA, Houston, TX 77058 USA. [Golightly, Michael J.] AFRL VSBXR, Hanscom AFB, MA 07131 USA. [Desai, Mihir; Posner, Arik] Southwest Res Inst, San Antonio, TX USA. [Hassler, Don] Southwest Res Inst, Boulder, CO 80302 USA. [Krauss-Varban, Dietmar; Luhmann, Janet] Univ Calif Berkeley, Berkeley, CA 94720 USA. [Miller, Jack] Lawrence Berkeley Natl lab, Berkeley, CA 94720 USA. [Heber, Bemd] Univ Kiel, D-24098 Kiel, Germany. [Onsager, Terry] NOAA, Space Environm Ctr, Boulder, CO 80303 USA. RP Schwadron, N (reprint author), Boston Univ, 725 Commonwealth, Boston, MA 02215 USA. EM nathanas@bu.edu; ccg@bu.edu; spence@bu.edu; ltownsen@tennessee.edu; francis.a.cucinotta1@jsc.nasa.gov; myung-hee.y.kim1@jsc.nasa.gov; Michael.Golightly@hanscom.af.mil; mdesai@swri.edu; aposner@swri.edu; hassler@boulder.swri.edu; varban@ssl.berkeley.edu; jgluhman@ssl.berkeley.edu; miller@lbl.gov; b.heber@physik.uni-stuttgart.de; terry.onsager@noaa.gov NR 53 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1095-323X BN 978-1-4244-0524-4 J9 AEROSP CONF PROC PY 2007 BP 520 EP + PG 5 WC Engineering, Aerospace; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Robotics SC Engineering; Computer Science; Robotics GA BGY10 UT WOS:000251235300046 ER PT S AU Andrews, J Teare, SW Restaino, SR Martinez, T Wilcox, C Wick, D AF Andrews, Jonathan Teare, Scott W. Restaino, Sergio R. Martinez, Ty Wilcox, Christopher Wick, David GP IEEE TI A high speed reflective wave front sensor using a novel MEM device SO 2007 IEEE AEROSPACE CONFERENCE, VOLS 1-9 SE IEEE Aerospace Conference Proceedings LA English DT Proceedings Paper CT 2007 IEEE Aerospace Conference CY MAR 03-10, 2007 CL Big Sky, MT SP IEEE, Panasonic, Aerosp Corp, IET, dSPACE, CALTECH, Amer Inst Aeronaut & Astronaut, ASES AB Sandia National Laboratory has constructed several segmented Micro-Electro-Mechanical (MEM) deformable mirrors that are under investigation for their suitability in Adaptive Optics systems for the Naval Research Laboratory. These mirrors are constructed in a hexagonal array and have been constructed with flat surfaces, orwith optical power allowing each mirror to bring its subaperture of light to a focus similar to a Shack-Hartman array.(1 2) Each mirror can use the tip, tilt and piston function to move the focused spots to the desired reference location, and the measurement of the applied voltage can be used directly to power a similar flat MEM deformable mirror. This paper reports on the suitability of this reflective wavefront sensor for closed-loop Adaptive Optics applications. C1 [Andrews, Jonathan; Restaino, Sergio R.; Martinez, Ty; Wilcox, Christopher] USN, Res Lab, Remote Sensing Div, Code 7216,3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. [Teare, Scott W.] New Mexico Inst Min & Technol, Dept Elect Engn, Socorro, NM 87801 USA. [Wick, David] Sandia Natl Labs, Alduquerque, NM 87123 USA. RP Andrews, J (reprint author), USN, Res Lab, Remote Sensing Div, Code 7216,3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. EM jonathan.andrews@kirtland.af.mil NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1095-323X BN 978-1-4244-0524-4 J9 AEROSP CONF PROC PY 2007 BP 1738 EP 1743 PG 6 WC Engineering, Aerospace; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Robotics SC Engineering; Computer Science; Robotics GA BGY10 UT WOS:000251235301067 ER PT S AU Wallace, JK Macintosh, B Shao, M Bartos, R Dumont, P Levine, BM Rao, S Samuele, R Shelton, C AF Wallace, J. Kent Macintosh, Bruce Shao, Michael Bartos, Randall Dumont, Phil Levine, B. Martin Rao, Shanti Samuele, Rocco Shelton, Chris GP IEEE TI An interferometric wave front sensor for measuring post-coronagraph errors on large optical telescopes SO 2007 IEEE AEROSPACE CONFERENCE, VOLS 1-9 SE IEEE Aerospace Conference Proceedings LA English DT Proceedings Paper CT 2007 IEEE Aerospace Conference CY MAR 03-10, 2007 CL Big Sky, MT SP IEEE, Panasonic, Aerosp Corp, IET, dSPACE, CALTECH, Amer Inst Aeronaut & Astronaut, ASES AB The Gemini Planet Imager (GPI) [1], now in the early stages of development, is a ground-based extreme adaptive optics system with an advanced coronagraphic system and integral-field spectrometer. At commissioning in early 2011, it will be deployed on one of the twin eight meter Gemini Telescopes. This powerful instrument, which works at a science wavelength in the near-infrared, will enable the direct detection and characterization of self-luminous Jupiter-class planets from the ground. Semi-static and non-common path wave front errors that are not sensed by the active wave front sensor in the adaptive optics system will lead to a focal plane speckle pattern that will mask exo-planets. The GPI Instrument will incorporate an interferometric wave front sensor, designed and developed at JPL, which will measure these errors. This talk will emphasis this novel sensor and describes how it is used to measure the non-common path amplitude and phase errors in the system that would otherwise limit the achievable contrast. We will describe the system error budget as well as simulations that model the system performance. Finally, we will also discuss the status of our laboratory testbed that is designed to test the fundamental principles of post-coronagraph wave front sensing. This system promises a rich combination of interferometry and large optical systems in support of cutting edge science research. C1 [Wallace, J. Kent; Shao, Michael; Bartos, Randall; Dumont, Phil; Levine, B. Martin; Rao, Shanti; Shelton, Chris] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. [Macintosh, Bruce] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Samuele, Rocco] Northrop Grumman, Redondo Beach, CA 90278 USA. RP Wallace, JK (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. EM James.K.Wallace@jpl.nasa.gov FU National Science Foundation Science and Technology Center for Adaptive Optics; [AST-9876783] FX This work has been supported in part or full by the National Science Foundation Science and Technology Center for Adaptive Optics, managed by the University of California at Santa Cruz under cooperative agreement No. AST-9876783 NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1095-323X BN 978-1-4244-0524-4 J9 AEROSP CONF PROC PY 2007 BP 2258 EP + PG 2 WC Engineering, Aerospace; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Robotics SC Engineering; Computer Science; Robotics GA BGY10 UT WOS:000251235302017 ER PT S AU Tralli, DM Foxall, W Schultz, C AF Tralli, David M. Foxall, William Schultz, Craig GP IEEE TI Concept for a high MEO InSAR seismic monitoring system SO 2007 IEEE AEROSPACE CONFERENCE, VOLS 1-9 SE IEEE Aerospace Conference Proceedings LA English DT Proceedings Paper CT 2007 IEEE Aerospace Conference CY MAR 03-10, 2007 CL Big Sky, MT SP IEEE, Panasonic, Aerosp Corp, IET, dSPACE, CALTECH, Amer Inst Aeronaut & Astronaut, ASES AB Demonstration of a spaceborne system to image seismic surface waves dynamically (i.e. coseismically) would be the early steps of a future operational capability for monitoring earthquakes and discriminating clandestine underground nuclear tests. Complementing the global network of seismic instruments, such system would enable unprecedented global mapping of the velocity structure of the Earth's crust, thereby improving hypocentral. location, understanding of rupture dynamics and wave propagation effects, and source characterization. Seismic wave measurement requirements include lower bounds on delectability of events and wave amplitude accuracy for different levels of analysis, such as source characterization and crustal tomography, with 10-100 mu m wave amplitude resolution for waves nominally traveling 5 km/s, an upper frequency bound based on earthquake surface displacement spectra, and minimum horizontal resolution (1-5 km) and areal coverage. Advanced radar technologies are keys to demonstrating a pre-operational system leading to a high MEO (10,400 km orbit altitude) constellation for continuous surveillance. (123). C1 [Tralli, David M.] NASA, Jet Prop Lab, CALTECH, Natl Space Technol Applicat Off, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. [Foxall, William; Schultz, Craig] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Tralli, DM (reprint author), NASA, Jet Prop Lab, CALTECH, Natl Space Technol Applicat Off, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. EM tralli@jpl.nasa.gov; bfoxall@llnl.gov NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1095-323X BN 978-1-4244-0524-4 J9 AEROSP CONF PROC PY 2007 BP 2869 EP + PG 2 WC Engineering, Aerospace; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic; Robotics SC Engineering; Computer Science; Robotics GA BGY10 UT WOS:000251235302082 ER PT S AU Su, MF El-Kady, IF Shaner, EA Christodoulou, CG AF Su, Mehmet F. El-Kady, Ihab F. Shaner, Eric A. Christodoulou, Christos G. GP IEEE TI Selective enhancement of Mid-IR quantum dot electroluminescent emissions using defect mode photonic crystal cavities SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc C1 [Su, Mehmet F.; El-Kady, Ihab F.; Christodoulou, Christos G.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA. [El-Kady, Ihab F.; Shaner, Eric A.] Sandia Natl Labs, Albuquerque, NM 94550 USA. RP Su, MF (reprint author), Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA. EM mfatihsu@ece.unm.edu RI El-Kady, Ihab/D-2886-2013 OI El-Kady, Ihab/0000-0001-7417-9814 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 2058 EP + PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973401166 ER PT S AU Casey, KF Pao, HY AF Casey, Kendall F. Pao, Hsueh-Yuan GP IEEE TI Low-frequency electromagnetic backscattering from tunnels SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc C1 [Casey, Kendall F.] SRI Int, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA. [Pao, Hsueh-Yuan] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Casey, KF (reprint author), SRI Int, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA. EM kendall.casey@sri.com; pao2@llnl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 3038 EP + PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973401404 ER PT S AU Warne, LK Jorgenson, RE Kotulski, JD Lee, KSH AF Warne, L. K. Jorgenson, R. E. Kotulski, J. D. Lee, K. S. H. GP IEEE TI Time harmonic scar statistics in two dimensional cavities SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc ID IMPEDANCE C1 [Warne, L. K.; Jorgenson, R. E.; Kotulski, J. D.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Lee, K. S. H.] ITT Ind, AES, Westwood, CA USA. RP Warne, LK (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM lkwarne@sandia.gov FU Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy [DE-AC04-94AL85000] FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 3057 EP + PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973401409 ER PT S AU Basilio, LI Peters, DW Loui, H AF Basilio, Lorena I. Peters, David W. Loui, Hung GP IEEE TI Plasmonic antireflection coatings in the infrared SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc C1 [Basilio, Lorena I.; Peters, David W.; Loui, Hung] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Basilio, LI (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 3061 EP 3064 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973401410 ER PT S AU Johnson, WA Basilio, LI Kotulski, JD Jorgenson, RE Warne, LK Coats, RS Wilton, DR Champagne, NJ Capolino, F Grant, JB Khayat, MA AF Johnson, William A. Basilio, Lorena I. Kotulski, Joseph D. Jorgenson, Roy E. Warne, Larry K. Coats, Rebecca S. Wilton, Donald R. Champagne, Nathan J. Capolino, Filippo Grant, J. Brian Khayat, Michael A. GP IEEE TI EIGER (TM): An open-source frequency-domain electromagnetics code SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc ID INTEGRALS; AIR C1 [Johnson, William A.; Basilio, Lorena I.; Kotulski, Joseph D.; Jorgenson, Roy E.; Warne, Larry K.; Coats, Rebecca S.] Sandia Natl Labs, Albuquerque, NM 87118 USA. [Wilton, Donald R.] Univ Houston, Houston, TX 77204 USA. [Champagne, Nathan J.] ERC Inc, ESCG JE02, Houston, TX 77258 USA. [Capolino, Filippo] Univ Siena, I-53100 Siena, Italy. [Grant, J. Brian] ANT S, Livermore, CA 94550 USA. [Khayat, Michael A.] NASA, Johnson Space Ctr, Houston, TX 77058 USA. RP Johnson, WA (reprint author), Sandia Natl Labs, Albuquerque, NM 87118 USA. EM wajohns@sandia.gov FU Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy [DE-AC04-94AL85000] FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000. NR 7 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 3065 EP + PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973401411 ER PT S AU Strassner, B AF Strassner, Berndie GP IEEE TI Lightweight, wideband, amplitude-tapered, linearly-polarized, dual-axis monopulse, Ku-band patch antenna array for SAR SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc DE wideband; patch; array; SAR; radar; antenna AB This paper reports a new lightweight, amplitude-tapered, wideband, linearly-polarized, dual-axis monopulse passive antenna array for synthetic aperture radar (SAR) applications. The 16 x 16 element patch array aperture is 197.7 cm(2) (140.61 mm from antenna edge to antenna edge in both orthogonal directions). The array is 2.98 mm thick and provides 17 % instantaneous bandwidth in Ku-band. It is easily manufactured using photolithographic etching techniques. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Strassner, B (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM bhstras@sandia.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 3996 EP 3999 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973402182 ER PT S AU Ehsanj, N Loui, H Kuester, EF Popovic, Z AF Ehsanj, Negar Loui, Hung Kuester, Edward F. Popovic, Zoya GP IEEE TI Dual-polarization large scan angle broadband thick-metal FSS SO 2007 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-12 SE IEEE Antennas and Propagation Society International Symposium LA English DT Proceedings Paper CT IEEE Antennas-and-Propagation-Society International Symposium CY JUN 09-15, 2007 CL Honolulu, HI SP IEEE, Antennas & Propagat Soc C1 [Ehsanj, Negar; Kuester, Edward F.; Popovic, Zoya] Univ Colorado, Dept Elect & Comp Engn, Boulder, CO 80309 USA. [Loui, Hung] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Ehsanj, N (reprint author), Univ Colorado, Dept Elect & Comp Engn, Boulder, CO 80309 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-3965 BN 978-1-4244-0877-1 J9 IEEE ANTENNAS PROP PY 2007 BP 4109 EP + PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHS60 UT WOS:000255973402209 ER PT S AU Saha, B Goebel, K Poll, S Christophersen, J AF Saha, Bhaskar Goebel, Kai Poll, Scott Christophersen, Jon GP IEEE TI An integrated approach to battery health monitoring using Bayesian regression and state estimation SO 2007 IEEE AUTOTESTCON, VOLS 1 AND 2 SE IEEE Autotestcon LA English DT Proceedings Paper CT 42nd Annual AUTOTESTCON Conference CY SEP 17-20, 2007 CL Baltimore, MD SP IEEE Aerosp & Elect Syst Soc, IEEE Instrumentat & Measurement Soc ID HYBRID-ELECTRIC VEHICLES; LEAD-ACID-BATTERIES; OF-CHARGE AB The application of the Bayesilan theory of managing uncertainty and complexity to regression and classification in the form of Relevance Vector Machine (RVM), and to state estimation via Particle Filters (PF), proves to be a powerful tool to integrate the diagnosis and prognosis of battery health. Accurate estimates of the state-of-charge (OC), the state-of-health (SOH) and state-of-life(SOL) for batteries provide a significant value addition to the management of any operation involving electrical systems. This is especially true for aerospace systems, where unanticipated battery performance may lead to catastrophic failures. Batteries, composed of multiple electrochemical cells, are complex systems whose internal state variables are either inaccessible to sensors or hard to measure under operational conditions. In addition, battery performance is strongly influenced by ambient environmental and load conditions. Consequently, inference and estimation techniques need to be applied on indirect measurements, anticipated operational conditions and historical data, for which a Bayeslan statistical approach is suitable. Accurate models of electro-chemical processes in the form of equivalent electric circuit parameters need to be combined with statistical models of state transitions, aging processes and measurement fidelity, need to be combined in a formal framework to make the approach viable. The RVM, which is a Bayesian treatment of the Support Vector Machine (SVM), is used for diagnosis as well as for model development. The PF framework uses this model and statistical estimates of the noise in the system and anticipated operational conditions to provide estimates of SOC, SOH and SOL. Validation of this approach on experimental data from Li-ion batteries is presented. C1 [Saha, Bhaskar] Georgia Inst Technol, 777 Atlant Dr, Atlanta, GA 30332 USA. [Goebel, Kai; Poll, Scott] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. [Christophersen, Jon] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Saha, B (reprint author), Georgia Inst Technol, 777 Atlant Dr, Atlanta, GA 30332 USA. EM bsaha@ece.gatech.edu; goebel@email.arc.ness.gov; spoll@email.arc.nasa.gov; Jon.Christophersen@inl.gov NR 15 TC 40 Z9 44 U1 4 U2 24 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1088-7725 BN 978-1-4244-1238-9 J9 IEEE AUTOTESTCON PY 2007 BP 646 EP + DI 10.1109/AUTEST.2007.4374280 PG 3 WC Automation & Control Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Automation & Control Systems; Computer Science; Engineering GA BHI79 UT WOS:000253448600087 ER PT B AU Hernandez, VJ Mendez, AJ Gagliardi, RM Bennett, CV Lennon, WJ AF Hernandez, V. J. Mendez, A. J. Gagliardi, R. M. Bennett, C. V. Lennon, W. J. GP IEEE TI Progress towards a virtual quadrant receiver for 4-ary pulse position modulation/optical code division multiple access (4-ary PPM/O-CDMA) networks SO 2007 IEEE AVIONICS, FIBER-OPTICS AND PHOTONICS TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT Avionics, Fiber-Optics and Photonics Technology Conference CY OCT 02-05, 2007 CL Victoria, CANADA SP IEEE C1 [Hernandez, V. J.; Bennett, C. V.; Lennon, W. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Mendez, A. J.] Mendez R&D Assoc, Ei Segundo, CA USA. [Gagliardi, R. M.] Univ Southern Calif, Los Angeles, CA USA. RP Hernandez, VJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Bennett, Corey/C-2403-2009; Hernandez, Vincent/C-2522-2009 OI Bennett, Corey/0000-0003-4365-5739; FU DARPA under SBIR Phase II Adoption [W31P4Q 05 C R161]; U.S. Department of Energy by the Universityof California, LLNL [W-7405-Eng-48] FX This work was supported in part by DARPA under SBIR Phase II Adoption contract W31P4Q 05 C R161. The joint collaboration between Mendez R & D Associated and Lawrence Liverm Ore National Laboratory (LLNL) was Carried Out under Co-operative Research and Developement Agreement (CRADA) TC-2015-02. This work was performed under the auspices of the U.S. Department of Energy by the Universityof California, LLNL, under ContractNo. W-7405-Eng-48. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0936-5 PY 2007 BP 32 EP + DI 10.1109/AVFOP.2007.4365734 PG 2 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BHF94 UT WOS:000252832700017 ER PT B AU Vawter, A Keeler, G Spahn, O Serkland, D Hsu, A Cowan, B Skogen, E Raring, J Shaw, M Sullivan, C AF Vawter, Allen Keeler, Gordon Spahn, Olga Serkland, Darwin Hsu, Alan Cowan, Bill Skogen, Erik Raring, James Shaw, Mike Sullivan, Charles GP IEEE TI Sandia photonics technology for avionics SO 2007 IEEE AVIONICS, FIBER-OPTICS AND PHOTONICS TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT Avionics, Fiber-Optics and Photonics Technology Conference CY OCT 02-05, 2007 CL Victoria, CANADA SP IEEE C1 [Vawter, Allen; Keeler, Gordon; Spahn, Olga; Serkland, Darwin; Hsu, Alan; Cowan, Bill; Skogen, Erik; Raring, James; Shaw, Mike; Sullivan, Charles] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Vawter, A (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0936-5 PY 2007 BP 54 EP 55 DI 10.1109/AVFOP.2007.4365745 PG 2 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BHF94 UT WOS:000252832700028 ER PT S AU Price, JR Gee, TF Paquit, V Tobin, KW AF Price, Jeffery R. Gee, Timothy F. Paquit, Vincent Tobin, Kenneth W., Jr. GP IEEE TI On the efficacy of correcting for refractive effects in iris recognition SO 2007 IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION, VOLS 1-8 SE IEEE Conference on Computer Vision and Pattern Recognition LA English DT Proceedings Paper CT IEEE Conference on Computer Vision and Pattern Recognition CY JUN 17-22, 2007 CL Minneapolis, MN SP IEEE, hp invent, INI-GraphicsNet, VIOSO ID POSTERIOR SURFACE; ASPHERICITY; ANTERIOR; CORNEA AB In this study, we aim to determine if iris recognition accuracy might be improved by correcting for the refractive effects of the human eye when the optical axes of the eye and camera are misaligned. We undertake this investigation using an anatomically-approximated, three dimensional model of the human eye and ray-tracing. We generate synthetic iris imagery from different viewing angles using first a simple pattern of concentric rings on the iris for analysis, and then synthetic texture maps on the iris for experimentation. We estimate the distortion from the concentric-ring iris images and use the results to guide the sampling of textured iris images that are distorted by refraction. Using the well-known Gabor filter phase quantization approach, our model-based results indicate that the Hamming distances between iris signatures from different viewing angles can be significantly reduced by accounting for refraction. Over our experimental conditions comprising viewing angles from 0 to 60 degrees, we observe a median reduction in Hamming distance of 27.4% and a maximum reduction of 70.0% when we compensate for refraction. Maximum improvements are observed at viewing angles of 20 degrees-25 degrees.. C1 [Price, Jeffery R.; Gee, Timothy F.; Paquit, Vincent; Tobin, Kenneth W., Jr.] Oak Ridge Natl Lab, Image Sci & Machine Vis Grp, POB 2008, Oak Ridge, TN 37831 USA. RP Price, JR (reprint author), Oak Ridge Natl Lab, Image Sci & Machine Vis Grp, POB 2008, Oak Ridge, TN 37831 USA. EM pricejr@ornl.gov RI Paquit, Vincent/K-9541-2013 OI Paquit, Vincent/0000-0003-0331-2598 NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1063-6919 BN 978-1-4244-1179-5 J9 PROC CVPR IEEE PY 2007 BP 2934 EP + PG 2 WC Computer Science, Software Engineering; Mathematical & Computational Biology; Remote Sensing; Imaging Science & Photographic Technology SC Computer Science; Mathematical & Computational Biology; Remote Sensing; Imaging Science & Photographic Technology GA BGT02 UT WOS:000250382806005 ER PT B AU Moorman, M Robinson, A Manginell, RP Tappan, AS Linker, K AF Moorman, Matthew Robinson, Alex Manginell, Ronald P. Tappan, Alexander S. Linker, Kevin GP IEEE TI Microfabricated chip for calibration of field instruments SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE AB Accurate, periodic calibration is required to operate IMS, GC, and portal security systems with maximum efficiency, surety, and operator confidence. To this end we are presently developing a microfabricated device for on-demand calibration of fieldable contraband detection instruments. Using robotically-assisted picoliter dispensing methods, precise nanogram or larger amounts of calibration compound(s) are placed on micron-sized bridge structures. Resistively heating these structures delivers precisely quantified low-levels of calibration compounds to the detector systems. This provides reliable calibration for identification and quantification of explosives, narcotics, and other contraband. C1 [Moorman, Matthew; Robinson, Alex; Manginell, Ronald P.; Tappan, Alexander S.; Linker, Kevin] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RP Moorman, M (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM mmoorma@sandia.gov FU United States Department of Energy's National Nuclear Security Administration [DE-ACO4-94AL85000] FX J. Patrick Ball conducted the TNT printing experiments and James W. Colovos assisted with motion control programming. Devices were fabricated by Cody Washburn and John Anderson. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-ACO4-94AL85000. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 34 EP + DI 10.1109/THS.2007.370016 PG 3 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800007 ER PT B AU Posse, C White, A Beagley, N AF Posse, Christian White, Amanda Beagley, Nathaniel GP IEEE TI Human-centered fusion framework SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE DE information fusion; fusion taxonomy; fusion framework; dynamic visualization AB In recent years the benefits of fusing signatures extracted from large amounts of distributed and/or heterogeneous data sources have been largely documented in various problems ranging from biological protein function prediction to cyberspace monitoring. In spite of significant progress in information fusion research, there is still no formal theoretical framework for defining various types of information fusion systems, defining and analyzing relations among such types, and designing information fusion systems using a formal method approach. Consequently, fusion systems are often poorly understood, are less than optimal, and/or do not suit user needs. To start addressing these issues, we outline a formal human-centered fusion framework for reasoning about fusion strategies. Our approach relies on a new taxonomy for fusion strategies, an alternative definition of information fusion in terms of parameterized paths in signature related spaces, an algorithmic formalization of fusion strategies and a library of numeric and dynamic visual tools measuring the impact as well as the impact behavior of fusion strategies. Using a real case of intelligence analysis we demonstrate that the proposed framework enables end users to rapidly 1) develop and implement alternative fusion strategies, 2) understand the impact of each strategy, 3) compare the various strategies, and 4) perform the above steps without having to know the mathematical foundations of the framework. We also demonstrate that the human impact on a fusion system is critical in the sense that small changes in strategies do not necessarily correspond to small changes in results. C1 [Posse, Christian; White, Amanda; Beagley, Nathaniel] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Posse, C (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. FU Pacific Northwest National Laboratory, through a Laboratory Directed Research and Development FX Manuscript received November 15, 2006. This work has been supported by the Pacific Northwest National Laboratory, through a Laboratory Directed Research and Development grant. NR 37 TC 0 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 111 EP + DI 10.1109/THS.2007.370030 PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800021 ER PT B AU Lo Presti, C Milbrath, B Tardiff, M Hartley-McBride, S AF Lo Presti, Charles Milbrath, Brian Tardiff, Mark Hartley-McBride, Stacey GP IEEE TI Results from application of time series concepts to vehicle gamma count profiles SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE DE radiation monitoring; gamma-ray spectroscopy; time series; statistical process control; anomaly detection ID UNIT-ROOT; STATIONARITY; TESTS AB Algorithms based on time-series analysis techniques were explored for maximizing the effectiveness of pass-through radiation portal monitors for detection of special nuclear material (SNM). Time-series properties of vehicle count profiles such as stationarity and autocorrelation within energy windows were characterized. Vehicle count profiles were nonstationary but were found to be made stationary by first-differencing. Autocorrelation functions showed consistent differences between NORM alarm and non-alarm vehicles. Injection studies were performed to assess the performance of time-domain detection algorithms based on stationarity tests and on the CUSUM change-point detection test. Results indicated possible roles for detection algorithms based on statistical process control and on time series concepts. C1 [Lo Presti, Charles; Milbrath, Brian; Tardiff, Mark; Hartley-McBride, Stacey] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Lo Presti, C (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM charles.lopresti@pnl.gov FU Pacific Northwest National Laboratory; U. S. Department of Energy [DE-AC05-76RL01830] FX The authors wish to acknowledge the following Pacific Northwest National Laboratory researchers.Dale Anderson provided insights into applicable time series theory and also encouragement that this approach be investigated. Terri Welsh performed exploratory data analysis of autocorrelations and power spectra which remain as avenues for further investigation. Intern Sonal Joshi contributed simulations of idealized vehicle profiles which helped further understanding of profile behavior. Landon Sego pointed usto a useful paper. Finally, Kevin Anderson and AlanBrothers pointed out numerous opportunities for improvements in their reviews of drafts of this report. This work was supported under the auspicesof the Laboratory Directed Research and Development program at Pacific Northwest National Laboratory. Manuscript received March 9, 2007. This work was supported in part by the U. S. Department of Energy under Contract DE-AC05-76RL01830. NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 133 EP + PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800025 ER PT B AU Estep, RJ Sapp, BA Russ, W AF Estep, Robert J. Sapp, Benjamin A. Russ, William GP IEEE TI Improved isotopic identification for NaI spectroscopic portal monitors using the material basis set (NOS) method SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE AB This report describes our application of the multiple isotope material basis set (MIMBS) method for isotope identification to the analysis of simulated spectra of NaI logs used in spectral portal monitors. The MIMBS method couples attenuation corrections for shielding materials with an ordinary isotopic response function fit. Spectrum simulations of twenty-four isotopes were generated using the Speculator software (with MCNP for attenuation calculations) for a 3x6x16- inch NaI log detector, through a series of attenuating absorbers representing a Z range from Al through Pb. Two-isotope combinations of these were analyzed using the MIMBS algorithm, with and without added K-40 background and Poisson noise. We found the MIMBS method to be highly accurate in identifying both the component isotopes and their relative amounts, even at high noise and background levels. C1 [Sapp, Benjamin A.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. [Russ, William] Canberra Ind, Meriden, CT USA. RP Estep, RJ (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA. EM restep@lanl.gov; bsapp@lanl.gov; WRuss@canberra.com NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 168 EP + DI 10.1109/THS.2007.370040 PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800031 ER PT B AU Vilim, RB Klann, R Fink, C Campos, C Medley, T AF Vilim, R. B. Klann, R. Fink, C. Campos, C. Medley, T. GP IEEE TI Sensitivity improvement in low-proffle distributed detector systems for tracking sources in transit SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE AB The RadTrac real-time detection and tracking software runs on a laptop computer networked to gamma-radiation detectors. A probabilistic estimate for source position is generated by combining measured count rate data with a first-principles stochastic model for the space and time dependence of count rates and knowledge of detector intrinsic efficiency. Recent development work has focused on improving RadTrac sensitivity in low-count rate situations. A method has been developed for processing count rates by energy according to that part of the energy spectrum with the greatest signal-to-noise ratio. In addition a method has been developed that places constraints on the solution that are physically appropriate when count rates approach background. In both instances experiments with a weak source confirmed the uncertainty in estimated position is reduced. C1 [Vilim, R. B.; Klann, R.; Fink, C.; Campos, C.; Medley, T.] Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. RP Vilim, RB (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM rvilim@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 174 EP + DI 10.1109/THS.2007.370041 PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800032 ER PT B AU Permann, MR AF Permann, May Robin GP IEEE TI Toward developing genetic algorithms to aid in critical infrastructure modeling SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE AB Today's society relies upon an array of complex national and international infrastructure networks such as transportation, telecommunication, financial and energy. Understanding these interdependencies is necessary in order to protect our critical infrastructure. The Critical Infrastructure Modeling System, CIMS (c), examines the interrelationships between infrastructure networks. CIMS (c) development is sponsored by the National Security Division at the Idaho National Laboratory (INL) in its ongoing mission for providing critical infrastructure protection and preparedness. A genetic algorithm (GA) is an optimization technique based on Darwin's theory of evolution. A GA can be coupled with CIMS (c) to search for optimum ways to protect infrastructure assets. This includes identifying optimum assets to enforce or protect, testing the addition of or change to infrastructure before implementation, or finding the optimum response to an emergency for response planning. This paper describes the addition of a GA to infrastructure modeling for infrastructure planning. It first introduces the CIMS (c) infrastructure modeling software used as the modeling engine to support the GA. Next, the GA techniques and parameters are defined. Then a test scenario illustrates the integration with CIMS (c) and the preliminary results. C1 [Permann, May Robin] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Permann, MR (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM may.permann@inl.gov NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 192 EP + DI 10.1109/THS.2007.370044 PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800035 ER PT B AU Fair, JM LeClaire, RJ Wilson, ML Turk, AL Deland, SM Powell, DK Klare, PC Ewers, M Dauelsberg, L Izraelevitz, D AF Fair, Jeanne M. LeClaire, Rene J. Wilson, Michael L. Turk, Alan L. Deland, Sharon M. Powell, Dennis K. Klare, Perry C. Ewers, Mary Dauelsberg, Lori Izraelevitz, David GP IEEE TI An integrated simulation of pandemic influenza evolution, mitigation and infrastructure response SO 2007 IEEE CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY: ENHANCING CRITICAL INFRASTRUCTURE DEPENDABILITY LA English DT Proceedings Paper CT IEEE Conference on Technologies for Homeland Security - Enhancing Critical Infrastructure Dependability CY MAY 16-17, 2007 CL Woburn, MA SP IEEE ID VACCINATION AB Decision makers, faced with highly complex alternatives for protecting our nation's critical infrastructures must understand the consequences of policy options before they enact solutions to prevent and mitigate disasters. An effective way to examine these tradeoffs is to use a computer simulation that integrates high level representations of each infrastructure, their interdependencies and reactions to a variety of potential disruptions. To address this need, the Critical Infrastructure Protection Decision Support System (CIPDSS) project, funded by the Department of Homeland Security Science and Technology Directorate (DHS S&T), has developed a decision support tool that provides insights to help decision makers make risk-informed decisions. With the addition of a disease progression simulation, the CIPDSS tool has a unique ability to provide a high-level, integrated analysis of a pandemic influenza outbreak while representing the impact on critical infrastructures. This simulation models the time-dependent evolution of the disease and can be calibrated to prior data or to other higher fidelity models as appropriate. Mitigation options such as the use of antivirals and vaccines as prophylaxis, treatment or some combination as well as quarantine options can be assessed Special attention is given to impacts to the population through sickness, targeted quarantine, or fear-based self-isolation and the resulting impacts on critical infrastructure operations. C1 [Fair, Jeanne M.; LeClaire, Rene J.; Powell, Dennis K.; Klare, Perry C.; Ewers, Mary; Dauelsberg, Lori; Izraelevitz, David] Los Alamos Natl Lab, POB 1663,Mail Stop F604, Los Alamos, NM 87545 USA. [Wilson, Michael L.; Turk, Alan L.; Deland, Sharon M.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Fair, JM (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop F604, Los Alamos, NM 87545 USA. EM rjl@lanl.gov; smdelan@sandia.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1052-1 PY 2007 BP 240 EP + DI 10.1109/THS.2007.370052 PG 2 WC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications SC Remote Sensing; Imaging Science & Photographic Technology; Telecommunications GA BGM92 UT WOS:000248535800043 ER PT B AU Endicott-Popovsky, BE Frincke, DA AF Endicott-Popovsky, Barbara E. Frincke, Deborah A. GP IEEE TI The observability calibration test development framework SO 2007 IEEE INFORMATION ASSURANCE WORKSHOP LA English DT Proceedings Paper CT IEEE Information Assurance Workshop CY JUN 20-22, 2007 CL W Point, NY SP IEEE DE digital forensics; life cycle; networks; network forensics AB Formal standards, precedents, and best practices for verifying and validating the behavior of low layer network devices used for digital evidence-collection on networks am badly needed-initially so that these can be employed directly by device owners and data users to document the behaviors of these devices for courtroom presentation, and ultimately so that calibration testing and calibration regimes are established and standardized as common practice for both vendors and their customers [1]. The ultimate intent is to achieve a state of confidence in device calibration that allows the network data gathered by them to be relied upon by all parties in a court of law. This paper describes a methodology for calibrating forensic-ready low layer network devices based on the Flaw Hypothesis Methodology [2,3]. C1 [Endicott-Popovsky, Barbara E.] Univ Washington, Informat Sch & UWIT Tacoma, Ctr Informat Assurance & Cybersecur, Seattle, WA 98105 USA. [Frincke, Deborah A.] Pacific NorthWest Natl Lab, Richland, WA 99352 USA. RP Endicott-Popovsky, BE (reprint author), Univ Washington, Informat Sch & UWIT Tacoma, Ctr Informat Assurance & Cybersecur, Seattle, WA 98105 USA. EM endicott@u.washington.edu; deborah.frincke@pnl.gov NR 22 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1303-4 PY 2007 BP 61 EP + DI 10.1109/IAW.2007.381915 PG 2 WC Computer Science, Information Systems; Computer Science, Theory & Methods SC Computer Science GA BGT44 UT WOS:000250408300010 ER PT B AU Chertkov, M AF Chertkov, Michael GP IEEE TI Reducing the error floor SO 2007 IEEE INFORMATION THEORY WORKSHOP, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE Information Theory Workshop CY SEP 02-06, 2007 CL Tahoe City, CA SP IEEE ID CODES AB We discuss how the loop calculus approach of [Chertkov, Chernyak '06], enhanced by the pseudo-codeword search algorithm of [Chertkov, Stepanov '06] and the facet-guessing idea from [Dimakis, Wainwright '06], improves decoding of graph based codes in the error-floor domain. The utility of the new, Linear Programming based, decoding is demonstrated via analysis and simulations of the model [155, 64, 20] code. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Chertkov, M (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RI Chertkov, Michael/O-8828-2015 NR 24 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1563-2 PY 2007 BP 230 EP 235 DI 10.1109/ITW.2007.4313079 PG 6 WC Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHI73 UT WOS:000253441300040 ER PT S AU Chartrand, R AF Chartrand, Rick GP IEEE TI Nonconvex compressed sensing and error correction SO 2007 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL III, PTS 1-3, PROCEEDINGS SE International Conference on Acoustics Speech and Signal Processing ICASSP LA English DT Proceedings Paper CT 32nd IEEE International Conference on Acoustics, Speech and Signal Processing CY APR 15-20, 2007 CL Honolulu, HI SP IEEE Signal Proc Soc DE signal reconstruction; error correction; minimization methods; linear codes; random codes ID ATOMIC DECOMPOSITION AB The theory of compressed sensing has shown that sparse signals can be reconstructed exactly from remarkably few measurements. In this paper we consider a nonconvex extension, where the l(1) norm of the basis pursuit algorithm is replaced with the l(p) norm, for p < 1. In the context of sparse error correction, we perform numerical experiments that show that for a fixed number of measurements, errors of larger support can be corrected in the nonconvex case. We also provide a theoretical justification for why this should be so. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chartrand, R (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM rickc@lanl.gov NR 16 TC 13 Z9 13 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1520-6149 J9 INT CONF ACOUST SPEE PY 2007 BP 889 EP 892 PG 4 WC Acoustics; Engineering, Electrical & Electronic; Imaging Science & Photographic Technology; Telecommunications SC Acoustics; Engineering; Imaging Science & Photographic Technology; Telecommunications GA BGN94 UT WOS:000248906600223 ER PT S AU Alam, SR Vetter, JS Smith, MC AF Alam, Sadaf R. Vetter, Jeffrey S. Smith, Melissa C. GP IEEE TI An application specific memory characterization technique for co-processor accelerators SO 2007 IEEE INTERNATIONAL CONFERENCE ON APPLICATION-SPECIFIC SYSTEMS, ARCHITECTURES, AND PROCESSORS SE IEEE International Conference on Application-Specific Systems Architectures and Processors LA English DT Proceedings Paper CT 18th IEEE International Conference on Application-Specific Systems, Architectures and Processors CY JUL 08-11, 2007 CL Montreal, CANADA SP IEEE AB Commodity accelerator technologies including reconfigurable devices provide an order of magnitude performance improvement compared to mainstream microprocessor systems. A number of compute-intensive scientific applications, therefore, can potentially benefit from commodity computing devices available in the form of co-processor accelerators. However, there has been little progress in accelerating production-level scientific applications using these technologies due to several programming and performance challenges. One of the key performance challenges is performance sustainability. While computation is often accelerated substantially by accelerator devices, the achievable performance is significantly lower once the data transfer costs and overheads are incorporated. We present an application-specific memory characterization technique for an FPGA-accelerated system that enabled us to reduce data transfer overhead by a factor of five for a production-scale scientific application. Our proposed technique extends to applications that exhibit similar memory behavior and to co-processor accelerator systems that support data streaming, pipelining, and overlapped execution. C1 [Alam, Sadaf R.; Vetter, Jeffrey S.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Smith, Melissa C.] Clemson Univ, Clemson, SC USA. RP Alam, SR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM alamsr@oml.gov; vetter@oml.gov; smithmc@clemson.edu FU U.S. Government [DE-AC05-00OR22725] FX The submitted manuscript has been authored by a contractor of the U.S. Government under Contract No. DE-AC05-00OR22725. Accordingly, the U.S. Government retains a non exclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. NR 14 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1063-6862 BN 978-1-4244-1026-2 J9 IEEE INT CONF ASAP PY 2007 BP 353 EP + DI 10.1109/ASAP.2007.4459289 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHQ53 UT WOS:000255432100055 ER PT S AU Yoo, TS Garcia, HE AF Yoo, Tae-Sic Garcia, Humberto E. GP IEEE TI Intruder activity analysis under unreliable sensor networks SO 2007 IEEE INTERNATIONAL CONFERENCE ON AUTOMATION SCIENCE AND ENGINEERING, VOLS 1-3 SE IEEE International Conference on Automation Science and Engineering LA English DT Proceedings Paper CT IEEE International Conference on Automation Science and Engineering CY SEP 22-25, 2007 CL Scottsdale, AZ SP IEEE ID ALGORITHM; MODEL AB This paper addresses the problem of counting intruder activities within a monitored domain by a sensor network. The deployed sensors are unreliable. We characterize imperfect sensors with misdetection and false-alarm probabilities. We model intruder activities with Markov Chains. A set of Hidden Markov Models (HMM) models the imperfect sensors and intruder activities to be monitored. A novel sequential change detection/isolation algorithm is developed to detect and isolate a change from an HMM representing no intruder activity to another HMM representing some intruder activities. Procedures for estimating the entry time and the trace of intruder activities are developed. A domain monitoring example is given to illustrate the presented concepts and computational procedures. C1 [Yoo, Tae-Sic; Garcia, Humberto E.] Idaho Natl Lab, Sensor & Decis Syst Grp, Idaho Falls, ID 83415 USA. RP Yoo, TS (reprint author), Idaho Natl Lab, Sensor & Decis Syst Grp, Idaho Falls, ID 83415 USA. EM Tae-Sic.Yoo@inl.gov; Humberto.Garcia@inl.gov NR 23 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2161-8070 BN 978-1-4244-1153-5 J9 IEEE INT CON AUTO SC PY 2007 BP 507 EP 513 PG 7 WC Automation & Control Systems; Robotics SC Automation & Control Systems; Robotics GA BHT88 UT WOS:000256345500084 ER PT S AU Park, BH Zhang, B Karpinets, T Samatova, NF AF Park, Byung-Hoon Zhang, Bing Karpinets, Tatiana Samatova, Nagiza F. BE Hu, X Mandoiu, I Obradovic, Z Xia, J TI Multi-stage framework to infer protein functional modules from mass spectrometry pull-down data with assessment of biological relevance SO 2007 IEEE INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICINE, PROCEEDINGS SE IEEE International Conference on Bioinformatics and Biomedicine-BIBM LA English DT Proceedings Paper CT IEEE International Conference on Bioinformatics and Biomedicine CY NOV 02-04, 2007 CL Fremont, CA SP IEEE Comp Soc Local Chapter, Addison Wesley, AT&T Res, Bell Labs, Brio, Course Technol, Crystal Decis, Dell, Elsevier, Google, HP Res, Hyperion, IBM Silicon Valley, IBM, Intel Corp, Microsoft, NASA, Nokia, Oak Ridge Natl Labs, Oracle, Pfizer, Sony, Verizon, Yahoo ID GENE ONTOLOGY; COMPLEXES; NETWORKS; SETS AB Protein functional modules are fundamental units in protein interaction networks. High-throughput Mass Spectrometry (MS) technology has become valuable for discovery of protein functional modules. Yet, their computational inference from MS pull-down data and biological significance evaluation are still challenging. This paper introduces an integrated multi-step framework for (1) assessing protein-protein interaction affinities, (2) constructing a genome-wide protein association map, (3) finding putative protein functional modules, and (4) evaluating their biological relevance. The protein affinity score utilizes co-purification pattern of two proteins and adopts an information theoretic-approach to build the protein affinity map. Putative protein modules are then derived using a graph-theoretical approach. A two-stage statistical procedure assesses biological relevance of identified modules. On Saccharomyces cerevisiae's pull-down data (Nature, vol. 415, pp. 141-7, 2002), the scoring scheme outperformed other methods by at least 10% in F-1-measure, and statistical tests identified 489 protein modules enriched in all of three general GO categories with p-values less than 0.05. C1 [Park, Byung-Hoon; Zhang, Bing; Karpinets, Tatiana; Samatova, Nagiza F.] Oak Ridge Natl Lab, Computat Biol Inst, Oak Ridge, TN 37831 USA. RP Park, BH (reprint author), Oak Ridge Natl Lab, Computat Biol Inst, Oak Ridge, TN 37831 USA. EM samatovan@ornl.gov RI Karpinets, Tatiana/F-4505-2011 NR 16 TC 0 Z9 0 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA SN 2156-1125 BN 978-0-7695-3031-4 J9 IEEE INT C BIOINFORM PY 2007 BP 223 EP 229 DI 10.1109/BIBM.2007.14 PG 7 WC Computer Science, Information Systems; Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHD92 UT WOS:000252387400030 ER PT S AU Lu, YG Strauss, CEM AF Lu, Yonggang Strauss, Charlie E. M. BE Chen, XW Damiani, E He, H Gao, J Li, JY Sidhu, AS Song, M Yoo, I Zhou, XH TI Incorporating constraints from low resolution density map in Ab initio structure prediction using Rosetta SO 2007 IEEE INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICINE WORKSHOPS, PROCEEDINGS SE IEEE International Conference on Bioinformatics and Biomedicine Workshop-BIBMW LA English DT Proceedings Paper CT IEEE International Conference on Bioinformatics and Biomedicine CY NOV 02-04, 2007 CL Fremont, CA SP IEEE Comp Soc Local Chapter, Addison Wesley, AT&T Res, Bell Labs, Brio, Course Technol, Crystal Decis, Dell, Elsevier, Google, HP Res, Hyperion, IBM Silicon Valley, IBM, Intel Corp, Microsoft, NASA, Nokia, Oak Ridge Natl Labs, Oracle, Pfizer, Sony, Verizon, Yahoo ID INFORMATICS APPROACH; BETA-SHEETS; PROTEIN; ANGSTROM AB We have developed a new method for adding constraints derived from low resolution density maps to Rosetta ab initio prediction method. This method incorporates the geometrical constraints of the helix skeleton that can be detected from a low resolution density map. We propose a 2-stage approach to predict the backbone of a protein from a low resolution map. In stage one, a small set of possible topologies will be predicted for the helix skeleton [1]. This paper describes the second stage that is to predict the backbone of the protein from a low resolution density map. A constraint scoring function was developed and incorporated in the Rosetta simulation process. The entire density map is only used for the final selection among the possible backbones that satisfy the constraints. Our method was tested with 16 mainly alpha-helical proteins ranging from 50 to 150 residues. 12 of the 16 proteins show improved accuracy for both the top I prediction and the best of the top 5 predictions. The average improvement of the RMSD to native is 4.76 angstrom for the top 1 model and 3.05 angstrom for the best of the top 5 ranked models when the density map is applied. C1 [Lu, Yonggang] New Mexico State Univ, Dept Comp Sci, Las Cruces, NM 88003 USA. [Strauss, Charlie E. M.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Lu, YG (reprint author), New Mexico State Univ, Dept Comp Sci, Las Cruces, NM 88003 USA. EM ylu@cs.nmsu.edu; cems@lanl.gov OI He, Jing/0000-0002-7249-4746 FU NSF [HRD-0420407]; LANL Univ. of California Directed Research and Development Fund; LANL-LDRD-DR; DOE GTL fund FX This work was partially supported by NSF HRD-0420407, LANL Univ. of California Directed Research and Development Fund, LANL-LDRD-DR and DOE GTL fund. NR 16 TC 2 Z9 2 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA SN 2163-6966 BN 978-1-4244-1604-2 J9 IEEE INT C BIO BIO W PY 2007 BP 67 EP + DI 10.1109/BIBMW.2007.4425402 PG 2 WC Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH89 UT WOS:000253368800010 ER PT B AU Otoo, EJ Rotem, D AF Otoo, Ekow J. Rotem, Doron GP IEEE TI Parallel Access of Out-Of-Core Dense Extendible Arrays SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE ID GLOBAL ARRAYS; PERFORMANCE AB Datasets used in scientific and engineering applications are often modeled as dense multi-dimensional arrays. For very large datasets, the corresponding array models are typically stored out-of-core as array files. The array elements are mapped onto linear consecutive locations that correspond to the linear ordering of the multi-dimensional indices. Two conventional mappings used are the row-major order and the column-major order of multi-dimensional arrays. Such conventional mappings of dense array files highly limit the performance of applications and the extendibility of the dataset. Firstly, an array file that is organized in say row-major order causes applications that subsequently access the data in column-major order, to have abysmal performance. Secondly, any subsequent expansion or the array file is limited to only one dimension. Expansions of such out-of-core conventional arrays along arbitrary dimensions, require storage reorganization that can be very expensive. We present a solution for storing out-of-core dense extendible arrays that resolve the two limitations. The method uses a mapping function.F-*(), together with information maintained in axial vectors, to compute the linear address of an extendible array element when passed its k-dimensional index. We also give the inverse function, F-*(-1)() for deriving the k-dimensional index when given the linear address. We show how the mapping function, in combination with MPI-IO and a parallel file system, allows for the growth of the extendible array without reorganization and no significant performance degradation of applications accessing elements in any desired order. We give methods for reading and writing sub-arrays into and out of parallel applications that run on a cluster of workstations, The axial-vectors are replicated and maintained in each node that accesses sub-array elements. C1 [Otoo, Ekow J.; Rotem, Doron] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Otoo, EJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 50B-3238, Berkeley, CA 94720 USA. EM ekw@data.lbl.gov; d.rotem@lbl.gov NR 23 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 31 EP 40 DI 10.1109/CLUSTR.2007.4629214 PG 10 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300004 ER PT B AU Krishnamoorthy, S Canovas, JP Tipparaju, V Nieplocha, J Sadayappan, P AF Krishnamoorthy, Sriram Canovas, Juan Piernas Tipparaju, Vinod Nieplocha, Jarek Sadayappan, P. GP IEEE TI Non-collective Parallel I/O for Global Address Space Programming Models SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Achieving high performance for out-of-core applications typically involves explicit management of the movement of data between the disk and the physical memory. We are developing a programming environment in which the different levels of the memory hierarchy are handled efficiently in a unified transparent framework. In this paper, we present our experiences with implementing efficient non-collective I/O (GPC-IO) as part of this framework. As a generalization of the Remote Procedure Call (RPC) that was used as a foundation for the Sun NFS system, we developed a global procedure call (GPC) to invoke procedures on a remote node to handle non-collective I/O. We consider alternative approaches that can be employed in implementing this functionality. The approaches are evaluated using a representative computation from quantum chemistry. The results demonstrate that GPC-IO achieves better absolute execution times, strong-scaling, and weak-scaling than the alternatives considered. C1 [Krishnamoorthy, Sriram; Sadayappan, P.] Ohio State Univ, Dept Comp Sci & Engn, 395 Dreese Labs,2015 Neil Ave, Columbus, OH 43210 USA. [Canovas, Juan Piernas; Tipparaju, Vinod; Nieplocha, Jarek] Pacific NW Natl Lab, Dept Appl Math & Comp Sci, Richland, WA USA. RP Krishnamoorthy, S (reprint author), Ohio State Univ, Dept Comp Sci & Engn, 395 Dreese Labs,2015 Neil Ave, Columbus, OH 43210 USA. EM krishnsr@cse.ohio-state.edu; juanpiernas.canovas@pnl.gov; vinod.tipparaju@pnl.gov; jarek.nieplocha@pnl.gov; saday@cse.ohio-state.edu FU National Science Foundation [0121676, 0403342]; U.S. Department of Energy [DE-AC05- 00OR22725] FX We thank the National Science Foundation for the support of this research through grants 0121676 and 0403342, and the U.S. Department of Energy through award DE-AC05- 00OR22725. We thank the Molecular Sciences Computing Facility (MSCF) at the Pacific Northwest National Laboratory (PNNL) for the use of their computing facilities. NR 20 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 41 EP + DI 10.1109/CLUSTR.2007.4629215 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300005 ER PT B AU Laros, JH Ward, L Klundt, R Kelly, S Tomkins, JL Kellogg, BR AF Laros, James H., III Ward, Lee Klundt, Ruth Kelly, Sue Tomkins, James L. Kellogg, Brian R. GP IEEE TI Red Storm IO Performance Analysis SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB This paper will summarize an IO1 performance analysis effort performed on Sandia National Laboratories Red Storm platform. Our goal was to examine the 10 system performance and identify problems or bottle-necks in any aspect of the 10 sub-system. Our process examined the entire 10 path from application to disk both in segments and as a whole. Our final analysis was performed at scale employing parallel 10 access methods typically used in High Performance Computing applications. C1 [Laros, James H., III; Ward, Lee; Kelly, Sue; Tomkins, James L.; Kellogg, Brian R.] Sandia Natl Labs, 1515 Eubank SE, Albuquerque, NM 87123 USA. [Klundt, Ruth] Hewlett Packard Corp, Palo Alto 94304, CA USA. RP Laros, JH (reprint author), Sandia Natl Labs, 1515 Eubank SE, Albuquerque, NM 87123 USA. EM jhlaros@sandia.gov; lee@sandia.gov; rklundt@sandia.gov; smkelly@sandia.gov; jltomki@sandia.gov; brkello@sandia.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 50 EP + DI 10.1109/CLUSTR.2007.4629216 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300006 ER PT B AU Desai, N Voran, T Lusk, E Cherry, A AF Desai, Narayan Voran, Theron Lusk, Ewing Cherry, Andrew GP IEEE TI The Computer as Software Component: A Mechanism for Developing and Testing Resource Management Software SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB In this paper, we present an architecture that encapsulates system hardware inside a software component used for job execution and status monitoring. The development of this interface has enabled system simulation, which yields a number of novel benefits, including dramatically improved debug and testing capabilities. C1 [Desai, Narayan; Lusk, Ewing] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60449 USA. [Voran, Theron] Univ Colorado, Dept Comp Sci, Boulder, CO 80309 USA. [Cherry, Andrew] Argonne Natl Lab, Leadship Comp Fac, Argonne, IL 60439 USA. RP Desai, N (reprint author), Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60449 USA. EM desai@mcs.anl.gov; theron.voran@colorado.edu; lusk@mcs.anl.gov; acherry@alcf.anl.gov FU Mathematical, Information, and Computational Sciences Division subprogram of the Office of Advanced Scientific Computing Research; Office of Science; U.S. Department of Energy [DE-AC02-06CH11357]; DOE SciDAC [DE-FG02-04ER63870]; NSF MRI [CNS-0420873]; NSF sponsorship of the National Center for Atmospheric Research FX This work was supported by the Mathematical, Information, and Computational Sciences Division subprogram of the Office of Advanced Scientific Computing Research, Office of Science, U.S. Department of Energy, under Contract DE-AC02-06CH11357. Other support was from the DOE SciDAC program under award #DE-FG02-04ER63870, NSF MRI Grant #CNS-0420873, and the NSF sponsorship of the National Center for Atmospheric Research. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 58 EP + DI 10.1109/CLUSTR.2007.4629217 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300007 ER PT B AU Scarpazza, DP Mullaney, P Villa, O Petrini, F Tipparaju, V Brown, DML Nieplocha, J AF Scarpazza, D. P. Mullaney, P. Villa, O. Petrini, F. Tipparaju, V. Brown, D. M. L., Jr. Nieplocha, J. GP IEEE TI Transparent System-level Migration of PGAS Applications using Xen on InfiniBand SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE ID FAULT-TOLERANCE AB Checkpoint-restart is considered one of the most natural approaches to achieving fault-tolerance in a high-performance cluster. While experiences has focused attention on user-level solutions, the advent of efficient system-level virtualization software, such as Xen and VMWare, has opened the door to the possibility of efficient and scalable cluster-level virtualization. In this paper we present an innovative approach to cluster fault tolerance by integrating the Xen virtualization with the latest generation of the InfiniBand network. A major contribution of this approach is the automatic identification of global recovery lines to freeze the status of the machine. Our focus is on the partitioned global address space (PGAS) programming models. PGAS models has been receiving an increasing amount of attention in the recent years. We have developed a global coordination mechanism and deployed it in the Aggregate Remote Memory Copy Interface (ARMCI) one-sided communication library that has been used as a run-time system for several PGAS languages and libraries. The experimental results show that it is possible to virtualize communication and computation with minimal overhead and to provide seamless migration capabilities. C1 [Scarpazza, D. P.; Villa, O.; Petrini, F.; Tipparaju, V.; Brown, D. M. L., Jr.; Nieplocha, J.] Pacific NW Natl Lab, MS K7-90,902 Battelle Blvd, Richland, WA 99352 USA. [Mullaney, P.] Novell Corp, Waltham, MA 02451 USA. RP Scarpazza, DP (reprint author), Pacific NW Natl Lab, MS K7-90,902 Battelle Blvd, Richland, WA 99352 USA. EM daniele.scarpazza@pnl.gov; pmullaney@novell.com; fabrizio.petrini@pnl.gov; vinod@pnl.gov; david.brown@pnl.gov; jarek.nieplocha@pnl.gov NR 39 TC 2 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 74 EP + DI 10.1109/CLUSTR.2007.4629219 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300009 ER PT B AU Alam, SR Meredith, JS Vetter, JS AF Alam, Sadaf R. Meredith, Jeremy S. Vetter, Jeffrey S. GP IEEE TI Balancing Productivity and Performance on the Cell Broadband Engine SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE ID PROCESSOR AB The Cell Broadband Engine (BE) is a heterogeneous multicore processor, combining a general-purpose POWER architecture core with eight independent single-instruction-multiple-data (SIMD) cores. Each core is capable of very high performance; however, users must explicitly manage data movement, scheduling, and synchronization. While these attributes provide some of the Cell processor's greatest performance strengths, they also form its greatest weaknesses in terms of developer productivity, code portability, and initial performance efficiencies. In this paper, we evaluate productivity and relative performance improvements of a Cell BE system for a diverse set of kernels and applications. Our experimental workload includes algorithms from scientific, cognitive, and imaging problem domains. Our results demonstrate that the Cell processor could be several times faster than a SSE-enabled, contemporary dual-core processor, and could sustain a high performance-to-productivity ratio. We outline strategies for transforming applications to exploit the Cell's architectural features, and measure productivity by comparing programming effort in terms of lines of code and performance. For instance, our measurements revealed that a covariance matrix creation routine - a common routine in hyperspectral imaging - ran over eight times faster than a 2.66 GHz Intel Woodcrest processor while sustaining a productivity metric of over two by parallelizing across the heterogeneous cores, unrolling loops, and improving instruction level parallelism with SIMD instructions in a high-level language. C1 [Alam, Sadaf R.; Meredith, Jeremy S.; Vetter, Jeffrey S.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Alam, SR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. EM alamsr@ornl.gov; jsmeredith@ornl.gov; vetter@ornl.gov NR 26 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 149 EP 158 DI 10.1109/CLUSTR.2007.4629227 PG 10 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300017 ER PT B AU Sancho, JC Kerbyson, DJ Barker, KJ AF Sancho, Jose Carlos Kerbyson, Darren J. Barker, Kevin J. GP IEEE TI Efficient Offloading of Collective Communications in Large-Scale Systems SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB In parallel applications communication overheads generally increase as the processor count increases and in particular, collective communication operations can become a critical limiting factor in achieving high performance. In this paper we explore a novel technique to boost application performance by dedicating some processors in the system to collective operations. We demonstrate the viability and efficiency of this approach for the Allreduce collective operation on a state-of-the-art cluster. Experimental results show that the collective latency can be reduced by 30% and that the communication overhead per processor is also very low, at 1.6 mu s, which represents one order of magnitude higher performance than with conventional implementations. Moreover, results on a large-scale scientific application (POP) show that this approach achieves 15% higher performance on 640 processors than when using the default collective implementation. C1 [Sancho, Jose Carlos; Kerbyson, Darren J.; Barker, Kevin J.] Los Alamos Natl Lab, Comp Sci HPC CCS 1, PAL, Los Alamos, NM 87545 USA. RP Sancho, JC (reprint author), Los Alamos Natl Lab, Comp Sci HPC CCS 1, PAL, POB 1663, Los Alamos, NM 87545 USA. EM jcsancho@lanl.gov; djk@lanl.gov; kjbarker@lanl.gov RI Sancho , Jose Carlos/B-3125-2016 OI Sancho , Jose Carlos/0000-0002-6917-9155 NR 16 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 169 EP 178 DI 10.1109/CLUSTR.2007.4629229 PG 10 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300019 ER PT B AU Hemmert, KS Underwood, KD Rodrigues, A AF Hemmert, K. Scott Underwood, Keith D. Rodrigues, Arun GP IEEE TI An Architecture to Perform NIC Based MPI Matching SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Modern supercomputers aggregate thousands of microprocessors through a high performance network. Many of these systems place a processor on the network interface controller (NIC) to handle some portion of the MPI processing. This processing involves traversing a linked list and invoking a matching function for each item. Although this task is critical to the performance of the system, microprocessors perform it extremely poorly. Furthermore, the traditional network processor approaches of multicore and multithreading map poorly to the problem because the list is a shared data structure. While match processing can be implemented directly in hardware, hardware implementations can be extremely inflexible and lead to extremely high risk. This paper presents a novel, programmable architecture for a processor to handle the matching function. The matching engine approaches the performance of a direct hardware implementation while maintaining a high degree of flexibility and programmability. More importantly, it requires a dramatically smaller area than a conventional processor. C1 [Hemmert, K. Scott; Underwood, Keith D.; Rodrigues, Arun] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hemmert, KS (reprint author), Sandia Natl Labs, POB 5800,MS-1319, Albuquerque, NM 87185 USA. EM kshemme@sandia.gov; kdunder@sandia.gov; afrodri@sandia.gov NR 29 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 211 EP 221 DI 10.1109/CLUSTR.2007.4629234 PG 11 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300024 ER PT B AU Pakin, S Johnson, G AF Pakin, Scott Johnson, Greg GP IEEE TI Performance Analysis of a User-level Memory Server SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Large-scale parallel applications often produce immense quantities of data that need to be analyzed. To avoid performing repeated, costly disk accesses, analysis of large data sets generally requires a commensurately large amount of memory. While some data-analysis tools can easily be parallelized to distribute memory across a cluster, other tools are either difficult to parallelize or, in the case of simple data-analysis scripts with short lifespans, not worth the effort to parallelize. In this work, we present and analyze the performance of JumboMem, a simple, entirely user-level parallel program that enables unmodified sequential applications to access all of the memory in a cluster. Although there are many implementations of memory servers, all require either administrative privileges or program modifications. More importantly, no existing memory server has been evaluated on modern workstation clusters with high-speed networks, many nodes, and significant quantities of memory. This paper represents the first study of memory-server performance at supercomputing scales. C1 [Pakin, Scott; Johnson, Greg] Los Alamos Natl Lab, Performance & Architecture Lab, Los Alamos, NM 87545 USA. RP Pakin, S (reprint author), Los Alamos Natl Lab, Performance & Architecture Lab, Los Alamos, NM 87545 USA. EM pakin@lanl.gov; gjohnson@lanl.gov OI Pakin, Scott/0000-0002-5220-1985 NR 25 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 249 EP 258 DI 10.1109/CLUSTR.2007.4629238 PG 10 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300028 ER PT B AU Tikotekar, A Vallee, G Naughton, T Scott, SL Leangsuksun, C AF Tikotekar, Anand Vallee, Geoffroy Naughton, Thomas Scott, Stephen L. Leangsuksun, Chokchai GP IEEE TI Evaluation of Fault-Tolerant Policies Using Simulation SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Various mechanisms for fault-tolerance (FT) are used today in order to reduce the impact of failures on application execution. In the case of system failure, standard FT mechanisms are checkpoint/restart (for reactive FT) and migration (for pro-active FT). However, each of these mechanisms create an overhead on application execution, overhead that for instance becomes critical on large-scale systems where previous studies have shown that applications may spend more time checkpointing state than performing useful work. In order to decrease this overhead, researchers try to both optimize existing FT mechanisms and implement new FT policies. For instance, combining reactive and pro-active approaches in order to decrease the number of checkpoints that must be performed during the application's execution. However, currently no solutions exist which enable the evaluation of these FT approaches through simulation, instead experimentations must be done using real platforms. This increases complexity and limits experimentation into alternate solutions. This paper presents a simulation framework that evaluates different FT mechanisms and policies. The framework uses system failure logs for the simulation with a default behavior based on logs taken from the ASCI White at Lawrence Livermore National Laboratory. We evaluate the accuracy of our simulator comparing simulated results with those taken from experiments done on a 32-node compute cluster. Therefore such a simulator can be used to develop new FT policies and/or to tune existing policies. C1 [Tikotekar, Anand; Vallee, Geoffroy; Naughton, Thomas; Scott, Stephen L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Leangsuksun, Chokchai] Louisiana Tech Univ, Ruston, LA 71272 USA. RP Tikotekar, A (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM tikotekaraa@ornl.gov; valleegr@ornl.gov; naughton@ornl.gov; scottsl@ornl.gov; box@latech.edu FU U.S. Department of Energy [DE-AC05-00OR22725] FX ORNLs work was supported by the U.S. Department of Energy, under Contract DE-AC05-00OR22725. NR 23 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 303 EP + DI 10.1109/CLUSTR.2007.4629244 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300034 ER PT B AU Gottumukkala, NR Leangsuksun, CB Taerat, N Nassar, R Scott, SL AF Gottumukkala, Narasimha Raju Leangsuksun, Chokchai Box Taerat, Narate Nassar, Raja Scott, Stephen L. GP IEEE TI Reliability-Aware Resource Allocation in HPC Systems SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Failures and downtimes have severe impact on the performance of parallel programs in a large scale High Performance Computing (HPC) environment. There were several research efforts to understand the failure behavior of computing systems. However, the presence of multitude of hardware and software components required for uninterrupted operation of parallel programs make failure and reliability prediction a challenging problem. HPC run-time systems like checkpoint frameworks and resource managers rely on the reliability knowledge of resources to minimize the performance loss due to unexpected failures. In this paper, we first analyze the Time Between Failure (TBF) distribution of individual nodes from a 512-node HPC system. Time varying distributions like Weibull, lognormal and gamma are observed to have better goodness-of-fit as compared to exponential distribution. We then present a reliability-aware resource allocation model for parallel programs based on one of the time varying distributions and present reliability-aware resource allocation algorithms to minimize the performance loss due to failures. We show the effectiveness of retiability-aware resource allocation algorithms based on the actual failure logs of the 512 node system and parallel workloads obtained from LANL and SDSC. The simulation results indicate that applying reliability-aware resource allocation techniques reduce the overall waste time of parallel jobs by as much as 30%. A further improvement by 15% in waste time is possible by considering the job run lengths in reliability-aware scheduling. C1 [Gottumukkala, Narasimha Raju; Leangsuksun, Chokchai Box; Taerat, Narate; Nassar, Raja] Louisiana Tech Univ, Coll Engn & Sci, Extreme Comp Res Grp, Ruston, LA 71270 USA. [Scott, Stephen L.] Oak Ridge Natl lab, Network & Cluster Comput Grp, Oak Ridge, TN 37830 USA. RP Gottumukkala, NR (reprint author), Louisiana Tech Univ, Coll Engn & Sci, Extreme Comp Res Grp, Ruston, LA 71270 USA. EM nrg003@latech.edu; box@latech.edu; nta008@latech.edu; nassar@latech.edu; scottsl@ornl.gov FU Department of Energy [DE-FG02-05ER25659]; Mathematics, Information and Computational Sciences Office; Office of Advanced Scientific Computing Research; Office of Science; U. S. Department of Energy with UT-Battelle, LLC [DE-AC05- 00OR22725] FX This research is supported by the Department of Energy Grant no: DE-FG02-05ER25659. and 2 by the Mathematics, Information and Computational Sciences Office, Office of Advanced Scientific Computing Research, Office of Science, U. S. Department of Energy, under contract No. DE-AC05- 00OR22725 with UT-Battelle, LLC. NR 18 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 312 EP + DI 10.1109/CLUSTR.2007.4629245 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300035 ER PT B AU Liu, YD Nassar, R Leangsuksun, C Naksinehaboon, N Paun, M Scott, S AF Liu, Yudan Nassar, Raja Leangsuksun, Chockchai (Box) Naksinehaboon, Nichamon Paun, Mihaela Scott, Stephen GP IEEE TI A Reliability-aware Approach for an Optimal Checkpoint/Restart Model in HPC Environments SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE ID INTERVAL; PLACEMENT; RECOVERY; ROLLBACK AB The increase in the physical size of High Performance Computing (HPC) platform makes system reliability more challenging. In order to minimize the performance loss due to unexpected failures or unnecessary overhead of fault tolerant mechanisms, we present a reliability-aware method for an optimal checkpoint/restart strategy towards minimizing rollback and checkpoint overheads. Our scheme aims to address fault tolerance challenge especially in a large-scale HPC system by providing optimal checkpoint placement techniques that are derived from the actual system reliability. Unlike existing checkpoint models, which can only handle Poisson failure and a constant checkpoint interval, our model can perform a varying checkpoint interval and deal with different failure distributions. In addition, the approach considers optimality for both checkpoint overhead and rollback time. Our validation results suggest a significant improvement over existing techniques. C1 [Liu, Yudan; Nassar, Raja; Leangsuksun, Chockchai (Box); Naksinehaboon, Nichamon; Paun, Mihaela] Louisiana Tech Univ, Coll Engn & Sci, Ruston, LA 71270 USA. [Scott, Stephen] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Liu, YD (reprint author), Louisiana Tech Univ, Coll Engn & Sci, Ruston, LA 71270 USA. EM yli010@latech.edu; nassar@latech.edu; box@latech.edu; nna003@latech.edu; mpaun@latech.edu; scotts1@ornl.gov RI Paun, Mihaela/C-3539-2011 OI Paun, Mihaela/0000-0002-3342-9140 FU Department of Energy [DE-FG02-05ER25659]; Mathematics, Information and Computational Sciences Office; Office of Advanced Scientific Computing Research, Office of Science; U. S. Department of Energy [DE-AC05-00OR22725]; UT-Battelle, LLC FX Research supported by the Department of Energy Grant no: DE-FG02-05ER25659.; Research supported by the Mathematics, Information and Computational Sciences Office, Office of Advanced Scientific Computing Research, Office of Science, U. S. Department of Energy, under contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. NR 21 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 452 EP + DI 10.1109/CLUSTR.2007.4629264 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300054 ER PT B AU Curtis-Maury, M Singh, K Mckee, SA Blagojevic, F Nikolopoulos, DS de Supinski, BR Schulz, M AF Curtis-Maury, Matthew Singh, Karan McKee, Sally A. Blagojevic, Filip Nikolopoulos, Dimitrios S. de Supinski, Bronis R. Schulz, Martin GP IEEE TI Identifying Energy-Efficient Concurrency Levels Using Machine Learning SO 2007 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING LA English DT Proceedings Paper CT IEEE International Conference on Cluster Computing CY SEP 17-20, 2007-2008 CL Austin, TX SP IEEE AB Multicore microprocessors have been largely motivated by the diminishing returns in performance and the increased power consumption of single-threaded ILP microprocessors. With the industry already shifting from multicore to many-core microprocessors, software developers must extract more thread-level parallelism from applications. Unfortunately, low power-efficiency and diminishing returns in performance remain major obstacles with many cores. Poor interaction between software and hardware, and bottlenecks in shared hardware structures often prevent scaling to many cores, even in applications where a high degree of parallelism is potentially available. In some cases, throwing additional cores at a problem may actually harm performance and increase power consumption. Better use of otherwise limitedly beneficial cores by software components such as hypervisors and operating systems can improve system-wide performance and reliability, even in cases where power consumption is not a main concern. In response to these observations, we evaluate an approach to throttle concurrency in parallel programs dynamically. We throttle concurrency to levels with higher predicted efficiency from both performance and energy standpoints, and we do so via machine learning, specifically artificial neural networks (ANNs). One advantage of using ANNs over similar techniques previously explored is that the training phase is greatly simplified, thereby reducing the burden on the end user. Using machine learning in the context of concurrency throttling is novel. We show that ANNs are effective for identifying energy-efficient concurrency levels in multithreaded scientific applications, and we do so using physical experimentation on a state-of-the-art quad-core Xeon platform. C1 [Curtis-Maury, Matthew; Blagojevic, Filip; Nikolopoulos, Dimitrios S.] Virginia Tech, Dept Comp Sci, Blacksburg, VA 24061 USA. [Singh, Karan; McKee, Sally A.] Cornell Univ, Comp Syst Lab, Ithaca, NY 14853 USA. [Curtis-Maury, Matthew; Singh, Karan; de Supinski, Bronis R.; Schulz, Martin] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Curtis-Maury, M (reprint author), Virginia Tech, Dept Comp Sci, Blacksburg, VA 24061 USA. EM mfcurt@cs.vt.edu; karan@csl.cornell.edu; sam@csl.cornell.edu; filip@cs.vt.edu; dsn@cs.vt.edu; bronis@llnl.gov; schulzm@llnl.gov FU U.S Department of Energy; University of California Lawrence Livermore National Laboratory [W-7405-Eng-48 (UCRL-CONF-233024)] FX This work was performed under the auspices of the U.S. Department of Energy by University of California Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48 (UCRL-CONF-233024). NR 17 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1387-4 PY 2007 BP 488 EP + DI 10.1109/CLUSTR.2007.4629274 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BIQ16 UT WOS:000261875300064 ER PT S AU Ramaswamy, V Cuellar, L Eidenbenz, S Hengartner, N AF Ramaswamy, Venkatesh Cuellar, Leticia Eidenbenz, Stephan Hengartner, Nicolas GP IEEE TI Preventing bandwidth abuse at the router through sending rate estimate-based Active Queue Management SO 2007 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-14 SE IEEE International Conference on Communications LA English DT Proceedings Paper CT IEEE International Conference on Communications (ICC 2007) CY JUN 24-28, 2007 CL Glasgow, SCOTLAND SP IEEE AB We propose a rigorous mathematical interpretation of a novel family of Active Queue Management schemes, called Sending Rate Estimate based Queue Management (SREQM) scheme, that aims to provide fair bandwidth allocation to all the flows in a router by estimating the flow sending rates, while maintaining only minimal per-flow state information. We propose an optimized implementation of SREQM, called Fair Sending Rate Estimate based Queue Management (FSREQM) scheme, and show through comparative simulation that FRESQM is the only scheme among those tested that successfully prevents bandwidth abuse while maintaining high link utilization. C1 [Ramaswamy, Venkatesh; Cuellar, Leticia; Eidenbenz, Stephan; Hengartner, Nicolas] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ramaswamy, V (reprint author), Los Alamos Natl Lab, POB 1663,MS M997, Los Alamos, NM 87545 USA. EM vramaswa@lanl.gov; leticia@lanl.gov; eidenben@lanl.gov; nickh@lanl.gov NR 10 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1550-3607 BN 978-1-4244-0352-3 J9 IEEE ICC PY 2007 BP 569 EP 574 DI 10.1109/ICC.2007.99 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BIA16 UT WOS:000257882500090 ER PT S AU Chang, H Yang, Q Auer, M Parvin, B AF Chang, Hang Yang, Qing Auer, Manfred Parvin, Bahram GP IEEE TI Modeling of front evolution with graph cut optimization SO 2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7 SE IEEE International Conference on Image Processing ICIP LA English DT Proceedings Paper CT IEEE International Conference on Image Processing (ICIP 2007) CY SEP 16-19, 2007 CL San Antonio, TX SP IEEE DE image segmentation; image color analysis; image texture analysis AB In this paper, we present a novel active contour model, in which the traditional gradient descent optimization is replaced by graph cut optimization. The basic idea is to first define an energy function according to curve evolution and then construct a graph with well selected edge weights based on the objective energy function, which is further optimized via graph cut algorithm. In this fashion, our model shares advantages of both level set method and graph cut algorithm, which are "topological" invariance, computational efficiency, and immunity to being stuck in the local minima. The model is validated on synthetic images, applied to two-class segmentation problem, and compared with the traditional active contour to demonstrate effectiveness of the technique. Finally, the method is applied to samples imaged with transmission electron microscopy that demonstrate complex textured patterns corresponding subcellular regions and micro-anatomy. C1 [Chang, Hang; Auer, Manfred; Parvin, Bahram] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Yang, Qing] Chinese Acad Sci, Inst Automat, Beijing, Peoples R China. RP Chang, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. FU OFFICE OF ENERGY SCIENCE RESEARCH; LIFE SCIENCES OF THE U. S. DEPARTMENT OF ENERGY; NATIONAL INSTITUTE OF HEALTH [DE-AC03-76SF00098]; THE UNIVERSITY OF CALIFORNIA FX THIS WORK IS SUPPORTED IN PART BY THE DIRECTOR, OFFICE OF ENERGY SCIENCE RESEARCH, LIFE SCIENCES OF THE U. S. DEPARTMENT OF ENERGY, AND NATIONAL INSTITUTE OF HEALTH UNDER CONTRACT NO. DE-AC03-76SF00098 WITH THE UNIVERSITY OF CALIFORNIA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-4880 BN 978-1-4244-1436-9 J9 IEEE IMAGE PROC PY 2007 BP 241 EP + PG 3 WC Engineering, Electrical & Electronic; Imaging Science & Photographic Technology SC Engineering; Imaging Science & Photographic Technology GA BHJ22 UT WOS:000253487200061 ER PT S AU Chartrand, R AF Chartrand, Rick GP IEEE TI Nonconvex regularization for shape preservation SO 2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7 SE IEEE International Conference on Image Processing ICIP LA English DT Proceedings Paper CT IEEE International Conference on Image Processing (ICIP 2007) CY SEP 16-19, 2007 CL San Antonio, TX SP IEEE DE image reconstruction; image edge analysis; image shape analysis AB We show that using a nonconvex penalty term to regularize image reconstruction can substantially improve the preservation of object shapes. The commonly-used total-variation regularization, integral vertical bar del u vertical bar, penalizes the length of object edges. We show that integral vertical bar del vertical bar(p), 0 < p < 1, only penalizes edges of dimension at least 2 - p, and thus finite-length edges not at all. We give numerical examples showing the resulting improvement in shape preservation. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chartrand, R (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM rickc@lanl.gov NR 3 TC 8 Z9 8 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-4880 BN 978-1-4244-1436-9 J9 IEEE IMAGE PROC PY 2007 BP 293 EP 296 PG 4 WC Engineering, Electrical & Electronic; Imaging Science & Photographic Technology SC Engineering; Imaging Science & Photographic Technology GA BHJ22 UT WOS:000253487200074 ER PT S AU Murray, W Paul, VR Pattichis, MS AF Murray, Victor Paul, Rodriguez V. Pattichis, Marios S. GP IEEE TI Robust multiscale AM-FM demodulation of digital images SO 2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7 SE IEEE International Conference on Image Processing ICIP LA English DT Proceedings Paper CT IEEE International Conference on Image Processing (ICIP 2007) CY SEP 16-19, 2007 CL San Antonio, TX SP IEEE DE multidimensional demodulation; multidimensional amplitude modulation; multidimensional frequency; modulation AB In this paper, we introduce new multiscale AM-FM demodulation algorithms that provide significant improvements in accuracy over previously reported approaches. The improvements are due to the use of new filterbanks based on separable filters supported in just two quadrants. The QEA, robust-QEA and Vakman methods are improved with this new filterbanks. A number of 2-D AM-FM examples are presented, where we observe significant accuracy improvements. For Lena, the mean-square-error for the AM-FM harmonic reconstruction is reduced by 88.31%. Similarly, for a AM-FM synthetic example of sinusoidal phase and Gaussian amplitude, the mean-square-error is reduced by: (i) 70.86% for the reconstruction, (ii) 99.66% for the instantaneous amplitude and (iii) 96.52% for the sinusoidal instantaneous frequency component. C1 [Murray, Victor; Pattichis, Marios S.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA. [Paul, Rodriguez V.] Los Alamos Natl Lab, Theoret Div, MS B28, T7, Los Alamos, NM 87545 USA. RP Murray, W (reprint author), Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA. EM vmurray@ieee.org; prodrig@istec.org; pattichis@ece.unm.edu NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-4880 BN 978-1-4244-1436-9 J9 IEEE IMAGE PROC PY 2007 BP 465 EP + PG 3 WC Engineering, Electrical & Electronic; Imaging Science & Photographic Technology SC Engineering; Imaging Science & Photographic Technology GA BHJ22 UT WOS:000253487200117 ER PT S AU Bagherjeiran, A Love, NS Kamath, C AF Bagherjeiran, Abraham Love, Nicole S. Kamath, Chandrika GP IEEE TI Estimating missing features to improve multimedia retrieval SO 2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7 SE IEEE International Conference on Image Processing ICIP LA English DT Proceedings Paper CT IEEE International Conference on Image Processing (ICIP 2007) CY SEP 16-19, 2007 CL San Antonio, TX SP IEEE DE multimedia information retrieval; text and image mining AB Retrieval in a multimedia database usually involves combining information from different modalities of data, such as text and images. However, all modalities of the data may not be available to form the query. The results from such a partial query are often less than satisfactory. In this paper, we present an approach to complete a partial query by estimating the missing features in the query. Our experiments with a database of images and their associated captions show that, with an initial text-only query, our completion method has similar performance to a full query with both image and text features. In addition, when we use relevance feedback, our approach outperforms the results obtained using a full query. C1 [Bagherjeiran, Abraham; Love, Nicole S.; Kamath, Chandrika] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Bagherjeiran, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-4880 BN 978-1-4244-1436-9 J9 IEEE IMAGE PROC PY 2007 BP 797 EP 800 PG 4 WC Engineering, Electrical & Electronic; Imaging Science & Photographic Technology SC Engineering; Imaging Science & Photographic Technology GA BHJ22 UT WOS:000253487200200 ER PT S AU Kamath, C Miller, PL AF Kamath, Chandrika Miller, Paul L. GP IEEE TI Image analysis for validation of simulations of a fluid mix problem SO 2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7 SE IEEE International Conference on Image Processing ICIP LA English DT Proceedings Paper CT IEEE International Conference on Image Processing (ICIP 2007) CY SEP 16-19, 2007 CL San Antonio, TX SP IEEE DE code validation; experimental images; denoising; feature extraction; image analysis AB As computer simulations gain acceptance for the modeling of complex physical phenomena, there is an increasing need to validate these simulation codes by comparing them to experiments. Currently, this is done qualitatively, using a visual approach. This is obviously very subjective and more quantitative metrics are needed, especially to identify simulations which are closer to experiments than other simulations. In this paper, we show how image processing techniques can be effectively used in such comparisons. Using an example from the problem of mixing of two fluids, we show that we can quantitatively compare experimental and simulation images by extracting higher level features to characterize the objects in the images. C1 [Kamath, Chandrika; Miller, Paul L.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Kamath, C (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RI Miller, Paul/E-6880-2013 NR 5 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1522-4880 BN 978-1-4244-1436-9 J9 IEEE IMAGE PROC PY 2007 BP 1653 EP 1656 PG 4 WC Engineering, Electrical & Electronic; Imaging Science & Photographic Technology SC Engineering; Imaging Science & Photographic Technology GA BHJ22 UT WOS:000253487201173 ER PT B AU Derr, KW AF Derr, Kurt W. GP IEEE TI Nightmares with mobile devices are just around the corner! SO 2007 IEEE INTERNATIONAL CONFERENCE ON PORTABLE INFORMATION DEVICES LA English DT Proceedings Paper CT 1st IEEE International Conference on Portable Information Devices CY MAR 25-29, 2007 CL Orlando, FL SP IEEE Tech Activities Board, NTDC, IEEE Components, Mfg Technol Soc, IEEE Broadcast Technol Soc, IEEE Commun Soc, IEEE Elect Devices Soc, IEEE Engn Med & Biol Soc, IEEE Vehicular Technol Soc, Univ Calif. Santa Cruz AB Mobile Computing Devices (MCDs) such as Personal Digital Assistants (PDAs), smart phones, handheld personal computers, and Tablet PCs, are proliferating in the marketplace. As MCDs become more powerful and commonplace with ubiquitous connectivity, the line that currently divides these handheld devices from typical network computers will become very unclear. Bluetooth, WiFi, and cellular technologies interconnect mobile devices with other computing devices and represent vectors into the device that may be exploited by malicious persons. A malicious person can theoretically take complete control of a mobile device vi. a wireless and use it for all kinds of illicit purposes. While some malicious codes have been reported in the literature for these devices, it is only a matter of time before these codes become as common on mobile devices as they arc, on desktop computers. Most people have had an experience with a virus on their desktop PC, but have not had the same experience on their smart phone. This will change. The INL is conducting research into MCD vulnerabilities and countermeasures and has developed a web-based client server application for tracking this data. These efforts are described in this paper. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Derr, KW (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1038-5 PY 2007 BP 68 EP 72 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHE29 UT WOS:000252427600014 ER PT B AU Duffy, M AF Duffy, Michael GP IEEE TI Systems integration and the department of energy's Hydrogen Program SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE International Conference on System of Systems Engineering CY APR 16-18, 2007 CL San Antonio, TX SP IEEE DE systems integration; integrated baseline; Hydrogen Program; CORE AB The Department of Energy (DOE) established the Hydrogen Program in response to a Presidential directive. The role of the Hydrogen Program is not to build the nation's hydrogen infrastructure, but instead to develop and validate technologies that will enable industry to make commercialization decisions that lead to establishing and evolving a national hydrogen infrastructure. To provide a solid foundation for a mission-driven Program consistent with the President's directive, the DOE asked the National Renewable Energy Laboratory to establish a Systems Integration Office (SIO) and develop an Integrated Baseline that could be used to effectively and efficiently manage the Hydrogen Program. The SIO has employed a structured process, based on hierarchical decomposition, to identify, define, and analyze the requirements and tasks needed to satisfy the Hydrogen Program's mission. The result is an on-line integrated baseline (i.e., both technical and programmatic considerations) that ensures that these mission requirements and all aspects of the President's directive are addressed. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Duffy, M (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1159-7 PY 2007 BP 235 EP 241 PG 7 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH57 UT WOS:000253304300040 ER PT B AU Garrett, BA AF Garrett, Bobi A. GP IEEE TI Evolving the nation's energy infrastructure: A challenging system issue for the twenty-first century SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE International Conference on System of Systems Engineering CY APR 16-18, 2007 CL San Antonio, TX SP IEEE AB Over the next several decades, a profound transformation of the global energy enterprise will occur driven largely by population growth and economic development. How this growing demand for energy is met poses one of the most complex and challenging issues of our time. The current national energy dialogue reflects the challenge in simultaneously considering the social, political, economic, and technical issues as the energy system is defined, technical targets are established, and programs and investments are implemented to meet those technical targets. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Garrett, BA (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1159-7 PY 2007 BP 242 EP 247 PG 6 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH57 UT WOS:000253304300041 ER PT B AU Phillips, LR AF Phillips, Laurence R. GP IEEE TI Managing microgrids using grid services SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE International Conference on System of Systems Engineering CY APR 16-18, 2007 CL San Antonio, TX SP IEEE DE agent; cooperative systems; energy management system; EMS; intelligent control; microgrid; web services AB In order for electric power generating capacity to be supplanted to a meaningful extent by sources smaller than 200 kW, an automated means of managing systems of small sources must be found or their sheer number will overwhelm the power production community. Microgrids-power systems comprising multiple small interconnected generators-are a promising response to this need, but an automated microgrid management system has not been demonstrated. This paper describes the energy management task and its execution in a standardized grid services environment. C1 Sandia Natl Labs, Crit Infrastruct Syst Dept, Albuquerque, NM 87185 USA. RP Phillips, LR (reprint author), Sandia Natl Labs, Crit Infrastruct Syst Dept, POB 5800, Albuquerque, NM 87185 USA. EM lrphill@sandia.gov NR 28 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1159-7 PY 2007 BP 303 EP 307 PG 5 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH57 UT WOS:000253304300051 ER PT B AU Cameron, C Cornelius, C AF Cameron, Christopher Cornelius, Craig GP IEEE TI A systems-driven approach to solar energy R&D SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE International Conference on System of Systems Engineering CY APR 16-18, 2007 CL San Antonio, TX SP IEEE DE solar energy; program management; modeling AB The Department of Energy (DOE) Office of Solar Energy Technologies uses a systems-driven approach to program management. The approach uses market analysis, modeling, and test and evaluation to prioritize research needs and assess progress. For each target market application, a reference system design is developed. Parametric analysis of the reference design is used to identify technology improvement opportunities that will lead to lower levelized cost of energy. Multiple technology pathways, where appropriate, are used to reduce risk. A formal stage-gate management process is used to determine when research activities should be graduated to the next stage or should be terminated due to insufficient progress. C1 [Cameron, Christopher] Sandia Natl Labs, Solar Syst Dept, POB 5800, Albuquerque, NM 87185 USA. [Cornelius, Craig] US DOE, Solar Energy Technol Program, Washington, DC USA. RP Cameron, C (reprint author), Sandia Natl Labs, Solar Syst Dept, POB 5800, Albuquerque, NM 87185 USA. EM cpcamer@sandia.gov; Craig.Cornelius@ee.doe.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1159-7 PY 2007 BP 336 EP + PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH57 UT WOS:000253304300057 ER PT B AU Riley, C Wooley, R Sandor, D AF Riley, Cynthia Wooley, Robert Sandor, Debra GP IEEE TI Implementing systems engineering in the US Department of Energy Office of the Biomass Program SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEM OF SYSTEMS ENGINEERING, VOLS 1 AND 2 LA English DT Proceedings Paper CT IEEE International Conference on System of Systems Engineering CY APR 16-18, 2007 CL San Antonio, TX SP IEEE DE biofuels; biomass; bioenergy; biorefinery; cellulosic ethanol; biomass-to-biofuels supply chain; energy system dynamics modeling; stage gate management AB The DOE Biomass Program is tackling the challenge of advancing biomass energy technologies and systems from concept to commercial adoption with a goal of enabling the production and use of biofuels to help reduce future U.S. oil consumption. The complexity of the biomass-to-biofucis system of systems and the combined dynamics of the existing agriculture, forestry, energy and transportation markets within which it operates pose challenges for reaching consensus on both a concept of operations and preferred strategies for transitioning to a significantly larger biofuels industry that is secure, reliable, environmentally responsible, and supportive of a thriving economy. To ensure that the program is focused on the activities critical to achieving its goal, the program is implementing systems engineering processes, practices, and tools to guide informed decision-making. C1 [Riley, Cynthia; Wooley, Robert; Sandor, Debra] Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Riley, C (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1159-7 PY 2007 BP 361 EP 365 PG 5 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BHH57 UT WOS:000253304300061 ER PT S AU Bi, WY Dunn, J McCorkle, S Gabriel, R Lewis, W AF Bi, Wenyi Dunn, John McCorkle, Sean Gabriel, Reginald Lewis, Walter GP IEEE TI Identify the gene positions of methylated DNA with a database approach SO 2007 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS, VOLS 1-8 SE IEEE International Conference on Systems Man and Cybernetics Conference Proceedings LA English DT Proceedings Paper CT IEEE International Conference on Systems, Man and Cybernetics CY OCT 07-10, 2007 CL Montreal, COOK ISLANDS SP IEEE DE DNA; methylation; CpG islands ID HUMAN CANCER; HUMAN GENOME; SITES AB Determining the global pattern of DNA methylation, or the methylome and its variation in cells has become an area of considerable interest primarily because of its potential use as an early diagnostic biomarker for cancers. Genome survey techniques are now being used to identify heavily methylated regions on a massive scale and there is a need to correlate this data with focused biomedical information in a high-throughput manner. Towards this end, we present a database which combines genomic location of methylation sites, genes, CpG islands with specialized genetic-ontological resources which allow for large scale comprehensive presentations of utility to researchers. C1 [Bi, Wenyi; Gabriel, Reginald; Lewis, Walter] Cheyney Univ Penn, Dept Comp Sci, Cheyney, PA 19319 USA. [Dunn, John; McCorkle, Sean] Brookhaven Natl Lab, Dept Biol, US DOE, Upton, NY USA. RP Bi, WY (reprint author), Cheyney Univ Penn, Dept Comp Sci, Cheyney, PA 19319 USA. EM wbi@cheyney.edu; jdunn@bnl.gov; mccorkle@bnl.gov; rgabriel@cheyney.edu; wjlewis@cheyney.edu NR 15 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1062-922X BN 978-1-4244-0990-7 J9 IEEE SYS MAN CYBERN PY 2007 BP 1 EP + PG 3 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics; Engineering, Electrical & Electronic SC Automation & Control Systems; Computer Science; Engineering GA BHP06 UT WOS:000255016300001 ER PT B AU Banerjee, B AF Banerjee, Bakul GP IEEE TI Managing Government Funded Scientific Consortia SO 2007 IEEE INTERNATIONAL ENGINEERING MANAGEMENT CONFERENCE LA English DT Proceedings Paper CT IEEE International Engineering Management Conference CY JUL 29-AUG 01, 2007 CL Lost Pines, TX SP IEEE DE Collaborative work; Computer system; Project management; Science AB In recent years, it is becoming apparent that good science not only requires the talents of individual scientists, but also state-of-the-art laboratory facilities. These faculties, often costing millions to billions of dollars, allow scientists unprecedented opportunities to advance their knowledge and improve the quality of human life. To make optimum use of these experimental facilities, a significant amount of computational simulations is required. These mega-projects require large-scale computational facilities and complementary infrastructures of network and software. For physical sciences in US, most of these research and development efforts are funded by the US Department of Energy (DOE) and National Science Foundation (NSF). Universities, US National Laboratories, and occasionally industrial partners work together on projects awarded with different flavors of government funds managed under different rules. At Fermi lab, we manage multiple such collaborative computing projects for university and laboratory consortia. In this paper, I explore important lessons learned from my experience with these projects. Using examples of projects delivering computing infrastructure for the Lattice QCD Collaboration, I explain how the use of federal enterprise architecture may be deployed to run projects effectively. I also describe the lessons learned in the process. Lessons learned from the execution of the above projects are also applicable to other consortia receiving federal government funds. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Banerjee, B (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM bakulb@fnal.gov NR 3 TC 0 Z9 0 U1 2 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-2145-9 PY 2007 BP 171 EP 175 PG 5 WC Engineering, Electrical & Electronic SC Engineering GA BOZ34 UT WOS:000278100300027 ER PT S AU Cole, EI Johnston, A AF Cole, Edward I., Jr. Johnston, Allan GP IEEE TI Beam-based defect localization in ICs SO 2007 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT SE IEEE International Integrated Reliability Workshop Final Report LA English DT Proceedings Paper CT IEEE International Integrated Reliability Workshop CY OCT 15-18, 2007 CL S Lake Tahoe, CA SP IEEE C1 [Cole, Edward I., Jr.] Sandia Natl Labs, Livermore, CA 94550 USA. RP Cole, EI (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1930-8841 BN 978-1-4244-1171-9 J9 INT INTEG REL WRKSP PY 2007 BP 152 EP 152 PG 1 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BHL73 UT WOS:000254145100036 ER PT S AU Budiman, AS Hau-Riege, CS Besser, PR Marathe, A Joo, YC Tamura, N Patel, JR Nix, WD AF Budiman, A. S. Hau-Riege, C. S. Besser, P. R. Marathe, A. Joo, Y. -C. Tamura, N. Patel, J. R. Nix, W. D. GP IEEE TI Plasticity-amplified diffusivity: Dislocation cores as fast drffusion paths in cu interconnects SO 2007 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM PROCEEDINGS - 45TH ANNUAL SE International Reliability Physics Symposium LA English DT Proceedings Paper CT 45th Annual IEEE International Reliability Physics Symposium CY APR 15-19, 2007 CL Phoenix, AZ SP IEEE DE electromigration; dislocation core; plasticity; reliability assessment ID ELECTROMIGRATION; LINES; FILMS AB The mass transport of Cu during electromigration (EM) testing is typically dominated by interface diffusion. If a mechanism other than interface diffusion begins to affect the overall transport process, then the effective diffusivity, D, of the EM process would deviate from that of interface diffusion only. This would have fundamental implications. We have preliminary evidence that this might be the case, and we report its implications for EM lifetime assessment in this manuscript. C1 [Budiman, A. S.; Patel, J. R.; Nix, W. D.] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. [Hau-Riege, C. S.; Besser, P. R.; Marathe, A.] Adv Micro Devices Inc, Sunnyvale, CA USA. [Joo, Y. -C.] Seoul Natl Univ, Dept Mat Sci, Seoul, South Korea. [Tamura, N.; Patel, J. R.] Lawrence Berkeley Natl Lab, ALS, Berkeley, CA 94720 USA. RP Budiman, AS (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. FU Advanced Micro Devices (AMD); U.S. Department of Energy, Office of Basic Energy Sciences [DE-FG02-04ER46163]; Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231] FX The authors would like to thank Advanced Micro Devices (AMD) for generous support and sample assistance. One of the authors (ASB) more specifically would like to thank John M. Ennals, AMD/SRC Program Manager, Technology Research Group, AMD, for the opportunity of a Summer Internship Program in 2006. Both ASB and WDN gratefully acknowledge support by the U.S. Department of Energy, Office of Basic Energy Sciences through Grant No. (DE-FG02-04ER46163). The Advanced Light Source (ALS) is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 at the Ernest Orlando Lawrence Berkeley National Laboratory (LBNL). ASB would also like to acknowledge Jun He of Intel Corporation for valuable discussions during the 2006 Gordon Research Conference (GRC) on Thin Film and Small Scale Mechanical Behavior. NR 11 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1541-7026 BN 978-1-4244-0918-1 J9 INT RELIAB PHY SYM PY 2007 BP 122 EP + DI 10.1109/RELPHY.2007.369880 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Physics, Condensed Matter SC Computer Science; Engineering; Physics GA BGH49 UT WOS:000246989600021 ER PT S AU Shaheen, SE AF Shaheen, S. E. GP IEEE TI Mechanisms of operation and degradation in solution-processable organic photovoltaics SO 2007 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM PROCEEDINGS - 45TH ANNUAL SE International Reliability Physics Symposium LA English DT Proceedings Paper CT 45th Annual IEEE International Reliability Physics Symposium CY APR 15-19, 2007 CL Phoenix, AZ SP IEEE DE organic; polymer; photovoltaic; solar power conversion; fullerene; exciton; solution-processable ID LIGHT-EMITTING-DIODES; PLASTIC SOLAR-CELLS; POLYMER; EFFICIENCY; STABILITY; DEVICES; MORPHOLOGY; INTERFACE; BLENDS; FILMS AB Organic photovoltaic devices are being intensely researched as a low-cost solar power conversion technology. In general, reliability and degradation mechanisms for these devices have not been examined by researchers in detail, however recent efficiency gains justify more concerted efforts toward achieving commercially viable device lifetimes. The molecular nature of these materials and the atmospheric processing techniques used for their fabrication provide for potentially low cost production. These aspects also bring with them unique challenges in achieving stable device performance. In this paper, I provide a brief description of the operational mechanisms of these devices, and I outline what is known about the mechanisms of degradation and the device lifetimes. C1 [Shaheen, S. E.] Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80203 USA. RP Shaheen, SE (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80203 USA. RI Shaheen, Sean/M-7893-2013 NR 39 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1541-7026 BN 978-1-4244-0918-1 J9 INT RELIAB PHY SYM PY 2007 BP 248 EP + DI 10.1109/RELPHY.2007.369900 PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic; Physics, Condensed Matter SC Computer Science; Engineering; Physics GA BGH49 UT WOS:000246989600041 ER PT S AU Pinar, A Reichert, A Lesieutre, B AF Pinar, Ali Reichert, Adam Lesieutre, Bernard GP IEEE TI Computing criticality of lines in power systems SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11 SE IEEE International Symposium on Circuits and Systems LA English DT Proceedings Paper CT IEEE International Symposium on Circuits and Systems CY MAY 27-30, 2007 CL New Orleans, LA SP IEEE ID TERRORIST THREAT AB We propose a computationally efficient method based on nonlinear optimization to identify critical lines, failure of which can cause severe blackouts. Our method computes criticality measure for all lines at a time, as opposed to detecting a single vulnerability, providing a global view of the system. This information on criticality of lines can be used to identify multiple contingencies by selectively exploring multiple combinations of broken lines. The effectiveness of our method is demonstrated on the IEEE 30 and 118 bus systems, where we can quickly detect the most critical lines and identify severe multiple contingencies. C1 [Pinar, Ali] Univ Calif Berkeley, Lawrence Berkeley Lab, Comp Res Div, Berkeley, CA 94720 USA. [Reichert, Adam] Univ Illinois, Dept Comp Sci, 1304 W Springfield Ave, Urbana, IL 61801 USA. [Lesieutre, Bernard] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm & Energy Tech Div, Berkeley, CA 94720 USA. RP Pinar, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Comp Res Div, Berkeley, CA 94720 USA. EM apinar@lbl.gov; areiche2@uiuc.edu; BCLesieutre@lbl.gov FU US Department of Energy [DE-AC03-76SF00098] FX We would like to thank Vaibhav Donde, Chao Yang, and Juan Meza for fruitful discussions. This work was supported by the Director, Office of Science, Division of Mathematical, Information, and Computational Sciences of U.S. Department of Energy under contract DE-AC03-76SF00098. NR 9 TC 5 Z9 5 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0271-4302 BN 978-1-4244-0920-4 J9 IEEE INT SYMP CIRC S PY 2007 BP 65 EP + DI 10.1109/ISCAS.2007.378183 PG 2 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Engineering, Biomedical; Engineering, Electrical & Electronic; Mathematical & Computational Biology; Nanoscience & Nanotechnology; Imaging Science & Photographic Technology; Telecommunications SC Computer Science; Engineering; Mathematical & Computational Biology; Science & Technology - Other Topics; Imaging Science & Photographic Technology; Telecommunications GA BGZ68 UT WOS:000251608400017 ER PT S AU Olsson, RH Keeler, BEN Czaplewski, DA Carr, DW AF Olsson, Roy H., III Keeler, Bianca E. N. Czaplewski, David A. Carr, Dustin W. GP IEEE TI Circuit techniques for reducing low frequency noise in optical MEMS position and inertial sensors SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11 SE IEEE International Symposium on Circuits and Systems LA English DT Proceedings Paper CT IEEE International Symposium on Circuits and Systems CY MAY 27-30, 2007 CL New Orleans, LA SP IEEE AB This paper reports a MEMS displacement sensor with a sensitivity of 50fm/root Hz at frequencies as low as 10 mHz. The sensor is composed of a near-field optical nanograting that modulates the reflectivity of incident light by 10%/nm. A reference detection low noise readout circuit has been designed that cancels laser relative intensity noise (RIN) to frequencies as low as 0.7 Hz. The low frequency bandwidth of the position sensing microsystem is further reduced to below 10 mHz using a new MEMS correlated double sampling technique that cancels low frequency RIN, drift, and circuit 1/f noise by greater than 77 dB. C1 [Olsson, Roy H., III; Keeler, Bianca E. N.; Czaplewski, David A.] Sandia Natl Labs, Adv MEMS Technol Dept, POB 5800, Albuquerque, NM 87185 USA. [Carr, Dustin W.] Symphony Acoust Inc, Albuquerque, NM USA. RP Olsson, RH (reprint author), Sandia Natl Labs, Adv MEMS Technol Dept, POB 5800, Albuquerque, NM 87185 USA. EM rholsso@sandia.gov FU Laboratory Directed Research and Development (LDRD); United States Department of Energys National Nuclear Security Administration [DE-AC04-94AL85000] FX This work was supported by the Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories. Sandia National Laboratories is a multiprogram laboratory operated by the Sandia Corporation, Lockheed Martin Company, for the United States Department of Energys National Nuclear Security Administration under contract DE-AC04-94AL85000. NR 6 TC 3 Z9 3 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0271-4302 BN 978-1-4244-0920-4 J9 IEEE INT SYMP CIRC S PY 2007 BP 2391 EP + DI 10.1109/ISCAS.2007.377941 PG 2 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Engineering, Biomedical; Engineering, Electrical & Electronic; Mathematical & Computational Biology; Nanoscience & Nanotechnology; Imaging Science & Photographic Technology; Telecommunications SC Computer Science; Engineering; Mathematical & Computational Biology; Science & Technology - Other Topics; Imaging Science & Photographic Technology; Telecommunications GA BGZ68 UT WOS:000251608403050 ER PT B AU Chernyak, VY Chertkov, N AF Chernyak, Vladimir Y. Chertkov, Michael GP IEEE TI Loop Calculus and Belief Propagation for q-ary alphabet: Loop tower SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-7 LA English DT Proceedings Paper CT IEEE International Symposium on Information Theory CY JUN 24-29, 2007 CL Nice, FRANCE SP IEEE AB Loop Calculus introduced in [1], [2] constitutes a new theoretical tool that explicitly expresses the symbol Maximum-A-Posteriori (MAP) solution of a general statistical inference problem via a solution of the Belief Propagation (BP) equations. This finding brought a new significance to the BP concept, which in the past was thought of as just a loop-free approximation. In this paper we continue a discussion of the Loop Calculus. We introduce an invariant formulation which allows to generalize the Loop Calculus approach to a q-are alphabet. C1 [Chernyak, Vladimir Y.] Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA. [Chertkov, Michael] Ctr Nonlinear Studies, Div Theoret, LANL, Los Alamos, NM 87545 USA. RP Chernyak, VY (reprint author), Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA. EM chernyak@chem.wayne.edu; chertkov@lanl.gov RI Chertkov, Michael/O-8828-2015; Chernyak, Vladimir/F-5842-2016 OI Chernyak, Vladimir/0000-0003-4389-4238 FU National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]; ayne State University FX The work at Los Alamos was carried out under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396. VYC also acknowledges the support through the start-up grant from Wayne State University. NR 6 TC 5 Z9 5 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1397-3 PY 2007 BP 316 EP + DI 10.1109/ISIT.2007.4557245 PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHW32 UT WOS:000257010200064 ER PT B AU Santhi, N AF Santhi, Nandakishore GP IEEE TI On algebraic decoding of q-ary Reed-Muller and product Reed-Solomon codes SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-7 LA English DT Proceedings Paper CT IEEE International Symposium on Information Theory CY JUN 24-29, 2007 CL Nice, FRANCE SP IEEE AB We consider a list decoding algorithm recently proposed by Pellikaan-Wu [8] for q-ary Reed-Muller codes R M-q(l, m, n) of length n <= q(m) when l <= q. A simple and easily accessible correctness proof is given which shows that this algorithm achieves a relative error-correction radius of tau <= (1 - root l(q)(m-1)/n). This is an improvement over the proof using one-point Algebraic-Geometric codes given in [8]. The described algorithm can be adapted to decode Product-Reed-Solomon codes. We then propose a new low complexity recursive algebraic decoding algorithm for Reed-Muller and Product-Reed-Solomon codes. Our algorithm achieves a relative error correction radius of tau <= Pi(m)(i=1)(1 - root k(i)/q) This technique is then proved to outperform the Pellikaan-Wu method in both complexity and error correction radius over a wide range of code rates. C1 LANL, Div Theoret, Div CCS3, Los Alamos, NM 87545 USA. RP Santhi, N (reprint author), LANL, Div Theoret, Div CCS3, MS B213,T-13, Los Alamos, NM 87545 USA. OI Santhi, Nandakishore/0000-0002-4755-7821 NR 14 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1397-3 PY 2007 BP 1351 EP 1355 DI 10.1109/ISIT.2007.4557130 PG 5 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHW32 UT WOS:000257010201102 ER PT B AU Chertkov, M Stepanov, M AF Chertkov, Michael Stepanov, Mikhail GP IEEE TI Pseudo-codeword landscape SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-7 LA English DT Proceedings Paper CT IEEE International Symposium on Information Theory CY JUN 24-29, 2007 CL Nice, FRANCE SP IEEE ID MATHEMATICAL-THEORY; CODES; GRAPHS; COMMUNICATION; CYCLES AB We discuss the performance of Low-Density-ParityCheck (LDPC) codes decoded by means of Linear Programming (LP) at moderate and large Signal-to-Noise-Ratios (SNR). Utilizing a combination of the previously introduced pseudocodeword-search method and a new "dendro" trick, which allows us to reduce the complexity of the LP decoding, we analyze the dependence of the Frame-Error-Rate (FER) on the SNR. Under Maximum-A-Posteriori (MAP) decoding the dendro-code, having only checks with connectivity degree three, performs identically to its original code with high-connectivity checks. For a number of popular LDPC codes performing over the Additive-White-Gaussian-Noise (AWGN) channel we found that either an error-floor sets at a relatively low SNR, or otherwise a transient asymptote, characterized by a faster decay of FER with the SNR increase, precedes the error-floor asymptote. We explain these regimes in terms of the pseudo-codeword spectra of the codes. C1 [Chertkov, Michael] LANL, Div Theoret, MS B213,T-13, Los Alamos, NM 87545 USA. [Stepanov, Mikhail] Univ Arizona, Dept Math, Tucson, AZ 85721 USA. RP Chertkov, N (reprint author), LANL, Div Theoret, MS B213,T-13, Los Alamos, NM 87545 USA. EM chertkov@lanl.gov; stepanov@math.arizona.edu RI Chertkov, Michael/O-8828-2015 NR 25 TC 6 Z9 6 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1397-3 PY 2007 BP 1546 EP + DI 10.1109/ISIT.2007.4557442 PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHW32 UT WOS:000257010201141 ER PT S AU Koehler, A Taylor, K AF Koehler, Andrew Taylor, Karen GP IEEE TI Towards a political framework for socio-technical system design SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON TECHNOLOGY AND SOCIETY SE IEEE International Symposium on Technology and Society LA English DT Proceedings Paper CT IEEE International Symposium on Technology and Society CY JUN 01-02, 2007 CL Las Vegas, NV SP IEEE C1 [Koehler, Andrew] Los Alamos Natl Lab, Def Threat Reduct Agcy, Los Alamos, NM 87545 USA. [Taylor, Karen] Tulane Univ, Dept Commun, New Orleans, LA 70118 USA. RP Koehler, A (reprint author), Los Alamos Natl Lab, Def Threat Reduct Agcy, Los Alamos, NM 87545 USA. EM akoehler@lanl.gov; ktaylor1@tulane.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2158-3404 BN 978-1-4244-0586-2 J9 INT SYMP TECHNOL SOC PY 2007 BP 132 EP + PG 2 WC Computer Science, Interdisciplinary Applications; Political Science; Social Issues SC Computer Science; Government & Law; Social Issues GA BHL35 UT WOS:000254030000022 ER PT S AU Sims, B Henke, C AF Sims, Benjamin Henke, Christopher GP IEEE TI Stockpile stewardship and the reliable replacement warhead: Socio-technical repair in the US nuclear weapons complex SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON TECHNOLOGY AND SOCIETY SE IEEE International Symposium on Technology and Society LA English DT Proceedings Paper CT IEEE International Symposium on Technology and Society CY JUN 01-02, 2007 CL Las Vegas, NV SP IEEE AB The end of the Cold War created great uncertainty about the future of U.S. nuclear weapons design laboratories. But the laboratories emerged from this crises with new work to do and budgets largely intact. We use the metaphor of socio-technical "repair" to describe how institutions alter technologies and social practices in order to adapt to change. An initial repair strategy, the Stockpile Stewardship Program, sought to transform weapons knowledge with a focus on modeling and simulation, but took a conservative approach to maintaining weapons in the stockpile. A more recent approach, built around the proposed Reliable Replacement Warhead (RRW), places less emphasis on the development of new knowledge, but seeks to transform the stockpile by redesigning weapon components with long-term stockpile storage in mind. The emergence of RRW as a credible repair strategy reflects significant change in the knowledge and culture of the nuclear weapons community and in the political relevance of nuclear weapons in the era of Stockpile Stewardship. C1 [Sims, Benjamin] Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. [Henke, Christopher] Colgate Univ, Dept Sociol & Anthropol, Hamilton, NY 13346 USA. RP Sims, B (reprint author), Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. EM bsims@lanl.gov; chenke@mail.colgate.edu NR 15 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2158-3404 BN 978-1-4244-0586-2 J9 INT SYMP TECHNOL SOC PY 2007 BP 188 EP + PG 2 WC Computer Science, Interdisciplinary Applications; Political Science; Social Issues SC Computer Science; Government & Law; Social Issues GA BHL35 UT WOS:000254030000033 ER PT S AU Taylor, K Wiedlea, ACK AF Taylor, Karen Wiedlea, Andrew C. K. GP IEEE TI In defense of ugliness: The role of technical presence in critical infrastructure system endurance SO 2007 IEEE INTERNATIONAL SYMPOSIUM ON TECHNOLOGY AND SOCIETY SE IEEE International Symposium on Technology and Society LA English DT Proceedings Paper CT IEEE International Symposium on Technology and Society CY JUN 01-02, 2007 CL Las Vegas, NV SP IEEE AB A poorly studied aspect of Critical Infrastructure (CI) performance involves the ways in which stakeholders understand and relate to the material form of the system. Using the New Orleans and Dutch levee system. as an example, we argue for greater appreciation by CI designers of the important role system aesthetics play in signaling the system's importance, vulnerabilities and social significance. We present one possible method by which this qualitative relationship between system design choice and public perceptions of the system (the interaction between the two factors we call "Design Voice") can be better understood as part of disciplined analysis versus the traditional primarily anecdotal approach to the topic. C1 [Taylor, Karen] Tulane Univ, New Orleans, LA 70118 USA. [Wiedlea, Andrew C. K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Taylor, K (reprint author), Tulane Univ, New Orleans, LA 70118 USA. EM ktaylor1@tulane.edu; akoehler@lanl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2158-3404 BN 978-1-4244-0586-2 J9 INT SYMP TECHNOL SOC PY 2007 BP 210 EP + PG 3 WC Computer Science, Interdisciplinary Applications; Political Science; Social Issues SC Computer Science; Government & Law; Social Issues GA BHL35 UT WOS:000254030000036 ER PT B AU Makarov, YV Ma, J Dong, ZY AF Makarov, Yuri V. Ma, Jian Dong, Zhao Yang GP IEEE TI Non-iterative method to determine static stability boundaries SO 2007 IEEE LAUSANNE POWERTECH, VOLS 1-5 LA English DT Proceedings Paper CT IEEE Lausanne Powertech CY JUL 01-05, 2007 CL Lausanne, SWITZERLAND SP IEEE DE power flow; static voltage and angle stability; Saddle Node Bifurcation; wide area security assessmen ID POWER-SYSTEMS; BIFURCATIONS; COMPUTATION AB Static voltage and angle stability conditions are often associated with singularities of the power flow Jacobian (Saddle Node Bifurcations - SNB). This paper presents an idea of a new method based on SNB conditions written in Cartesian coordinates. These coordinates used instead of the polar coordinates allow non-iterative locating power flow SNB points. A singularity problem is formulated as a linear set of equations. The singular value decomposition is used to find its solutions. The new method allows quick exploration of the static stability boundary in real-time security assessment applications. This paper outlines some very promising initial results for two power systems. C1 [Makarov, Yuri V.] Pacific Northwest Natl Lab, Richland, WA 99352 USA. [Ma, Jian; Dong, Zhao Yang] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia. RP Makarov, YV (reprint author), Pacific Northwest Natl Lab, Richland, WA 99352 USA. EM yuri.makarov@pnl.gov; jian@itee.uq.edu.au; zdong@itee.uq.edu.au RI gao, xiaodan/K-3594-2015 NR 15 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-2189-3 PY 2007 BP 349 EP + DI 10.1109/PCT.2007.4538342 PG 2 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BID65 UT WOS:000258730100061 ER PT S AU Zhao, ZY Zhang, WM Yi, C Stiff-Roberts, AD Rodriguez, BJ Baddorf, AP AF Zhao, Z. Y. Zhang, W. M. Yi, C. Stiff-Roberts, A. D. Rodriguez, B. J. Baddorf, A. P. GP IEEE TI Doping characterization of InAs/GaAs quantum dot heterostructure by cross-sectional scanning capacitance microscopy SO 2007 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2 SE IEEE Lasers and Electro-Optics Society (LEOS) Annual Meeting LA English DT Proceedings Paper CT 20th Annual Meeting of the IEEE-Lasers-and-Electro-Optics-Society CY OCT 21-25, 2007 CL Lake Buena Vista, FL AB Cross-section of multi-layer InAs/GaAs quantum dot heterostructure has been characterized using scanning capacitance microscopy to investigate dopant incorporation into quantum dots. Simulation of the corresponding band structure is used to better understand the experimental results. C1 [Zhao, Z. Y.; Zhang, W. M.; Yi, C.; Stiff-Roberts, A. D.] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. [Rodriguez, B. J.; Baddorf, A. P.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. RP Zhao, ZY (reprint author), Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. RI Rodriguez, Brian/A-6253-2009; Baddorf, Arthur/I-1308-2016 OI Rodriguez, Brian/0000-0001-9419-2717; Baddorf, Arthur/0000-0001-7023-2382 FU Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy; National Science Foundation [0547273]; Air Force Office of Scientific Research [FA9550-06-1-0482] FX Thus, we have demonstrated that by characterizing QD heterostructures featuring different direct- and remote-doping schemes, a comprehensive picture of dopant incorporation in QDs can be obtained experimentally using the SCM technique. Simulation of the bandstructure can be used to verify the experimental results, leading to better understanding of doping in QD structures. Such information is extremely important in optimizing the doping techniques used during MBE growth of QDIPs in order to enhance device performance. A more detailed analysis of the cross-sectional SCM experiment and the corresponding simulation results will be presented at the conference. A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy. This work is supported in part by the National Science Foundation under Grant No. 0547273 and the Air Force Office of Scientific Research under Grant No. FA9550-06-1-0482. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1092-8081 BN 978-1-4244-0924-2 J9 IEEE LEOS ANN MTG PY 2007 BP 32 EP + DI 10.1109/LEOS.2007.4382260 PG 2 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Optics SC Engineering; Science & Technology - Other Topics; Optics GA BIG51 UT WOS:000259345200015 ER PT S AU Skinner, JL Talin, AA Horsley, DA AF Skinner, J. L. Talin, A. A. Horsley, D. A. GP IEEE TI Optical modulation with nanohole gratings made by nanoimprint lithography SO 2007 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2 SE IEEE Lasers and Electro-Optics Society (LEOS) Annual Meeting LA English DT Proceedings Paper CT 20th Annual Meeting of the IEEE-Lasers-and-Electro-Optics-Society CY OCT 21-25, 2007 CL Lake Buena Vista, FL AB A silver film perforated with an array of circular nanoholes fabricated by thermal nanoimprint lithography is brought in and out of contact with a quartz superstrate to yield a 60 % amplitude modulation in reflectivity. C1 [Skinner, J. L.; Horsley, D. A.] Univ Calif Davis, Davis, CA 95616 USA. [Skinner, J. L.; Horsley, D. A.] Berkeley Sensor & Actuator Ctr, Livermore, CA 94551 USA. [Talin, A. A.] Ctr Integrated Nanotechnol, Livermore, CA 94551 USA. [Skinner, J. L.; Talin, A. A.] Sandia Natl Labs, Livermore, CA 94551 USA. RP Skinner, JL (reprint author), Univ Calif Davis, Davis, CA 95616 USA. EM jlskinn@sandia.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1092-8081 BN 978-1-4244-0924-2 J9 IEEE LEOS ANN MTG PY 2007 BP 711 EP + DI 10.1109/LEOS.2007.4382605 PG 2 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Optics SC Engineering; Science & Technology - Other Topics; Optics GA BIG51 UT WOS:000259345200355 ER PT S AU Dawson, JW Messerly, MJ Phan, H Siders, CW Beach, RJ Barty, CPJ AF Dawson, Jay W. Messerly, Mchael J. Phan, Henry Siders, Craig W. Beach, Raymond J. Barty, C. P. J. GP IEEE TI Fiber laser front ends for high energy, short pulse lasers SO 2007 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2 SE IEEE Lasers and Electro-Optics Society (LEOS) Annual Meeting LA English DT Proceedings Paper CT 20th Annual Meeting of the IEEE-Lasers-and-Electro-Optics-Society CY OCT 21-25, 2007 CL Lake Buena Vista, FL AB We are developing a fiber laser system for short pulse (1-10ps), high energy (similar to 1kJ) glass laser systems. Fiber lasers are ideal for these systems as they are highly reliable and enable long term stable operation. C1 [Dawson, Jay W.; Messerly, Mchael J.; Phan, Henry; Siders, Craig W.; Beach, Raymond J.; Barty, C. P. J.] Lawrence Livermore Natl Lab, Photon Sci & Applicat Program, Natl Ignit Facil, 7000 East Ave, Livermore, CA 94550 USA. RP Dawson, JW (reprint author), Lawrence Livermore Natl Lab, Photon Sci & Applicat Program, Natl Ignit Facil, 7000 East Ave, Livermore, CA 94550 USA. EM dawson17@llnl.gov NR 5 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1092-8081 BN 978-1-4244-0924-2 J9 IEEE LEOS ANN MTG PY 2007 BP 776 EP + DI 10.1109/LEOS.2007.4382638 PG 2 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Optics SC Engineering; Science & Technology - Other Topics; Optics GA BIG51 UT WOS:000259345200388 ER PT B AU Hammonds, JS Mejia, E Nolan, M Persaud, C Home, E Kamath, B Butcher, T AF Hammonds, J. S., Jr. Mejia, E. Nolan, M. Persaud, C. Home, Ed Kamath, B. Butcher, T. GP IEEE TI Demonstration of a Self-Powered Boiler Concept Based on Emitter-less Thermophotovoltaic Power Generation SO 2007 IEEE LONG ISLAND SYSTEMS, APPLICATIONS AND TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT 3rd Annual IEEE Long Island Systems, Applications and Technology Conference CY MAY 04, 2007 CL Farmingdale, NY SP IEEE DE thermophotovoltaies; GaSb photovoltaic cells; combined heat and power; thermal power generation AB In this study the technical feasibility of implementing thermophotovoltaic (TPV) power generation through the use of GaSb photocells within the chamber of a residential, oil-fired boiler was evaluated. The objective of this work is a self-powered hydronic heating system for which an estimated 200 watts of power is needed. An approach was developed in which direct radiation from the combustion chamber is incident on TPV cells which are protected only by a quartz plate. This work differs from that of previous TPV research in that no stand-alone thermal emitter is used. It was demonstrated experimentally that a power densities greater than 2 watts/cm(2) could be achieved with this '' emitter-less '' approach. The results of this work also demonstrate that the power density is strongly affected by the burner excess air level. C1 [Hammonds, J. S., Jr.; Mejia, E.; Nolan, M.; Persaud, C.] CUNY City Coll, New York, NY 10031 USA. [Home, Ed] Edtek Inc, Kent, WA 98032 USA. [Kamath, B.] Heat Wise Inc, Medford, NY 11763 USA. [Butcher, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Hammonds, JS (reprint author), CUNY City Coll, New York, NY 10031 USA. EM butcher@bnl.gov NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1301-0 PY 2007 BP 1 EP + DI 10.1109/LISAT.2007.4312633 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BHA37 UT WOS:000251802100001 ER PT B AU Camarda, GS Bolotnikov, AE Hossain, A Cui, Y Kohman, KT James, RB AF Camarda, G. S. Bolotnikov, A. E. Hossain, A. Cui, Y. Kohman, K. T. James, R. B. GP IEEE TI CdZnTe room-temperature semiconductor gamma-ray detector for national-security applications SO 2007 IEEE LONG ISLAND SYSTEMS, APPLICATIONS AND TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT 3rd Annual IEEE Long Island Systems, Applications and Technology Conference CY MAY 04, 2007 CL Farmingdale, NY SP IEEE DE CdZnTe; radiation detectors; Te inclusions ID RADIATION DETECTOR; GROWTH AB One important mission of the Department of Energy's National Nuclear Security Administration is to develop reliable gamma-ray detectors to meet the widespread needs of users for effective techniques to detect and identify special nuclear- and radioactive-materials. Accordingly, the Nonproliferation and National Security Department at Brookhaven National Laboratory was tasked to evaluate existing technology and to develop improved room-temperature detectors based on semiconductors, such as CdZnTe (CZT). Our research covers two important areas: Improving the quality of CZT material, and exploring new CZT-based gamma-ray detectors. In this paper, we report on our recent findings from the material characterization and tests of actual CZT devices fabricated in our laboratory and from materials/detectors supplied by different commercial vendors. In particular, we emphasize the critical role of secondary phases in the current CZT material and issues in fabricating the CZT detectors, both of which affect their performance. C1 [Camarda, G. S.; Bolotnikov, A. E.; Hossain, A.; Cui, Y.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Kohman, K. T.] Kansas State Univ, Manhattan, KS 66506 USA. RP Camarda, GS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM bolotnik@bnl.gov FU U.S. Departement of Energy; Office of Nonproliferation Research and Engineering [NA-22]; Brookavn Science Associates; LLC [DL-ACO2-9SCH1-556] FX This work was supported by U.S. Departement of Energy, Office of Nonproliferation Research and Engineering, NA-22. The mnuamscript has been authored by Brookavn Science Associates, LLC under contract No. DL-ACO2-9SCH1-556 with the U.S. Departement of Energy. NR 13 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1301-0 PY 2007 BP 92 EP + PG 3 WC Engineering, Electrical & Electronic SC Engineering GA BHA37 UT WOS:000251802100016 ER PT B AU Vanier, PE Forman, L Dioszegi, I Salwen, C Ghosh, VJ AF Vanier, Peter E. Forman, Leon Dioszegi, Istvan Salwen, Cynthia Ghosh, Vinita J. GP IEEE TI Directional detection of fission-spectrum neutrons SO 2007 IEEE LONG ISLAND SYSTEMS, APPLICATIONS AND TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT 3rd Annual IEEE Long Island Systems, Applications and Technology Conference CY MAY 04, 2007 CL Farmingdale, NY SP IEEE DE directional detection; fast neutron; fission spectrum; proton recoil; special nuclear materials ID SPECTROMETER AB Conventional neutron detectors consisting of He-3 tubes surrounded by a plastic moderator can be quite efficient in detecting fission spectrum neutrons, but do not indicate the direction of the incident radiation. We have developed a new directional detector based on double proton recoil in two separated planes of plastic scintillators. This method allows the spectrum of the neutrons to be measured by a combination of peak amplitude in the first plane and time of flight to the second plane. It also allows the determination of the angle of scattering in the first plane. If the planes are position-sensitive detectors, then the direction of the scattered neutron is known, and the direction of the incident neutron can be determined to lie on a cone of a fixed angle. The superposition of many such cones generates an image that indicates the presence of a localized source. Typical background neutron fluences from the interaction of cosmic rays with the atmosphere are low and fairly uniformly distributed in angle. Directional detection helps to locate a manmade source in the presence of natural background. Monte Carlo simulations are compared with experimental results. C1 [Vanier, Peter E.; Dioszegi, Istvan; Salwen, Cynthia; Ghosh, Vinita J.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Forman, Leon] Ion Focus Technol, Miller Place, NY 11764 USA. RP Vanier, PE (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM vanier@bnl.gov FU U.S. Department of Energy; Office of Nonproliferation Research and Engineering [NA-22]; Brookhaven Science Associates; LLC [DE-ACO2-98CH1-88] FX This work was supported by U.S. Department of Energy, Office of Nonproliferation Research and Engineering, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-ACO2-98CH1-886 with the U.S. Department of Energy. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1301-0 PY 2007 BP 114 EP + PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BHA37 UT WOS:000251802100020 ER PT S AU Ramaswamy, V Thulasidasan, S Romero, P Eidenbenz, S Cuellar, L AF Ramaswamy, Venkatesh Thulasidasan, Sunil Romero, Phil Eidenbenz, Stephan Cuellar, Leticia GP IEEE TI Simulating the national telephone network: A socio-technical approach to assessing infrastructure criticality SO 2007 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-8 SE IEEE Military Communications Conference LA English DT Proceedings Paper CT IEEE Military Communications Conference (MILCOM 2007) CY OCT 29-31, 2007 CL Orlando, FL SP IEEE AB We describe the concepts and key results of an end-to-end simulation of the national telephone network developed at Los Alamos National Laboratory; we model and simulate the wireline and cellular phone networks of the entire continental United States on a call-by-call resolution using a socio-technical modeling paradigm. The simulation suite-M]ITS-P (Multi-Scale Integrated Information and Telecommunications System-Phone sector) has the following conceptual building blocks (i) a network generation module that models each of approximately 25,000 PSTN and cell phone wire-centers and their connections based on industry data, (ii) a session generation module that generates individual calls between end-user devices based on US census data and surveys on end-user calling behavior, and (iii) the actual simulator module that routes the calls over the network imitating real-life routing algorithms as closely as possible. Scaling to a national level, which means simulating a total of about 10 billion calls is made possible through MIITS-P's use of discrete-event distributed simulation technology that runs on computing clusters. Using MIITS-P, we present results on a nation-wide scale, ranking the economic values of each wire-center based on the number of call-seconds routed over a 24 hour period. We find that (i) the highest ranked wire-centers route on the order of 100 million call-minutes per day, (ii) the call-minutes per day decrease rapidly with rank such that these values are already a magnitude smaller in the second rank percentile and two magnitudes smaller in the 15th rank percentile, (iii) somewhat counter-intuitively, the number of switches located in a wire-center does not correlate strongly with the number of call-minutes routed through that center, and (iv) the most important wirecenters tend to be located in metropolitan areas, but metros of comparable population size can have different numbers of important wire-centers. C1 [Ramaswamy, Venkatesh; Thulasidasan, Sunil; Romero, Phil; Eidenbenz, Stephan; Cuellar, Leticia] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ramaswamy, V (reprint author), Los Alamos Natl Lab, POB 1663,MS B256, Los Alamos, NM 87545 USA. EM vramaswa@lanl.gov; sunil@lanl.gov; prr@lanl.gov; eidenben@lanl.gov; leticia@lanl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2155-7578 BN 978-1-4244-1512-0 J9 IEEE MILIT COMMUN C PY 2007 BP 2437 EP 2443 PG 7 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHL80 UT WOS:000254160001147 ER PT S AU Hou, HL Corbett, C Li, YS Beyah, R AF Hou, Hailong Corbett, Cherita Li, Yingshu Beyah, Raheem GP IEEE TI Dynamic energy-based encoding and filtering in sensor networks SO 2007 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-8 SE IEEE Military Communications Conference LA English DT Proceedings Paper CT IEEE Military Communications Conference (MILCOM 2007) CY OCT 29-31, 2007 CL Orlando, FL SP IEEE DE sensor networks; data filtering; energy-based keying; In-line filtering; sensor security AB In critical sensor deployments it is important to ensure the authenticity and integrity of sensed data. Further, one must ensure that false data injected into the network by malicious nodes is not perceived as accurate data. In this paper we present the Dynamic Energy-based Encoding and Filtering (DEEF) framework to detect the injection of false data into a sensor network. DEEF requires that each sensed event report be encoded using a simple encoding scheme based on a keyed hash. The key to the hashing function dynamically changes as a function of the transient energy of the sensor, thus requiring no need for re-keying. Depending on the cost of transmission vs. computational cost of encoding, it may be important to remove data as quickly as possible. Accordingly, DEEF can provide authentication at the edge of the network or authentication inside of the sensor network. Depending on the optimal configuration, as the report is forwarded, each node along the way verifies the correctness of the encoding probabilistically and drops those that are invalid. We have evaluated DEEF's feasibility and performance through analysis. Our results show that DEEF, without incurring transmission overhead (increasing packet size), is able to eliminate 90% - 99% of false data injected from an outsider within 9 hops before it reaches the sink. C1 [Hou, Hailong; Li, Yingshu; Beyah, Raheem] Georgia State Univ, Dept Comp Sci, Atlanta, GA 30303 USA. [Corbett, Cherita] Sandia Natl Labs, Comp & Network Securit Grp, Livermore, CA USA. RP Hou, HL (reprint author), Georgia State Univ, Dept Comp Sci, Atlanta, GA 30303 USA. EM hhou2@student.gsu.edu; clcorbe@sandia.gov; yli@cs.gsu.edu; rbeyah@cs.gsu.edu NR 31 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2155-7578 BN 978-1-4244-1512-0 J9 IEEE MILIT COMMUN C PY 2007 BP 3001 EP + PG 3 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHL80 UT WOS:000254160002001 ER PT S AU Nutaro, J Kuruganti, PT AF Nutaro, James Kuruganti, Phani Teja GP IEEE TI Fast, accurate RF propagation modeling and simulation tool for highly cluttered environments SO 2007 IEEE MILITARY COMMUNICATIONS CONFERENCE, VOLS 1-8 SE IEEE Military Communications Conference LA English DT Proceedings Paper CT IEEE Military Communications Conference (MILCOM 2007) CY OCT 29-31, 2007 CL Orlando, FL SP IEEE AB As the network centric warfare and distributed operations paradigms unfold, there is a growing need for robust wireless network deployment tools. These tools must take into consideration the terrain of the operating theater, and facilitate modeling of end to end network performance based on accurate RF propagation predictions. It is well known that statistical models can not provide accurate, site specific predictions of radio channel behavior. In this paper an event-driven wave propagation simulation is proposed as a computationally efficient technique for predicting critical propagation characteristics of RF signals in cluttered environments. Convincing validation and simulator performance studies confirm the suitability of this method for indoor and urban area RF channel modeling. By integrating our RF propagation prediction tool, RCSIM, with popular packet-level network simulators, we are able to construct an end to end network analysis tool for wireless networks operating in built-up urban areas. C1 [Nutaro, James; Kuruganti, Phani Teja] Oak Ridge Natl Lab, Computat Sci & Engn Lab, Oak Ridge, TN 37831 USA. RP Nutaro, J (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Lab, Oak Ridge, TN 37831 USA. EM nutaroj@ornl.gov; kurugantipvl@ornl.gov NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2155-7578 BN 978-1-4244-1512-0 J9 IEEE MILIT COMMUN C PY 2007 BP 3240 EP 3246 PG 7 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BHL80 UT WOS:000254160002036 ER PT S AU Kang, Y Wilson, J Hardek, T Vassioutchenko, A AF Kang, Yoon Wilson, Joshua Hardek, Thomas Vassioutchenko, Alexander GP IEEE TI Development of fast high-power RF vector modulator employing TEM ferrite phase shifters SO 2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT IEEE/MTT-S International Microwave Symposium CY JUN 03-08, 2007 CL Honolulu, HI SP IEEE MTTS DE accelerator RF systems; phase shifters; modulation AB Recent charged-particle accelerator projects employ high power RF distribution systems to power superconducting radio frequency (SRF) accelerating cavities. Each cavity usually requires several hundred killowatts of pulsed power at relatively high duly cycle (roughly up to 10% in high-power proton linear accelerators) in low UHF bands for production of the particle beam. So far, one amplifier to one cavity configuration is common, since precise vector control of RF is done at the low power inputs of the amplifiers. If a fan-out configuration that feeds many cavities with a single very high-power amplifier klystron is realized, significant cost savings can be achieved in construction and installation. The fan-out configuration, however, requires independent control of RF amplitudes and phases to the cavities at high power level. A prototype high-power RF vector modulator for such applications has been built and tested. The vector modulator employs a quadrature hybrid and two fast ferrite phase shifters in square coaxial transverse electromagnetic (TEM) transmission fines. The square coaxial format can provide the power-handling capability and thermal stability. RF properties of the design and results of high power system testing of the design are presented. C1 [Kang, Yoon; Wilson, Joshua; Hardek, Thomas; Vassioutchenko, Alexander] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Kang, Y (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0149-645X BN 978-1-4244-0687-6 J9 IEEE MTT-S PY 2007 BP 698 EP 701 PG 4 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BGV76 UT WOS:000250827401076 ER PT S AU Buslov, OY Golovkov, AA Keis, VN Kozyrev, AB Krasilnikov, SV Samoilova, TB Shimko, AY Ginley, D Kaydanova, T AF Buslov, O. Yu. Golovkov, A. A. Keis, V. N. Kozyrev, A. B. Krasilnikov, S. V. Samoilova, T. B. Shimko, A. Yu Ginley, D. Kaydanova, T. GP IEEE TI Active integrated antenna based on planar dielectric resonator with tuning ferroelectric varactor SO 2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6 SE IEEE MTT-S International Microwave Symposium LA English DT Proceedings Paper CT IEEE/MTT-S International Microwave Symposium CY JUN 03-08, 2007 CL Honolulu, HI SP IEEE MTTS DE active antenna; planar dielectric resonator; tunable oscillator; VCO; ferroelectric varactor AB Design of tunable Gunn diode - based active antenna module including new type of planar dielectric resonator is presented. Module is designed in such a way that planar dielectric resonator acts both as a stabilizing resonator and as a radiator. Ferroelectric varactor with tunability C-max/C-min similar to 2.0 and tan delta similar to 0.02 is used for radiation frequency tuning. Module operates at frequency around of 17GHz and demonstrates the radiated power 8.8 +/- 0.1 dBm over the tuning range 130MHz and phase noise level center dot 80 dBc/Hz at 100 kHz offset. 65 degrees width of radiation pattern in both E and H planes corresponding the gain of 5.1dBi were measured. C1 [Buslov, O. Yu.; Golovkov, A. A.; Keis, V. N.; Kozyrev, A. B.; Krasilnikov, S. V.; Samoilova, T. B.; Shimko, A. Yu] St Petersburg State Electrotech Univ, St Petersburg 197396, Russia. [Ginley, D.; Kaydanova, T.] Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Buslov, OY (reprint author), St Petersburg State Electrotech Univ, St Petersburg 197396, Russia. EM mcl@eltech.ru NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0149-645X BN 978-1-4244-0687-6 J9 IEEE MTT S INT MICR PY 2007 BP 1198 EP + PG 2 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BGV76 UT WOS:000250827403021 ER PT S AU Sheen, DM McMakin, DL Hall, TE AF Sheen, David M. McMakin, Douglas L. Hall, Thomas E. GP IEEE TI Near field imaging at microwave and millimeter wave frequencies SO 2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT IEEE/MTT-S International Microwave Symposium CY JUN 03-08, 2007 CL Honolulu, HI SP IEEE MTTS DE microwave imaging; millimeter wave imaging; microwave holography; radar imaging; concealed weapon detection AB Near field imaging at microwave and millimeter wave frequencies is useful for a wide variety of applications including concealed weapon detection, through-wall and inner-wall imaging, ground penetrating radar imaging, radar cross section analysis, and non-destructive evaluation of materials. A variety of novel imaging techniques have been developed for many of these applications at the Pacific Northwest National Laboratory (PNNL). These techniques make use of wideband holographic wavefront reconstruction methods, and have been developed to optimize the image quality and resolution. This paper will summarize several of these techniques and show imaging results for several interesting application areas. C1 [Sheen, David M.; McMakin, Douglas L.; Hall, Thomas E.] Pacific NW Natl Lab, Richland, WA 99354 USA. RP Sheen, DM (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA. NR 7 TC 1 Z9 1 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0149-645X BN 978-1-4244-0687-6 J9 IEEE MTT-S PY 2007 BP 1687 EP 1690 PG 4 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BGV76 UT WOS:000250827404047 ER PT S AU Lee, M Highstrete, C Vallett, A Dilts, SM Redwing, JM Mayer, TS AF Lee, Mark Highstrete, Clark Vallett, Aaron Dilts, Sarah M. Redwing, Joan M. Mayer, Theresa S. GP IEEE TI Microwave dissipation spectra in arrays of silicon nanowires SO 2007 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-6 SE IEEE MTT-S International Microwave Symposium LA English DT Proceedings Paper CT IEEE/MTT-S International Microwave Symposium CY JUN 03-08, 2007 CL Honolulu, HI SP IEEE MTTS DE microwave measurements; microwave devices; nanotechnology; materials testing ID ELECTRICAL-PROPERTIES; CARBON NANOTUBES; TRANSPORT AB The transmission and reflection scattering parameters of arrays of silicon nanowires (SiNWs) directly assembled onto co-planar waveguides (CPWs) have been measured from 0.1 to 50 GHz at room temperature. Topical arrays consisted of between 103 to 104 SiNWs aligned parallel to the electric field polarization of the propagating microwave field. Scattering parameters were measured on CPWs both before and after nanomaterial assembly. Highly reproducible CPW characteristics and careful use of control samples to quantify systematic reproducibility allowed clear separation of nanomaterial effects from the characteristics of the bare CPWs. Arrays of n doped SiNWs consistently showed frequency-dependent power dissipation. Nominally undoped SiNW arrays, however, showed no measurable microwave power dissipation up to 50 GHz. C1 [Lee, Mark; Highstrete, Clark] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Vallett, Aaron; Dilts, Sarah M.; Redwing, Joan M.; Mayer, Theresa S.] Penn State Univ, University Pk, PA 16802 USA. RP Lee, M (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. FU United States Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]; NSF NIRT [ECCS-0609282]; NSF MRSEC [DMR-0213623] FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Penn State co-authors acknowledge additional support from NSF NIRT ECCS-0609282 and NSF MRSEC DMR-0213623. NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0149-645X BN 978-1-4244-0687-6 J9 IEEE MTT S INT MICR PY 2007 BP 1758 EP + PG 2 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA BGV76 UT WOS:000250827404064 ER PT B AU Shah, AR Markowitz, VM Oehmen, CS AF Shah, Anuj R. Markowitz, Victor M. Oehmen, Christopher S. GP IEEE TI High-throughput computation of pairwise sequence similarities for multiple genome comparisons using ScalaBLAST SO 2007 IEEE/NIH LIFE SCIENCE SYSTEMS AND APPLICATIONS WORKSHOP LA English DT Proceedings Paper CT IEEE/NIH Life Science Systems and Applications Workshop CY SEP 05-07, 2007 CL Bethesda, MD SP IEEE, NIH ID BLAST; SYSTEM AB Genome sequence comparisons of exponentially growing data sets form the foundation for the comparative analysis tools provided by community biological data resources such as the Integrated Microbial Genome (IMG) system at the Joint Genome Institute (JGI). For a genome sequencing center to provide multiple-genome comparison capabilities, it must keep pace with exponentially growing collection of sequence data, both from its own genomes, and from public genomes. We present an example of how ScalaBLAST, a high-throughput sequence analysis program, harnesses increasingly critical high-performance computing to perform sequence analysis, enabling, for example, all vs. all BLAST runs across 2 million protein sequences within a day using thousands of processors as opposed to conventional comparison methods that would take years to complete. C1 [Shah, Anuj R.; Oehmen, Christopher S.] Pacific Northwest Natl Lab, Computat Biol & Bioinformat, Richland, WA 99352 USA. [Markowitz, Victor M.] Biol Data Management & Technol Ctr, Berkeley, CA USA. RP Shah, AR (reprint author), Pacific Northwest Natl Lab, Computat Biol & Bioinformat, Richland, WA 99352 USA. FU Data-intensive Computing for Complex Biological Systems project - Office of Advanced Scientific Computing Research; U.S. Department of Energy [DE-AC06-76RL01830]; Office of Science, Office of Biological and Environmental Research, Life Sciences Division, U.S. Department of Energy [DE-AC03-76SF00098]; U.S. DOE FX This research was supported by the Data-intensive Computing for Complex Biological Systems project funded by the Office of Advanced Scientific Computing Research, and under the LDRD Program at the Pacific Northwest National Laboratory, a multiprogram national laboratory operated by Battelle for the U.S. Department of Energy under Contract DE-AC06-76RL01830; and by the Director, Office of Science, Office of Biological and Environmental Research, Life Sciences Division, U.S. Department of Energy under Contract No. DE-AC03-76SF00098. This research performed in part using the Molecular Science Computing Facility (MSCF) in the Wiliam R. Wiley Environmental Molecular Science Laboratory (EMSL), a national scientific user facility sponsored by the U.S. DOE, OBER and located at PNNL. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1812-1 PY 2007 BP 89 EP + DI 10.1109/LSSA.2007.4400891 PG 2 WC Engineering, Biomedical; Engineering, Electrical & Electronic SC Engineering GA BHP91 UT WOS:000255229500022 ER PT B AU Oishi, M May, E AF Oishi, Meeko May, Elebeoba GP IEEE TI Addressing biological circuit simulation accuracy: Reachability for parameter identification and initial conditions SO 2007 IEEE/NIH LIFE SCIENCE SYSTEMS AND APPLICATIONS WORKSHOP LA English DT Proceedings Paper CT IEEE/NIH Life Science Systems and Applications Workshop CY SEP 05-07, 2007 CL Bethesda, MD SP IEEE, NIH DE hybrid systems; reachability; biological circuits; tryptophan; Escherichia coli; parameter identification ID COMPUTATIONAL TECHNIQUES; SYSTEMS; VERIFICATION; ALGORITHMS; MODELS AB Accurate simulation of biological networks is difficult not only due to the computational cost associated with large-scale systems simulation, but also due to the inherent limitations of mathematical models. We address two components to improve biological circuit simulation accuracy: 1) feasible initial conditions, and 2) identification of critical yet unknown model parameters. For those parameters that may not be available from experimental data, we incorporate reachability analysis to enhance our optimization/simulation framework and estimate those parameters that are capable of creating behaviors consistent with known experimental data. We apply these techniques to a biological circuit model of tryptophan blosynthesis in E. coli, and quantify the improvement in simulation accuracy when reachability analysis is used. C1 [Oishi, Meeko] Univ British Columbia, Elect & Comp Engn, Vancouver, BC V5Z 1M9, Canada. [May, Elebeoba] Sandia Natl Labs, Computat Biol, Albuquerque, NM USA. RP Oishi, M (reprint author), Univ British Columbia, Elect & Comp Engn, Vancouver, BC V5Z 1M9, Canada. EM moishi@ece.ubc.ca; eemay@sandia.gov NR 20 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-1812-1 PY 2007 BP 152 EP + PG 2 WC Engineering, Biomedical; Engineering, Electrical & Electronic SC Engineering GA BHP91 UT WOS:000255229500038 ER PT S AU Pratte, JF Junnarkar, S Deptuch, G Fried, J O'Connor, P Radeka, V Vaska, P Woody, C Schlyer, D Stoll, S Maramraju, SH Krishnamoorthy, S Lecomte, R Fontaine, R AF Pratte, Jean-Francois Junnarkar, Sachin Deptuch, Grzegorz Fried, Jack O'Connor, Paul Radeka, Veljko Vaska, Paul Woody, Craig Schlyer, David Stoll, Sean Maramraju, Sri Harsha Krishnamoorthy, Srilalan Lecomte, Roger Fontaine, Rejean GP IEEE TI The RatCAP front-end ASIC SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE RatCAP; ASIC; PET; CMOS; photon noise; PET/MR; timing resolution ID AMPLIFIERS; DETECTORS; DESIGN; NOISE; PET AB We report on the design and characterization of a new ASIC for the RatCAP, a head-mounted miniature PET scanner intended for neurological and behavioral studies of an awake rat. The ASIC is composed of 32 channels, each consisting of a charge sensitive preamplifier, a 5-bit programmable gain in the pole-zero network, a 3(rd) order bipolar semi-Gaussian shaper (peaking time of 80 ns), a timing and energy discriminator. The energy discriminator in each channel can be programmed to arm the zero-crossing discriminator using either a low energy threshold or an energy gating window. A 32-to-1 serial encoder is embedded to multiplex into a single output the timing information and channel address of every event. Finally, LVDS I/O were integrated on chip to minimize the digital noise on the read-out PCB. The ASIC was realized in the TSMC 0.18 mu m technology, has a size 3.3 mm x 4.5 mm and a power consumption of 117 mW. The gate length of the N-channel MOSFET input device of the charge sensitive preamplifier was increased to minimize IN noise. This led to a factor similar to 1.5 improvement of the ENC with respect to the first version of the ASIC. An ENC of 650 e-rms was measured with the APD biased at the input. In order to predict the achievable timing resolution, a model was derived to estimate the LSO photon noise contribution to the timing resolution. Measurements were performed to validate the model, which agreed within 12%. The coincidence timing resolution between two typical LSO-APD-ASIC modules was measured using a Ge-68 source. Applying a threshold at 420 keV, a timing resolution of 6.65 ns FWHM was measured. An energy resolution of 18.7% FWHM at 511 keV was measured for a Ge-68 source. C1 [Pratte, Jean-Francois; Junnarkar, Sachin; Deptuch, Grzegorz; Fried, Jack; O'Connor, Paul; Radeka, Veljko; Vaska, Paul; Woody, Craig; Schlyer, David; Stoll, Sean] Brookhaven Natl Lab, Upton, NY 11973 USA. [Maramraju, Sri Harsha; Krishnamoorthy, Srilalan] SUNY Stony Brook, Stony Brook, NY 11794 USA. [Lecomte, Roger; Fontaine, Rejean] Univ Sherbrooke, Sherbrooke, PQ, Canada. RP Pratte, JF (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM jfpratte@bnl.gov OI LECOMTE, Roger/0000-0002-8541-0783 FU Office of Basic Sciences of the U.S. Department of Energy [DE-AC02-98CH10886] FX This work was supported by the Office of Basic Sciences of the U.S. Department of Energy and has been authored by employees of Brookhaven Science Associates, LLC under Contract DE-AC02-98CH10886 with the U.S. Department of Energy. NR 17 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 19 EP 25 DI 10.1109/NSSMIC.2007.4436282 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400004 ER PT S AU De Geronimo, G Chen, W Fried, J Li, Z Pinelli, DA Rehak, P Vernon, E Gaskin, JA Ramsey, BD Anelli, G AF De Geronimo, Gianluigi Chen, Wei Fried, Jack Li, Zheng Pinelli, Donald A. Rehak, Pavel Vernon, Emerson Gaskin, Jessica A. Ramsey, Brian D. Anelli, Giovanni GP IEEE TI Front-end ASIC for high resolution x-ray spectrometers SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SILICON DRIFT DETECTORS; CHARGE-SENSITIVE PREAMPLIFIER; CONTINUOUS RESET; READOUT CIRCUIT; JFET; CHAMBER AB We present an application specific integrated circuit (ASIC) for high-resolution x-ray spectrometers. The ASIC is designed to read out signals from a pixelated silicon drift detector (SDD). Each hexagonal pixel has an area of 15 mm(2) and an anode capacitance of less than 100 IF. There is no integrated Field Effect transistor (FET) in the pixel, rather, the readout is done by wire-bonding the anodes to the inputs of the ASIC. The ASIC provides 14 channels of low-noise charge amplification, high-order shaping with baseline stabilization, and peak detection with analog memory. The readout is sparse and based on low voltage differential signaling. An interposer provides all the interconnections required to bias and operate the system. The channel dissipates 1.6 mW. The complete 14-pixel unit covers an area of 210 mm2, dissipates 12 mW cm(-2), and can be tiled to cover an arbitrarily large detection area. We measured a preliminary resolution of 172 eV at -35 C on the 6 keV peak of a Fe-55 source. C1 [De Geronimo, Gianluigi; Chen, Wei; Fried, Jack; Li, Zheng; Pinelli, Donald A.; Rehak, Pavel; Vernon, Emerson] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. [Gaskin, Jessica A.; Ramsey, Brian D.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. [Anelli, Giovanni] CERN, Geneva, Switzerland. RP De Geronimo, G (reprint author), Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. NR 28 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 26 EP 31 DI 10.1109/NSSMIC.2007.4436283 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400005 ER PT S AU De Geronimo, G Vernon, E Ackley, K Dragone, A Fried, J O'Connor, P He, Z Herman, C Zhang, F AF De Geronimo, Gianluigi Vernon, Emerson Ackley, Kim Dragone, Angelo Fried, Jack O'Connor, Paul He, Zhong Herman, Cedric Zhang, Feng GP IEEE TI Readout ASIC for 3D position-sensitive detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID GAMMA-RAY SPECTROMETERS; CDZNTE DETECTORS; RADIATION DETECTORS; X-RAY; PERFORMANCE; RESOLUTION; SPECTROSCOPY; OPTIMIZATION; CRYSTALS; ARRAY AB We describe an application specific integrated circuit (ASIC) for 3D position-sensitive detectors. It was optimized for pixelated CZT sensors, and it measures, corresponding to an ionizing event, the energy and timing of signals from 121 anodes and one cathode. Each channel provides low-noise charge amplification, high-order shaping, along with peak- and timing-detection. The cathode's timing can be measured in three different ways: the first is based on multiple thresholds on the charge amplifier's voltage output; the second uses the threshold crossing of a fast-shaped signal; and the third measures the peak amplitude and timing from a bipolar shaper. With its power of 2 mW per channel the ASIC measures, on a CZT sensor connected and biased, charges up to 100 W with an electronic resolution better than 200 e(-) rms. Our preliminary spectral measurements applying a simple cathode/anode ratio correction demonstrated a single-pixel resolution of 4.8 keV (0.72 %) at 662 keV, with the electronics and leakage current contributing in total with 2.1 keV. C1 [De Geronimo, Gianluigi; Vernon, Emerson; Ackley, Kim; Fried, Jack; O'Connor, Paul] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. [Dragone, Angelo] Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY USA. [Herman, Cedric; Zhang, Feng] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI USA. RP De Geronimo, G (reprint author), Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. EM degeronimo@bnl.goy NR 31 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 32 EP 41 DI 10.1109/NSSMIC.2007.4436284 PG 10 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400006 ER PT S AU Byrum, K Anderson, J Drake, G Ertley, C Frisch, H Sanders, H Tang, F Va'vra, J AF Byrum, Karen Anderson, John Drake, Gary Ertley, Camden Frisch, Henry Sanders, Harold Tang, Fukun Va'vra, Jerry GP IEEE TI Timing measurements of a micro-channel plate photomultiplier incorporating a novel equal-time anode structure SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have measured the timing properties on two new 2-inch micro-channel plate photomultiplier tubes from Photonis; one tube with 25 micron pores and the other tube having 10 micron pores. The 10 micron pore tube uses a novel charge-collection scheme at the anode to provide equal arrival time of the signal independent of the hit position of incident light on the face of the tube. We have performed these measurements using a Hamamatsu PLP-10 picosecond laser and a commercial Camac readout electronics system. We present these results, and compare timing properties to a standard Burle/Photonis 85011 micro-channel plate photomultiplier tube having 25 micron pores. We set an upper limit on the resolution of 9.1psec with Npe approximately 50. C1 [Byrum, Karen; Anderson, John; Drake, Gary; Ertley, Camden] Argonne Natl Lab, Argonne, IL 60439 USA. RP Byrum, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM byrum@anl.gov; jta@anl.gov; drake@anl.gov; camper545@gmail.com; Frisch@hep.uchicago.edu; harold@frodo.uchicago.edu; tang@frodo.uchicago.edu; jjv@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 80 EP 82 DI 10.1109/NSSMIC.2007.4436292 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400014 ER PT S AU Marleau, P Brennan, J Krenz, K Mascarenhas, N Mrowka, S AF Marleau, Peter Brennan, James Krenz, Kevin Mascarenhas, Nicholas Mrowka, Stanley GP IEEE TI Advances in imaging fission neutrons with a neutron scatter camera SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Special nuclear material (SNM) emits high energy radiation during active and passive interrogation. This radiation can be imaged thus allowing visualization of shielded and/or smuggled SNM. Lower backgrounds and higher penetration through hi-Z materials make neutrons the preferred detectable in many scenarios. We have developed a neutron scatter camera that directly images fast fission neutrons from SNM sources while simultaneously measuring energy spectra. We have made many significant advances in the design and implementation of such instruments leading to an over 30 fold improvement in sensitivity. We will present results from our detector including analysis techniques that we have developed for neutron imaging and particle discrimination techniques. We will discuss camera calibration and performance under realistic threat detection scenarios, and future prospects in this field. C1 [Marleau, Peter; Brennan, James; Krenz, Kevin; Mascarenhas, Nicholas; Mrowka, Stanley] Sandia Natl Labs, Livermore, CA 94551 USA. RP Marleau, P (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. NR 1 TC 2 Z9 2 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 170 EP 172 DI 10.1109/NSSMIC.2007.4436310 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400032 ER PT S AU Vanier, PE Forman, L Dioszegi, I Salwen, C Ghosh, VJ AF Vanier, Peter E. Forman, Leon Dioszegi, Istvan Salwen, Cynthia Ghosh, Vinita J. GP IEEE TI Calibration and testing of a large-area fast-neutron directional detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have developed a new directional fast-neutron detector based on double proton recoil in two separated planes of plastic scintillators with continuous position-sensitive readout in one of two dimensions. This method allows the energy spectrum of the neutrons to be measured by a combination of peak amplitude in the first plane and time of flight to the second plane. The planes are made up of 100-cm long, 10-cm high paddles with photomultipliers at both ends, so that the location of an event along the paddle can be estimated from the time delay between the optical pulses detected at the two ends. The direction of the scattered neutron can be estimated from the locations of two time-correlated events in the two planes, and the energy lost in the first scattering event can be estimated from the pulse amplitude in the first plane. The direction of the incident neutron can then be determined to lie on a cone whose angle is determined by the kinematic equations. The superposition of many such cones generates an image that indicates the presence of a localized source. Setting upper and lower limits on time of flight and energy allows discrimination between gamma rays, muons and neutrons. Monte Carlo simulations were performed to determine factors affecting the expected angular resolution and efficiency. These models show that this design has a lower energy limit for useful directional events at about 250 keV, because lower energy neutrons are likely to scatter more than once in the first plane. C1 [Vanier, Peter E.; Dioszegi, Istvan; Salwen, Cynthia; Ghosh, Vinita J.] Brookhaven Natl Lab, Nonproliferat & Natl Secur Dept, Upton, NY 11973 USA. [Forman, Leon] consultant Brookhaven Natl Lab, Focus Technol, Millersville, PA USA. RP Vanier, PE (reprint author), Brookhaven Natl Lab, Nonproliferat & Natl Secur Dept, Upton, NY 11973 USA. EM vanier@bnl.gov FU U.S. Department of Energy, Office of Nonproliferation Research and Development; LLC U.S. Department of Energy [DE-AC02-98CH1-886] FX We are grateful to Sara Pozzi of ORNL for performing independent simulations of the double scatter configuration, confirming our estimates of efficiency.; This work was supported by U.S. Department of Energy, Office of Nonproliferation Research and Development.; This manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U.S. Department of Energy. The United States Government retains, and the publisher, by accepting the article for publication, acknowledges, a world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. NR 4 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 179 EP 184 DI 10.1109/NSSMIC.2007.4436312 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400034 ER PT S AU Blackburn, B Jones, J Watson, S Johnson, J Gerts, D Moss, C Waters, L Ianakiev, K Mihalczo, J Hausladen, P Pozzi, S Flaska, M Clarke, S Hunt, A Thompson, S Kinlaw, M AF Blackburn, Brandon Jones, James Watson, Scott Johnson, James Gerts, David Moss, Cal Waters, Laurie Ianakiev, Kiril Mihalczo, John Hausladen, Paul Pozzi, Sara Flaska, Marek Clarke, Shaun Hunt, Alan Thompson, Scott Kinlaw, Matt GP IEEE TI Detection of special nuclear material by means of promptly emitted radiation following photonuclear stimulation SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Techniques have been developed to exploit abundant prompt emissions from photonuclear reactions for the identification of special nuclear material (SNM). These enhancements are designed to reduce inspections times and delivered dose in systems which have, historically, relied solely on delayed emissions. Experimental evidence is presented for prompt neutron time-of-flight measurements, neutron/photon correlations in multiple detectors, and novel detector development, specifically LaBr3 scintillators with new gating and buffering circuits to identify prompt gamma signatures. Significant and specific signatures indicative of the presence of SNM can be distinguished for the prompt neutron time-of-flight experiment and the neutron/photon correlations in multiple detectors. C1 [Blackburn, Brandon; Jones, James; Watson, Scott; Johnson, James; Gerts, David; Moss, Cal] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Moss, Cal; Waters, Laurie; Ianakiev, Kiril] Losa Alamos NatlLab, Los Alamos, NM USA. [Mihalczo, John; Hausladen, Paul; Pozzi, Sara; Flaska, Marek; Clarke, Shaun] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Hunt, Alan; Thompson, Scott; Kinlaw, Matt] Idaho Accelerator Ctr, Pocatello, ID USA. RP Blackburn, B (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM brandon.blackbum@inl.gov RI Johnson, James/B-9689-2017 OI Johnson, James/0000-0002-3434-4413 FU DNDO [HSHQDC-07-X-00172] FX The authors would like to acknowledge the support of DNDO for funding this project through contract: HSHQDC-07-X-00172. NR 3 TC 1 Z9 1 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 192 EP 198 DI 10.1109/NSSMIC.2007.4436314 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400036 ER PT S AU Flaska, M Pozzi, SA AF Flaska, Marek Pozzi, Sara A. GP IEEE TI Measurement and analysis system for the identification of shielded neutron sources SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Accurate identification of radioactive materials is essential in areas such as nuclear nonproliferation, international safeguards, nuclear material control and accountability, and national security. Recently, a new application of a technique that acquires neutron pulse-height spectra using a liquid scintillation detector, a digitizer, and an optimized pulse shape discrimination technique was proposed. The method can be used for accurate identification of neutron sources such as Cf-252, Am-Be, and Am-Li. All these sources were investigated in combination with several shielding blocks made of polyethylene and lead. From the results it is apparent that source identification is possible by the data inspection of the measured pulse-height distributions. The general slope of the distributions can be used for the source identification, and all sources tested can be accurately identified. All measured pulse-height distributions were also compared to distributions simulated with the MCNP-PoliMi code and very good agreement was achieved. C1 [Flaska, Marek; Pozzi, Sara A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Flaska, M (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 199 EP 203 DI 10.1109/NSSMIC.2007.4436315 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400037 ER PT S AU Basaglia, T Bell, ZW Dressendorfer, PV Larkin, A Pia, MG AF Basaglia, T. Bell, Z. W. Dressendorfer, P. V. Larkin, A. Pia, M. G. GP IEEE TI Writing software or writing scientific articles? SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID DETECTOR; SIMULATION; LEP AB An analysis of publications related to high energy physics computing in refereed journals is presented. The distribution of papers associated to various fields of computing relevant to high energy physics is critically analyzed. The relative publication rate of software papers is evaluated in comparison to other closely related physics disciplines, such as nuclear physics, radiation protection and medical physics, and to hardware publications. The results hint to the fact that, in spite of the significant effort invested in high energy physics computing and its fundamental role in the experiments, this research area is underrepresented in scientific literature; nevertheless the analysis of citations highlights the significant impact of software publications in experimental research. C1 [Basaglia, T.] CERN, CH-1211 Geneva 23, Switzerland. [Bell, Z. W.] Oak Ridge Natl Lab, LLC, POB 2008, Oak Ridge, TN 37830 USA. [Dressendorfer, P. V.] TNS, London, England. [Pia, M. G.] INFN, I-16146 Genoa, Italy. [Larkin, A.] IEEE, Piscataway, NJ 08854 USA. RP Basaglia, T (reprint author), CERN, CH-1211 Geneva 23, Switzerland. EM MariaGrazia.Pia@ge.infn.it OI Pia, Maria Grazia/0000-0002-3579-9639; Bell, Zane/0000-0003-1115-8674 NR 43 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 219 EP 226 DI 10.1109/NSSMIC.2007.4436319 PG 8 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400041 ER PT S AU Simon, F Kelsey, J Kohl, M Majka, R Plesko, M Underwood, D Sakuma, T Smirnov, N Spinka, H Surrow, B AF Simon, F. Kelsey, J. Kohl, M. Majka, R. Plesko, M. Underwood, D. Sakuma, T. Smirnov, N. Spinka, H. Surrow, B. GP IEEE TI Triple GEM detectors for the forward tracker in STAR SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Future measurements of the flavor-separated spin structure of the proton via parity-violating W boson production at RHIC require an upgrade of the forward tracking system of the STAR detector. This upgrade will allow the reconstruction of the charge sign of electrons and positrons produced from decaying W bosons. A design based on six large area triple GEM disks using GEM foils produced by Tech-Etch Inc. has emerged as a cost-effective solution to provide the necessary tracking precision. We report first results from a beam test of three test detectors using Tech-Etch produced GEM foils and a laser etched two dimensional strip readout. The detectors show good operational stability, high efficiency and a spacial resolution of around 70 mu m or better, exceeding the requirements for the forward tracking upgrade. The influence of the angle of incidence of the particles on the spatial resolution of the detectors has also been studied in detail. C1 [Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. [Kelsey, J.; Kohl, M.; Majka, R.; Plesko, M.] MIT, Lab Nucl Sci, Cambridge, MA 02139 USA. [Majka, R.; Smirnov, N.] Yale Univ, Dept Phys, New Haven, CT 06520 USA. [Underwood, D.; Spinka, H.] Argonne Natl Lab, Argonne, IL USA. RP Simon, F (reprint author), Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. EM frank.simon@universe-cluster.de FU US-DOE SBIR [DE-FG02-05ER84169] FX The authors thank Fermilab for the allocation of beam time and Eric Ramberg and colleagues for generous support during the test beam activities. The development of GEM foil production at Tech-Etch is supported by US-DOE SBIR grant DE-FG02-05ER84169 NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 234 EP 238 DI 10.1109/NSSMIC.2007.4436321 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400043 ER PT S AU Galea, R Dodd, J Willis, W Rehak, P Tcherniatine, V AF Galea, R. Dodd, J. Willis, W. Rehak, P. Tcherniatine, V. GP IEEE TI Light yield measurements of GEM avalanches at cryogenic temperatures and high densities in neon based gas mixtures SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Gas Electron Multipliers (GEM) are being used in the baseline readout design of a cryogenic Time Projection Chamber (TPC). The GEMs provide amplification of an ionization charge signal but rather than reading out the charge signal, the proportional light produced in the GEM avalanche will be imaged using commercially available low-noise CCD cameras. Our measurements of neon-based gas mixtures at cryogenic temperatures indicate that visible light yields of one photon per avalanche electron are available. Light yields in neon based gas mixtures will be presented as well as spectral measurements of the light emission. We have been successful in imaging alpha tracks at 77K and are actively working on imaging beta tracks at 45 K and below. C1 [Galea, R.; Dodd, J.; Willis, W.] Columbia Univ, Nevis Labs, New York, NY 10027 USA. [Rehak, P.; Tcherniatine, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Galea, R (reprint author), Columbia Univ, Nevis Labs, New York, NY 10027 USA. FU NSF [PHY00-98826, Y05-00492] FX This work was supported by NSF grants PHY00-98826 and PHY05-00492. NR 4 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 239 EP 241 DI 10.1109/NSSMIC.2007.4436322 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400044 ER PT S AU Tremsin, AS Vallerga, JV McPhate, JB Siegmund, OHW Hull, JS Feller, WB Crow, L Cooper, RG AF Tremsin, Anton S. Vallerga, John V. McPhate, Jason B. Siegmund, Oswald H. W. Hull, Jeff S. Feller, W. Bruce Crow, Lowell Cooper, Ron G. GP IEEE TI High resolution neutron imaging at high counting rates with noiseless readout SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID MICROCHANNEL-PLATE DETECTORS; TEMPORAL RESOLUTION; DIFFRACTION; RADIOGRAPHY; TOMOGRAPHY; EFFICIENCY; MEDIPIX2; SQUARE; PART AB We describe the design and report on the experimental results of a novel thermal and cold neutron imaging detector utilizing neutron sensitive (B-10-doped) microchannel plates (MCPs). In this detector, the incoming neutron interaction products produce secondary electrons at the pores adjacent to the absorption point within the MCP glass. This electron signal is then multiplied by a stack of conventional MCPs within those adjacent pores limiting the spread of the signal to less than two pore diameters (currently 6-10 mu m pores on 8-12 mu m centers). The event position then can be encoded by a number of readout techniques already developed for photon/charged particle counting applications. This paper presents the results of experimental evaluation of neutron sensing MCP detector with Medipix2 readout allowing operation at high counting rate mode (>100 MHz level) at a spatial resolution limited by the 55 mu m pixel size of the Medipix2 readout. Other attractive features of MCP neutron detectors are their high detection efficiency (approaching 50% levels) for thermal and cold neutrons and the absence of readout noise. C1 [Tremsin, Anton S.; Vallerga, John V.; McPhate, Jason B.; Siegmund, Oswald H. W.; Hull, Jeff S.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Feller, W. Bruce] NOVA Scientific Inc, Sturbridge, MA 01566 USA. [Crow, Lowell; Cooper, Ron G.] Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RP Tremsin, AS (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. EM ast@ssl.berkeley.edu; jvv@ssl.berkeley.edu; mcphate@ssl.berkeley.edu; ossy@ssl.berkeley.edu; jeffh@ssl.berkeley.edu; bfeller@novascientific.com; crowmljr@ornl.gov; coopeffg@ornl.gov FU U.S. Department of Energy [DE-FG02-07ER86322] FX This work was supported in part by the U.S. Department of Energy under Grant No. DE-FG02-07ER86322. NR 27 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 270 EP 275 DI 10.1109/NSSMIC.2007.4436329 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400051 ER PT S AU Wu, JY Hansen, S Shi, ZH AF Wu, Jinyuan Hansen, Sten Shi, Zonghan GP IEEE TI ADC and TDC implemented using FPGA SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE front end electronics; TDC; ADC; deserializer; FPGA firmware AB Several tests of FPGA devices programmed as analog waveform digitizers are discussed. The ADC uses the ramping-comparing scheme. A multi-channel ADC can be implemented with only a few resistors and capacitors as external components. A periodic logic levels are shaped by passive RC network to generate exponential ramps. The FPGA differential input buffers are used as comparators to compare the ramps with the input signals. The times at which these ramps cross the input signals are digitized by time-to-digital-converters (TDCs) implemented within the FPGA. The TDC portion of the logic alone has potentially a broad range of HEP/nuclear science applications. A 96-channel TDC card using FPGAs as TDCs being designed for the Fermilab MIPP electronics upgrade project is discussed. A deserializer circuit based on multi-sampling circuit used in the TDC, the "Digital Phase Follower" (DPF) is also documented. C1 [Wu, Jinyuan; Hansen, Sten; Shi, Zonghan] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Wu, JY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 12 TC 6 Z9 6 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 281 EP 286 DI 10.1109/NSSMIC.2007.4436331 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400053 ER PT S AU Bowen, JD Bandstra, ME Boggs, SE Zoglauer, A Wunderer, CB Amman, MS Luke, PN AF Bowen, Jason D. Bandstra, Mark E. Boggs, Steven E. Zoglauer, Andreas Wunderer, Cornelia B. Amman, Mark S. Luke, Paul N. GP IEEE TI Depth dependent background measurements with NCT SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID GAMMA-RAY SPECTROMETERS; TELESCOPE; SPECTRUM; MODEL AB The Nuclear Compton Telescope (NCT) is a balloon-borne soft gamma-ray (0.2 MeV to 10 MeV) Germanium Compton Telescope (GCT) designed to study astrophysical sources of nuclear line emission and polarization. A prototype instrument was successfully launched from Ft. Sumner, NM on June 1, 2005. The NCT prototype consists of two 3D position sensitive High-Purity-Germanimn (HPGe) strip detectors fabricated with amorphous Ge contacts. The compact design and new technologies allow NCT to achieve high efficiencies with excellent spectral resolution and background reduction. Here we present a study of approximately 8 hours of background measurements made from a ground altitude of 1.2 km to an average float altitude of 40 km. The expected contributions to the background component are discussed, especially in light of detailed Monte Carlo simulations incorporating complete depth dependent environmental inputs, including cosmic and atmospheric photon distributions, primary cosmic rays (protons), cosmic ray secondaries (protons and neutrons), and activation induced components. The contributions of the leptonic component to the total observed background is also discussed. Special emphasis is placed on the 511 keV annihilation line, and a first attempt to image this background component is presented. C1 [Bowen, Jason D.; Bandstra, Mark E.; Boggs, Steven E.; Zoglauer, Andreas; Wunderer, Cornelia B.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Amman, Mark S.; Luke, Paul N.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Bowen, JD (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. EM jdbowen@ssl.berkeley.edu RI Boggs, Steven/E-4170-2015 OI Boggs, Steven/0000-0001-9567-4224 FU NASA [NNG04WC38G]; National Space Organization (NSPO) in Taiwan [95-NSPO(B)-SP-FA04-01] FX The NCT project is funded by NASA under Grant NNG04WC38G for the NCT-US team and by the National Space Organization (NSPO) in Taiwan under Grant 95-NSPO(B)-SP-FA04-01 for the NCT-Taiwan team. We would like to thank D. F. Smart and M. A. Shea for providing us with the trajectory tracing code TJ2005 used to calculate the cutoff rigidities for this flight. NR 25 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 436 EP 444 DI 10.1109/NSSMIC.2007.4436364 PG 9 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400086 ER PT S AU Tanaka, T Arimoto, M Axelsson, M Bjornsson, CI Bogaert, G Carlson, P Cooney, M Craig, W Engdegard, O Fukazawa, Y Gunji, S Hjalmarsdotter, L Kamae, T Kanai, Y Kataoka, J Katsuta, J Kawai, N Kazejev, J Kiss, M Klamra, W Larsson, S Madejski, G Bettolo, CM Mizuno, T Ng, J Nomachi, M Odaka, H Pearce, M Ruckman, L Ryde, F Tajima, H Takahashi, H Takahashi, T Thurston, T Ueno, M Varner, G Ylinen, T Yoshida, H Yuasa, T AF Tanaka, T. Arimoto, M. Axelsson, M. Bjornsson, C. -I. Bogaert, G. Carlson, P. Cooney, M. Craig, W. Engdegard, O. Fukazawa, Y. Gunji, S. Hjalmarsdotter, L. Kamae, T. Kanai, Y. Kataoka, J. Katsuta, J. Kawai, N. Kazejev, J. Kiss, M. Klamra, W. Larsson, S. Madejski, G. Bettolo, C. Marini Mizuno, T. Ng, J. Nomachi, M. Odaka, H. Pearce, M. Ruckman, L. Ryde, F. Tajima, H. Takahashi, H. Takahashi, T. Thurston, T. Ueno, M. Varner, G. Ylinen, T. Yoshida, H. Yuasa, T. GP IEEE TI Data acquisition system for the PoGOLite astronomical hard X-ray polarimeter SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The PoGOLite is a new balloon-borne instrument to measure the polarization of hard X-rays/soft gamma-rays in the 25-80 keV energy range for the first time. In order to detect the polarization, PoGOLite measures the azimuthal angle asymmetry of Compton scattering and the subsequent photo-absorption in an array of detectors. This array consists of 217 well-type phoswich detector cells (PDCs) surrounded by a side anti-coincidence shield (SAS) composed of 54 segments of BGO crystals. At balloon altitude, the intensity of backgrounds due to cosmic-ray charged particles, atmospheric gamma-rays and neutrons is extremely high, typically a few hundred Hz per unit. Hence the data acquisition (DAQ) system of PoGOLite is required to handle more than 270 signals simultaneously, and detect weak signals from astrophysical objects (100mCrab, 1.5 cs(-1) in 25-80 keV) under such a severe environment. We have developed a new DAQ system consisting of front-end electronics, waveform digitizer, Field Programmable Gate Array (FPGA) and a microprocessor. In this system, all output signals of PDC / SAS are fed into individual charge-sensitive amplifier and then digitized to 12 bit accuracy at 24 MSa/s by pipelined analog to digital converters. A DAQ board for the PDC records waveforms which will be examined in an off-line analysis to distinguish signals from the background events and measure the energy spectrum and polarization of targets. A board for the SAS records hit pattern to be used for background rejection. It also continuously records a pulse-height analysis (PHA) histogram to monitor incident background flux. These basic functions of the DAQ system were verified in a series of beam tests. C1 [Tanaka, T.; Fukazawa, Y.; Mizuno, T.; Takahashi, H.; Yoshida, H.] Hiroshima Univ, Hiroshima 7398526, Japan. [Arimoto, M.; Kanai, Y.; Kataoka, J.; Kawai, N.; Ueno, M.] Tokyo Inst Technol, Tokyo 152, Japan. [Axelsson, M.; Bjornsson, C. -I.; Hjalmarsdotter, L.; Larsson, S.; Ryde, F.] Stockholm Univ, SE-10691 Stockholm, Sweden. [Bogaert, G.] Ecole Polytech, F-91128 Palaiseau, France. [Kiss, M.; Pearce, M.] Royal Inst Technol, S-10691 Stockholm, Sweden. [Craig, W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Gunji, S.] Yamagata Univ, Yamagata 990, Japan. [Kamae, T.; Madejski, G.; Ng, J.; Tajima, H.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. [Nomachi, M.] Osaka Univ, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan. [Katsuta, J.; Odaka, H.; Takahashi, T.] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan. [Thurston, T.] Thurston Co, Seattle, WA 98125 USA. [Cooney, M.; Ruckman, L.; Varner, G.] Univ Hawaii, Honolulu, HI 96822 USA. [Yuasa, T.] Univ Tokyo, Tokyo 1130033, Japan. RP Tanaka, T (reprint author), Hiroshima Univ, Hiroshima 7398526, Japan. EM tanaka@hep01.hepl.hiroshima-u.ac.jp NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 445 EP 449 DI 10.1109/NSSMIC.2007.4436365 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400087 ER PT S AU Myjak, MJ Morris, SJ Slaugh, RW McCann, JM Kirihara, LJ Rohrer, JS Burghard, BJ Seifert, CE AF Myjak, Mitchell J. Morris, Scott J. Slaugh, Ryan W. McCann, Jason M. Kirihara, Leslie J. Rohrer, John S. Burghard, Brion J. Seifert, Carolyn E. GP IEEE TI Electronics system for the GammaTracker handheld CdZnTe detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We are currently developing a handheld radioisotope identifier containing eighteen position-sensitive CdZnTe crystals. In addition to isotope identification, the device performs basic Compton imaging to determine the location of suspected sources. This paper gives an overview of the electronics system we have designed for this instrument. We use specialized application-specific integrated circuits to preprocess the outputs of each CdZnTe crystal. A low-power microprocessor runnig Windows CE drives the user interface and implements the isotope identification and directionality computations. Finally, we use a field-programmable gate array to perform the computationally intensive imaging tasks in real time. C1 [Myjak, Mitchell J.; Morris, Scott J.; Slaugh, Ryan W.; McCann, Jason M.; Kirihara, Leslie J.; Rohrer, John S.; Burghard, Brion J.; Seifert, Carolyn E.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Myjak, MJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. OI Myjak, Mitchell/0000-0002-3807-3542 NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 508 EP 510 DI 10.1109/NSSMIC.2007.4436380 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400102 ER PT S AU Myjak, MJ Rohrer, JS Morris, SJ Woodring, ML Ely, JH AF Myjak, Mitchell J. Rohrer, John S. Morris, Scott J. Woodring, Mitchell L. Ely, James H. GP IEEE TI Pulse processing system for the RADMAP radiation modulation aperture imager SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We are currently developing a portable radiation imager for emergency responders. The instrument contains a position-sensitive photomultiplier tube with a thin CsI(Na) scintillator and a tungsten radiation modulation aperture. As part of this project, we have designed a novel pulse processing system to record the amplitude and position of incident events. This system consists of four charge-to-pulse-width converters that transfer time-modulated digital pulses to a field-programmable gate array. The design can process data at count rates exceeding 40,000 events per second and transmit data over an Ethernet link at 1 Gb/sec. C1 [Myjak, Mitchell J.; Rohrer, John S.; Morris, Scott J.; Woodring, Mitchell L.; Ely, James H.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Myjak, MJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. OI Myjak, Mitchell/0000-0002-3807-3542 NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 511 EP 514 DI 10.1109/NSSMIC.2007.4436381 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400103 ER PT S AU Lewis, P Barr, D Cooper, G Meyer, E Shapiro, A Shurter, R Trouw, F AF Lewis, Paul Barr, Dean Cooper, Gary Meyer, Elizabeth Shapiro, Alan Shurter, Robert Trouw, Frans GP IEEE TI Neutron spectrometer automation at the Lujan Center SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Lujan Center at the Los Alamos National Laboratory's Neutron Science Center (LANSCE) is a spallation neutron source where research in materials and biological sciences is conducted on time-of-flight neutron scattering spectrometers on eleven beam lines. Execution of an experiment on a neutron spectrometer involves 1) control of the sample environment equipment, 2) measurement of the scattered neutrons, and 3) operation of the beam line itself. This paper describes the automation and coordination of these functions that is essential to effective conduct of experiments. C1 [Lewis, Paul; Barr, Dean; Cooper, Gary; Meyer, Elizabeth; Shapiro, Alan; Shurter, Robert; Trouw, Frans] Los Alamos Natl Lab, Neutron Sci Ctr LANSCE, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87544 USA. RP Lewis, P (reprint author), Los Alamos Natl Lab, Neutron Sci Ctr LANSCE, Manuel Lujan Jr Neutron Scattering Ctr, POB 1663, Los Alamos, NM 87544 USA. EM lewis@lanl.gov RI Lujan Center, LANL/G-4896-2012 NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 533 EP 535 DI 10.1109/NSSMIC.2007.4436386 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400108 ER PT S AU Underwood, DG Spinka, H Antipov, S Plesko, M Sakuma, T Simon, F Surrow, B AF Underwood, D. G. Spinka, H. Antipov, S. Plesko, M. Sakuma, T. Simon, F. Surrow, B. GP IEEE TI RPC investigation using finely spaced 2-d strip readout SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB RPCs are in use for many high energy physics applications where there is no need for fine spatial resolution. However, there are applications such as digital calorimetry where the dimension of the induced charge at pick-up pads is of interest. Such calorimetry is proposed for eg, Particle flow calorimetrey at the ILC. While there are both experiments and calculations which address this to some extent, we have been able to read out a single gap RPC using fine pitch laser etched two-dimensional strip readout as used in GEM tracking. This measurement was made in the Fermilab test beam in conjunction with the GEM tracking test for the STAR upgrade. We discuss both data and electrostatic simulations of the signal from a single gap glass RPC. C1 [Underwood, D. G.; Spinka, H.; Antipov, S.] Argonne Natl Lab, HEP, 9700 S Cass Ave, Argonne, IL 60439 USA. [Simon, F.] Univ Munich, Excellence Cluster Univ, Munich, Germany. Max Planck Inst Phys & Astrophys, Munich, Germany. [Plesko, M.; Sakuma, T.; Simon, F.; Surrow, B.] MIT, Lab Nuclear Sci, Cambridge, MA 02139 USA. RP Underwood, DG (reprint author), Argonne Natl Lab, HEP, 9700 S Cass Ave, Argonne, IL 60439 USA. EM dgu@hep.anl.gov FU Argonne, a U.S. Department of Energy Office of Science laboratory [DE-AC02-06CH11357] FX Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 618 EP 622 DI 10.1109/NSSMIC.2007.4436409 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400131 ER PT S AU Azmoun, B Rumore, M Sinsheimer, J Smirnov, N Stoll, S Woody, C AF Azmoun, B. Rumore, M. Sinsheimer, J. Smirnov, N. Stoll, S. Woody, C. GP IEEE TI A measurement of scintillation in CF4 using GEM foils and a CsI photocathode SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The absolute photon yield of scintillation light produced by highly ionizing particles in pure CF4 has been measured using a photosensitive GEM detector. The detector consists of two standard GEMs and a CsI coated GEM that acts as a photocathode and is sensitive to the scintillation light produced in CF4 at 160 nm. The light yield is determined in terms of the number of scintillation photons produced per MeV of energy deposited in the gas by a 5.5 MeV alpha particle using the measured gain and quantum efficiency of the GEM detector, the solid angle acceptance of the detector, and the measured energy loss in the gas. Preliminary measurements show that the yield determined using this method is in very good agreement with other measurements. Scintillation light in CF4 can potentially play an important role in the performance of the PHENIX Hadron Blind Detector (HBD) as well as other Cherenkov detectors, and its effect on the operation of the HBD at RHIC will be discussed. C1 [Azmoun, B.; Stoll, S.; Woody, C.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Rumore, M.] Worcester Polytech Inst, Worcester, MA 01609 USA. [Sinsheimer, J.] Ohio State Univ, Columbus, OH 43210 USA. [Smirnov, N.] Yale Univ, New Haven, CT 06520 USA. RP Azmoun, B (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM azmoun@bnl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 623 EP 626 DI 10.1109/NSSMIC.2007.4436410 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400132 ER PT S AU O'Toole, JA AF O'Toole, Joseph A. GP IEEE TI Advances in neutron science instrumentation at the Los Alamos Neutron Science Center (LANSCE) SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Background: The Lujan Neutron Scattering Center within the Los Alamos Neutron Science Center (LANSCE) develops instrumentation in support of research employing neutrons to investigate issues of interest to its user community. The Spectrometer for Materials Research at Temperature and Stress (SMARTS) neutron diffiractometer is optimized for the study of engineering materials. SMARTS automated sample positioning and data collection system concept: The system makes use of a pair of digital theodilites, a 4 axis sample positioning stage, the SolidWorks* CAD software with a custom add-in program, a calibration process, and a sample setup process. The system provides automatic positioning of the test point on the sample such that the neutron beam will interest that point for data collection. When one considers that for SMARTS the samples are contained within a tank that provides a desired test atmosphere, test temperature, and the sample is loaded to the desired strain or stress by the integral tensile machine, then one can see the advantages of this automated sample positioning and data collection system. Doubling the performance of the Lujan Center cold neutron source: The Lujan center obtains its source of neutrons through the use of a Target Moderator Reflector System (TMRS). The TMRS includes a pair of targets, six moderators, beryllium reflectors, a window insert, and an instrument insert. The cold neutron moderator has a water premoderator sized to reduce the heat load on the LH cryogenic system to the same level as that of the MK 11 design so that a costly increase in cooling capability is avoided. Next a liquid hydrogen filled moderator tank is employed to create the cold neutrons. This is followed by a beryllium reflector/filter that is contact cooled to near liquid hydrogen temperature. Using this arrangement, and maintaining the same particle beam parameters as for the MK H design, the cold neutron performance is increased by a factor of two. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP O'Toole, JA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM otoole@lant.gov NR 0 TC 0 Z9 0 U1 2 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 627 EP 632 DI 10.1109/NSSMIC.2007.4436411 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400133 ER PT S AU Hohhnann, M Baksay, G Guragain, S Andreev, V Yang, XF Bellinger, J Carlsmith, D Feyzi, F Loveless, RJ Northacker, D Eartly, DP Prokofiev, O Sknar, V AF Hohhnann, Marcus Baksay, Gyoengyi Guragain, Samir Andreev, Valery Yang, Xiaofeng Bellinger, James Carlsmith, Duncan Feyzi, Farshid Loveless, Richard J. Northacker, David Eartly, David P. Prokofiev, Oleg Sknar, Vladimir GP IEEE TI Aligning the CMS muon endcap detector with a system of optical sensors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The positions and orientations of one sixth of 468 large cathode strip chambers in the endcaps of the CNIS muon detector are directly monitored by several hundred sensors including 2-D optical sensors with linear CCDs illuminated by cross-hair lasers. Position measurements obtained by photogrammetry and survey under field-off conditions show that chambers in the +Z endcap have been placed on the yoke disks with an average accuracy of about +/- 1 mm in all 3 dimensions. We reconstruct absolute Z(CMS)-positions and orientations of chambers at B=0T and B=4T using data from the optical allgnment system. The measured position resolution and sensitivity to relative motion is similar to 60 pm. The precision for measuring chamber positions taking into account mechanical tolerances is similar to 270 mu m. Comparing reconstruction of optical alignment data and photogrammetry measurements at B=0T indicates an accuracy of similar to 680 mu m currently achieved with the hardware alignment system. Optical position measurements at B=4T show significant chamber displacements of up to 13 mm due to yoke disk deformation. C1 [Hohhnann, Marcus; Baksay, Gyoengyi; Guragain, Samir] Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL 32901 USA. [Andreev, Valery; Yang, Xiaofeng] Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90095 USA. [Bellinger, James; Carlsmith, Duncan; Feyzi, Farshid; Loveless, Richard J.; Northacker, David] Univ Wisconsin, Dept Phys, Madison, WI USA. [Eartly, David P.; Prokofiev, Oleg] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Sknar, Vladimir] Peterpersburg Nuclear Phys Inst, St Petersburg, Russia. RP Hohhnann, M (reprint author), Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL 32901 USA. EM hohlmann@fit.edu NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 657 EP 662 DI 10.1109/NSSMIC.2007.4436418 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400140 ER PT S AU Ruben, A Hoagland, TE Fox, R Kerr, PL Montermann, G Schneider, R AF Ruben, Andreas Hoagland, Timothy E. Fox, Ron Kerr, Phillip L. Montermann, Gregor Schneider, Robert GP IEEE TI A new four channel pulse shape discriminator SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB A renewed interest in neutron - gamma discrimination and the need to process rates up to several NMZ per channel led to the development of a new, four channel pulse shape discriminator (M) in 1/12 NIM format. By revisiting old techniques and running simulations of new ideas, it was determined that the best PSD performance is obtained by measuring the time between the rising edge of the pulse and the intersection point of the curves of the integrated short component with the trailing edge of the pulse. Pulse shape discrimination can be performed at up to 4NMz detector rate. The module was tested with different neutron and gamma sources as well as at high neutron flux and was found to provide good energy independent neutron / gamma discrimination in a wide energy range with low dead time. A 96-channel system using 24 of these modules is now being operated C1 [Ruben, Andreas; Hoagland, Timothy E.] WIENER, Pl & Baus Ltd, Springfield, OH 45505 USA. [Fox, Ron] Michigan State Univ, E Lansing, MI 48824 USA. [Kerr, Phillip L.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Montermann, Gregor; Schneider, Robert] Mesytec GmbH & Co, D-85640 Putzbrunn, Germany. RP Ruben, A (reprint author), WIENER, Pl & Baus Ltd, Springfield, OH 45505 USA. EM aruben@wiener-us.com; thoagland@wiener-us.com; fox@nscl.msu.edu; kerr12@llnl.gov; g.monterman@mesytec.com; r.schneider@mesytec.com NR 3 TC 4 Z9 5 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 681 EP 684 DI 10.1109/NSSMIC.2007.4436424 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400146 ER PT S AU Turqueti, M Rivera, R Chramowicz, J Prosser, A AF Turqueti, M. Rivera, R. Chramowicz, J. Prosser, A. GP IEEE TI Study of alternative serial powering systems for the future ILC tracker SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The International Linear Accelerator (ILC) is the currently proposed electron-positron linear collider to complement the proton-proton Large Hadron Collider (LHC) located at CERN. One of the main problems foreseen for the ILC detectors is the need for a low material budged on the interaction region. Also, due to its foreseen high density electronics on the tracker, a more efficient way of powering the system is required. In this paper we describe a first step for the development of a power system that can fulfill the ILC calls for low mass and low power. Initially a basic mathematic model of the problem is introduced followed by the description of a proposed system test concept. C1 [Turqueti, M.; Rivera, R.; Chramowicz, J.; Prosser, A.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Turqueti, M (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM turqueti@fnal.gov; rrivera@fnal.gov; uplegger@fnal.gov; aprosser@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 699 EP 703 DI 10.1109/NSSMIC.2007.4436429 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400151 ER PT S AU Citterio, M Alberti, F Alimonti, G Andreani, A Andreazza, A Bellina, F Einsweiler, K Kersten, S Lantzsch, K Leyton, M Latorre, S Meroni, C Musial, E Sabatini, F AF Citterio, M. Alberti, F. Alimonti, G. Andreani, A. Andreazza, A. Bellina, F. Einsweiler, K. Kersten, S. Lantzsch, K. Leyton, M. Latorre, S. Meroni, C. Musial, E. Sabatini, F. GP IEEE TI Voltage-regulation stations for the distributed power supply system of the ATLAS pixel detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The innermost part of the ATLAS (A Toroidal LHC ApparatuS) experiment at the LHC (Large Hadron Collider), CERN (Conseil Eurpeenne pour la Recherche Nucleaire), is a pixel detector. To operate the readout electronics and other detector components, a complex power supply and control system is necessary. The paper describes one of the components of which the power supply system is made of: the remotely programmable voltage-regulation station. The specifications, features and characteristics of this custom made electronics sub-rack are described. Particular attention is devoted to the description of the regulator and controller boards. The implemented design solutions allow precise individual adjustment of more than 4000 floating voltages by means of a CAN (Controller Area Network) protocol. The radiation resistance of this electronics made by COTS (components out of the shell) to both gamma and protons is also presented. Statistical analysis of the electrical characteristics of more than 300 boards, equivalent of 4500 voltage channels, is presented. C1 [Citterio, M.; Alberti, F.; Alimonti, G.; Andreani, A.; Andreazza, A.; Latorre, S.; Meroni, C.; Musial, E.; Sabatini, F.] Ist Nazl Fis Nucl, Via Celoria 16, I-20133 Milan, Italy. [Bellina, F.; Kersten, S.; Lantzsch, K.] Univ Wuppertal, Wuppertal, Germany. [Einsweiler, K.; Leyton, M.] LBL, Berkeley, CA USA. RP Citterio, M (reprint author), Ist Nazl Fis Nucl, Via Celoria 16, I-20133 Milan, Italy. EM mauro.citterio@mi.infn.it RI Andreazza, Attilio/E-5642-2011; Leyton, Michael/G-2214-2016 OI Andreazza, Attilio/0000-0001-5161-5759; Leyton, Michael/0000-0002-0727-8107 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 704 EP 708 DI 10.1109/NSSMIC.2007.4436430 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400152 ER PT S AU Azmoun, B Pisani, RP Stoll, S Woody, C AF Azmoun, B. Pisani, R. P. Stoll, S. Woody, C. GP IEEE TI A VUV gas transmission monitor and recirculating gas system for the PHENIX Hadron Blind Detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The PHENIX Hadron Blind Detector (HBD) is a high performance Cherenkov counter that uses pure CF4 to detect electrons in relativistic heavy ion collisions at RHIC. It requires extremely high purity gas in order to achieve a high photoelectron yield, preserve the quality of its cesium iodide photocathodes, and maintain stable gas gain in its GEM detectors. In particular, water and oxygen at even the few ppm level can cause significant optical absorption in the wavelength range from 120-180 nm, which is the region of sensitivity of the CsI photocathodes. In order to ensure good optical transparency and low water and oxygen content of the operating gas, a transmission monitor has been constructed to measure the transmittance of the input and output gases of the HBD. The monitor is based on a McPherson 234/302 VUV spectrometer, along with a custom, computer controlled movable mirror system to measure the transmittance of the gas flowing to and from the detector. The monitor is used in conjunction with a recirculating gas system that is designed to supply high purity gas with minimal consumption. Both the transmission monitor and the recirculating gas system are described, along with their performance when used with the Hadron Blind Detector during the 2006-07 heavy ion run at RHIC. C1 [Azmoun, B.; Pisani, R. P.; Stoll, S.; Woody, C.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Azmoun, B (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 716 EP 719 DI 10.1109/NSSMIC.2007.4436432 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400154 ER PT S AU Kiff, SD Smith, LE Jarman, KD AF Kiff, Scott D. Smith, L. Eric Jarman, Kenneth D. GP IEEE TI Modeling ambient background in complex detection scenarios SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Radiation detection instrumentation is being widely deployed as a countermeasure against the movement and use of radiological dispersal devices and nuclear weapons. Accurate ambient background modeling is critical for accurate simulation of detection scenarios of interest; these background source terms influence minimum detectable limits and are thus a significant factor in overall system performance. Described below are the methods used to characterize ambient background source terms in the at-sea maritime cargo container environment, how statistical distributions on those source terms are defined, and how the resulting radiation fields are calibrated using available measurement data from aboard large ocean-going ships. Although the maritime environment is the demonstration case study, these methods are broadly applicable to modeling of all complex detection scenarios. C1 [Kiff, Scott D.; Smith, L. Eric; Jarman, Kenneth D.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Kiff, SD (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. RI Jarman, Kenneth/B-6157-2011 OI Jarman, Kenneth/0000-0002-4396-9212 NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 765 EP 771 DI 10.1109/NSSMIC.2007.4436441 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400163 ER PT S AU Hartwell, JK McIlwain, MM Kulisek, JA AF Hartwell, John K. McIlwain, Michael M. Kulisek, Jonathan A. GP IEEE TI Design and testing of a unique active compton-suppressed LaBr3(Ce) detector system for improved sensitivity assays of TRU in remote-handled TRU wastes SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The US Department of Energy's transuranic waste inventory includes about 4,500 m(3) of remote-handled TRU (RH-TRU) wastes composed of a variety of containerized waste forms having a contact surface dose rate that exceeds 2 mSv/hr (200 mrem/hr) containing waste materials with a total TRU concentration greater than 3700 Bq/g (100 nCi/g). As part of a research project to investigate the use of active Compton-suppressed room-temperature gamma-ray detectors for direct non-destructive quantification of the TRU content of these RH-TRU wastes, we have designed and purchased a unique detector system using a LaBr3(Ce) primary detector and a NaI(Tl) suppression mantle. The LaBr3(Ce) primary detector is a cylindrical unit similar to 25 mm in diameter by 76 min long viewed by a 38 mm diameter photomultiplier. The NaI(Tl) suppression mantle (secondary detector) is 175 mm. by 175 mm with a center well that accommodates the primary detector. An important feature of this arrangement is the lack of any "can" between the primary and secondary detectors. These primary and secondary detectors are optically isolated by a thin layer (.003 '') of aluminized Kapton. This arrangement virtually eliminates the "dead" material between the primary and secondary detectors, a feature that preliminary modeling indicated would substantially improve the Compton suppression capability of this device. This paper presents both the expected performance of this unit determined from modeling with MCNPX, and the performance measured in our laboratory with radioactive sources. C1 [Hartwell, John K.; McIlwain, Michael M.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Kulisek, Jonathan A.] Ohio State Univ, Dept Nucl Engn, Columbus, OH 43210 USA. RP Hartwell, JK (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM john.hartwell@inl.gov; michael.mcilwain@inl.gov; kulisek.2@osu.edu FU US Department of Energy, Office of Biological and Environmental Reseach, Environmental Management Science Program [DE AE07 05ID14517] FX Research reported in this publication was supported by the US Department of Energy, Office of Biological and Environmental Reseach, Environmental Management Science Program under Contract no. DE AE07 05ID14517. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 772 EP 776 DI 10.1109/NSSMIC.2007.4436442 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400164 ER PT S AU Scates, DM Hartwell, JK Drigert, MW Walter, JB AF Scates, D. M. Hartwell, J. K. Drigert, M. W. Walter, J. B. GP IEEE TI Preliminary results of an on-line, multi-spectrometer fission product monitoring system to support advanced gas reactor fuel testing and qualification in the Advanced Test Reactor at the Idaho National Laboratory SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Advanced Gas Reactor-1 (AGR-1) experiment is the first experiment in a series of eight low-enriched uranium oxycarbide tri-isotropic (TRISO) coated particle fuel (in compact form) experiments scheduled for irradiation in the Advanced Test Reactor (ATR) located at the Idaho National Laboratory (INL). The experiment began irradiation in the ATR with a cycle that reached full power on December 26, 2006 and will continue irradiation for about 2.5 years. Six separate test fuel capsules are being irradiated in an inert sweep gas atmosphere with on-line fission product monitoring of each capsule's effluent to track fission gas emissions from the fuel during irradiation. The online fission product monitoring system incorporates 7 HPGe spectrometers and 7 NaI(TI) gross radiation detectors to monitor and quantify the fission gas releases that are important indicators of fuel performance. Details of the design and operation of this detection system and the preliminary results of the fuel performance measurements are presented in this paper. C1 [Scates, D. M.; Hartwell, J. K.; Drigert, M. W.; Walter, J. B.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Scates, DM (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA. EM dawn.scates@inl.gov; john.hartwell@inl.gov; mark.drigert@inl.gov; john.walter@inl.gov NR 7 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 784 EP 789 DI 10.1109/NSSMIC.2007.4436445 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400167 ER PT S AU Mitra, S Wielopolski, L AF Mitra, S. Wielopolski, L. GP IEEE TI Monitoring neutron generator output in a mixed neutron-gamma field using a plastic scintillator SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SCATTERING; SPECTRA AB Quantitative neutron-induced gamma-ray spectroscopy employing neutron generators (NGs) entails monitoring them for possible fluctuations in their neutron output. We accomplished this using a plastic scintillator and recording a spectrum from which we selected a neutron regionof-interest (nROI) to discriminate between neutrons and the accompanying high-energy gamma-rays. We show that the selected nROI is insensitive to changes in the gamma-ray background, thus allowing satisfactory normalization of the gamma-ray spectra of an in-situ system for analyzing soil carbon. C1 [Mitra, S.; Wielopolski, L.] Brookhaven Natl Lab, Dept Environm Sci, Environm Res & Technol Div, Upton, NY 11973 USA. RP Mitra, S (reprint author), Brookhaven Natl Lab, Dept Environm Sci, Environm Res & Technol Div, Upton, NY 11973 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 805 EP 807 DI 10.1109/NSSMIC.2007.4436450 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400172 ER PT S AU Dong, H Cuevas, C Curry, D Jastrzembski, E Barbosa, F Wilson, J Taylor, M Raydo, B AF Dong, H. Cuevas, C. Curry, D. Jastrzembski, E. Barbosa, F. Wilson, J. Taylor, M. Raydo, B. GP IEEE TI Integrated tests of a high speed VXS Switch Card and 250 MSPS Flash ADCs SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB High trigger rate nuclear physics experiments proposed for the 12 GeV upgrade at the Thomas Jefferson National Accelerator Facility create a need for new high speed digital systems for energy summing. Signals from electronic detectors will be captured with the Jefferson Lab FADC module, which collects and processes data from 16 charged particle sensors with 10 or 12 bit resolution at 250MHz sample rate. Up to sixteen FADC modules transfer energy information to a central energy summing module for each readout crate. The sums from the crates are combined to form a global energy sum that is used to trigger data readout for all modules. The Energy Sum module and FADC modules have been designed using the VITA-41 VME64 switched serial (VXS) standard. The VITA-41 standard defines payload and switch slot module functions, and offers an elegant engineered solution for Multi-Gigabit serial transmission on a standard VITA-41 backplane. The Jefferson Lab Energy Sum module receives data serially at a rate of up to 6 Giga-bits per second from the FADC modules. Both FADC and Energy Sum modules have been designed and assembled and this paper describes the integrated tests using both high speed modules in unison. C1 [Dong, H.; Cuevas, C.; Jastrzembski, E.; Barbosa, F.; Wilson, J.; Taylor, M.; Raydo, B.] Jefferson Lab, Newport News, VA 23606 USA. [Curry, D.] Harris Corp, Melbourne, VA 23320 USA. RP Dong, H (reprint author), Jefferson Lab, Newport News, VA 23606 USA. EM hdong@jlab.org; cuevas@jlab.org; dcurry04@harris.com; Jastrzembski@jlab.org; barbosa@jlab.org; Wilson@jlab.org; taylorw@jlab.org; braydo@jlab.org FU Jefferson Science Associates; LLC under U.S. DOE [DE-AC05-06OR23177] FX Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177 NR 0 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 831 EP 833 DI 10.1109/NSSMIC.2007.4436457 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400179 ER PT S AU Amerio, S Casarsa, M Cortiana, G Ferrazza, C Lucchesi, D Ristori, L Sartori, L Totaro, P Zanetti, AM AF Amerio, S. Casarsa, M. Cortiana, G. Ferrazza, C. Lucchesi, D. Ristori, L. Sartori, L. Totaro, P. Zanetti, A. M. GP IEEE TI A high quality trigger selection for the HW discovery channel at CDF SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE Tevatron; CDF; trigger; Higgs boson AB We exploited the enhanced capabilities of the upgraded CDF trigger system to design a new online selection for a light Standard Model Higgs boson produced in association with a W weak boson. The new trigger relies entirely on calorimetric requirements to detect the large missing energy from the W leptonic decay and two jets coming from the Higgs decay to a b (b) over bar quark pair. The result is a very inclusive trigger, complementary to the standard HW selections, based on high-momentum lepton signatures, which combines high efficiency for the signal with reasonable trigger rates up to the highest expected luminosities of Tevatron Run II. C1 [Amerio, S.; Cortiana, G.; Lucchesi, D.] Univ Padua, INFN Padua, Padua, Italy. [Casarsa, M.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Ferrazza, C.; Ristori, L.; Sartori, L.] Univ Pisa, INFN, I-56100 Pisa, Italy. [Totaro, P.; Zanetti, A. M.] Univ Trieste, INFN, I-34127 Trieste, Italy. RP Amerio, S (reprint author), Univ Padua, INFN Padua, Padua, Italy. RI Zanetti, Anna/I-3893-2012; OI Casarsa, Massimo/0000-0002-1353-8964 NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 834 EP 838 DI 10.1109/NSSMIC.2007.4436458 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400180 ER PT S AU Hoover, AS Bacrania, MK Dry, D Hastings, EP Lamont, SP Rim, JH Rabin, MW Rudy, CR Vo, DT Beall, JA Doriese, WB Hilton, GC Horansky, RD Irwin, KD Ullom, JN Vale, LR Kilbourne, CA King, J Porter, FS AF Hoover, A. S. Bacrania, M. K. Dry, D. Hastings, E. P. Lamont, S. P. Rim, J. H. Rabin, M. W. Rudy, C. R. Vo, D. T. Beall, J. A. Doriese, W. B. Hilton, G. C. Horansky, R. D. Irwin, K. D. Ullom, J. N. Vale, L. R. Kilbourne, C. A. King, J. Porter, F. S. GP IEEE TI Simulating the response of ultra-high energy resolution X- and gamma-ray microcalorimeter detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Microcalorimeter detectors based on transition-edge sensors coupled to a bulk absorber are an emerging technology for hard X-ray and soft gamma-ray measurements. Monte Carlo simulations codes, like GEANT4, can be a valuable tool for evaluating detector design ideas, interpreting measured data, and predicting detector performance. We report on initial attempts to reproduce measured microcalorimeter data with GEANT4 simulations. C1 [Hoover, A. S.; Bacrania, M. K.; Dry, D.; Hastings, E. P.; Lamont, S. P.; Rim, J. H.; Rabin, M. W.; Rudy, C. R.; Vo, D. T.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. [Doriese, W. B.; Hilton, G. C.; Horansky, R. D.; Irwin, K. D.; Ullom, J. N.; Vale, L. R.] Natl Inst Stand & Technol, Boulder, CO 80303 USA. [Kilbourne, C. A.; King, J.; Porter, F. S.] NASA, Greenbelt, MD 20771 USA. RP Hoover, AS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Porter, Frederick/D-3501-2012; Rim, Jung/J-5150-2015 OI Porter, Frederick/0000-0002-6374-1119; Rim, Jung/0000-0002-9081-0917 NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 847 EP 849 DI 10.1109/NSSMIC.2007.4436461 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400183 ER PT S AU Wolin, E Abbott, D Gurjyan, V Heyes, G Jastrzembski, E Lawrence, D Timmer, C AF Wolin, Elliott Abbott, D. Gurjyan, V. Heyes, G. Jastrzembski, E. Lawrence, D. Timmer, C. GP IEEE TI cMsg - A publish/subscribe interprocess communication package and framework SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Asynchronous publish/subscribe messaging is a simple but powerful interprocess communication technique that is widely used in industry. It is less widely used in the academic/research world, partly because commercial implementations are fairly expensive. cMsg is both a full-featured publish/subscribe package and a framework within which one can deploy multiply underlying communication packages. The underlying packages need not implement asynchronous publish/subscribe messaging. This framework feature allows one to unify all communications under a single, flexible API, and allows for integration of legacy communication packages. Performance is excellent, making cMsg suitable for use in controls applications as well as in high-speed data transfer applications. cMsg will be used extensively by the next generation of experiments at JLab. C1 [Wolin, Elliott; Abbott, D.; Gurjyan, V.; Heyes, G.; Jastrzembski, E.; Lawrence, D.; Timmer, C.] Jefferson Lab, Data Acquisit Grp, Newport News, VA 23606 USA. RP Wolin, E (reprint author), Jefferson Lab, Data Acquisit Grp, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 850 EP 855 DI 10.1109/NSSMIC.2007.4436462 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400184 ER PT S AU Wolin, E Abbott, D GurJyan, V Heyes, G Jastrzembski, E Lawrence, D Timmer, C AF Wolin, Elliott Abbott, D. GurJyan, V. Heyes, G. Jastrzembski, E. Lawrence, D. Timmer, C. GP IEEE TI EVIO - A lightweight object-oriented I/O package SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The EVIO package implements I/O between disk and an in-memory hierarchical object tree. Tree nodes are either container nodes, holding other nodes, or leaf nodes, containing any amount of data of a single type (int64_t, ... , int8_t, float, double, and string). Trees can easily be constructed using factory methods and stream operators; queried using STL-like algorithms, function object, etc; or modified using tree or node methods. The tree logically maps to XML, and utilities exist to transform between binary and ASCH XML formats. The binary representation is compact, I/O is simple and efficient, and endian conversions are handled automatically. EVIO will be used by the next generation of experiments at Jefferson Lab. C1 [Wolin, Elliott; Abbott, D.; GurJyan, V.; Heyes, G.; Jastrzembski, E.; Lawrence, D.; Timmer, C.] Jefferson Lab, Data Acquisit Grp, Newport News, VA 23606 USA. RP Wolin, E (reprint author), Jefferson Lab, Data Acquisit Grp, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 856 EP 859 DI 10.1109/NSSMIC.2007.4436463 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400185 ER PT S AU Wolin, E Abbott, D Yan, VG Heyes, G Jastrzembski, E Lawrence, D Timmer, C AF Wolin, Elliott Abbott, D. Yan, V. Gu Heyes, G. Jastrzembski, E. Lawrence, D. Timmer, C. GP IEEE TI The ET system - High speed Event Transfer and distribution via shared memory and networks SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Event Transfer (ET) system manages and distributes high volume data as it is being produced in real time. After data creation and insertion into the system, other processes can retrieve the data based on selection criteria, possibly modify the data, then return the data to the system. A chain of processes can thus process the data sequentially. The ET system has fast, local operation based on shared memory and POSIX threads and mutexes. Event transfer may also occur transparently over the network to remote users. The ET system has been in use for several years and is easy to use as well as extremely robust. It is implemented in C on Solaris and Linux platforms with a client library for vxWorks and has been ported to Java (the Java version does not use shared memory). C1 [Wolin, Elliott; Abbott, D.; Yan, V. Gu; Heyes, G.; Jastrzembski, E.; Lawrence, D.; Timmer, C.] Jefferson Lab, Data Acquisit Grp, Newport News, VA 23606 USA. RP Wolin, E (reprint author), Jefferson Lab, Data Acquisit Grp, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 860 EP 863 DI 10.1109/NSSMIC.2007.4436464 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400186 ER PT S AU Kotov, IV Fisyak, YV Lauret, J Van Buren, G Perevoztchikov, V Margetis, S Bouchet, J de Souza, RD AF Kotov, Ivan V. Fisyak, Yuri V. Lauret, Jerome Van Buren, Gene Perevoztchikov, Victor Margetis, Spyridon Bouchet, Jonathan de Souza, Rafael Derrardi GP IEEE TI Silicon Vertex Tracker drift velocity calibration and alignment SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID STAR; DETECTOR AB The STAR experiment at RHIC uses high resolution Silicon Vertex Tracker and Silicon Strip Detector for track reconstruction in concert with Time Projection Chamber. The considerable benefits of using high resolution detectors in track reconstruction could be fully utilized only after accurate calibration and alignment. SVT sensors are silicon drift detectors. To obtain good resolution in drift direction the drift time to drift coordinate relationship is needed. The calibration procedure for drift detectors and alignment strategy are discussed and results are presented. C1 [Kotov, Ivan V.] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. [Fisyak, Yuri V.; Lauret, Jerome; Van Buren, Gene; Perevoztchikov, Victor] Brookhaven Natl Lab, Upton, NY 11973 USA. [Margetis, Spyridon] Kent State Univ, Kent, OH 44242 USA. [Bouchet, Jonathan] Subatech, Nantes, France. [de Souza, Rafael Derrardi] Univ Estadual Campinas, BR-13081970 Campinas, SP, Brazil. RP Kotov, IV (reprint author), Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. EM kotov@bnl.gov RI Derradi de Souza, Rafael/M-4791-2013 OI Derradi de Souza, Rafael/0000-0002-2084-7001 NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 866 EP 870 DI 10.1109/NSSMIC.2007.4436466 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400188 ER PT S AU Cui, Y Bolotnikov, A Camarda, G Hossain, A James, RB De Geronimo, G Fried, J O'Connor, P Kargar, A Harrison, MJ McGregor, DS AF Cui, Y. Bolotnikov, A. Camarda, G. Hossain, A. James, R. B. De Geronimo, G. Fried, J. O'Connor, P. Kargar, A. Harrison, M. J. McGregor, D. S. GP IEEE TI Hand-held gamma-ray spectrometer based on high-efficiency Frisch-ring CdZnTe detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE CdZnTe; Frisch-ring detector; gamma-ray spectrometer ID SEMICONDUCTOR RADIATION DETECTOR; PERFORMANCE AB Frisch-ring CdZnTe detectors have demonstrated both good energy resolution, <1% FWHM at 662 keV, and good efficiency in detecting gamma rays, highlighting the strong potential of CdZnTe materials for such applications. We are designing a hand-held gamma-ray spectrometer based on Frisch-ring detectors at Brookhaven National Laboratory. It employs an 8x8 CdZnTe detector array to achieve a high volume of 19.2 cm 3, so that the detection efficiency is greatly improved. By using the front-end application specific integrated circuits (ASICs) developed at BNL, this spectrometer has a small profile and high energy resolution. The spectrometer includes a signal processing circuit, digitization and storage circuits, a high-voltage module, and a universal serial bus (USB) interface. In this paper, we introduce the details of the system structure and report our test results with it. C1 [Cui, Y.; Bolotnikov, A.; Camarda, G.; James, R. B.; De Geronimo, G.; O'Connor, P.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Kargar, A.; Harrison, M. J.; McGregor, D. S.] Kansas State Univ, Manhattan, KS 66506 USA. RP Cui, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM ycui@bnl.gov; mcgregor@ksu.edu FU Brookhaven Science Associates; LLC [DE-AC0298CH1886]; U.S. Department of Energy; Office of Nonproliferation Research and Development [NA22] FX This work was supported by Brookhaven Science Associates, LLC under Contract DE-AC0298CH1886 with the U.S. Department of Energy, Office of Nonproliferation Research and Development (NA22). NR 13 TC 2 Z9 2 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 945 EP 948 DI 10.1109/NSSMIC.2007.4437174 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400204 ER PT S AU Ziock, KP Fabris, L Carr, D Collins, J Cunningham, M Habte, F Karnowski, T Marchant, W AF Ziock, K. P. Fabris, L. Carr, D. Collins, J. Cunningham, M. Habte, F. Karnowski, T. Marchant, W. GP IEEE TI A fieldable-prototype, large-area, gamma-ray imager for orphan source search SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE coded aperture imager; gamma-ray detectors; gamma-ray imagers; orphan source search; nuclear imaging ID CODED-APERTURE; DETECTOR AB We have constructed a unique instrument for use in the search for orphan sources. The system uses gamma-ray imaging to "see through" the natural background variations that effectively limit the search range of current devices to similar to 10 m. The imager is mounted in a 4.9-m-long trailer and can be towed by a large personal vehicle. Source locations are determined both in range and along the direction of travel as the vehicle moves. A fully inertial platform coupled to a global positioning system receiver is used to map the gamma-ray images onto overhead geospatial imagery. The resulting images provide precise source locations, allowing rapid follow-up work. The instrument simultaneously searches both sides of the street to a distance of 50 m (100-m swath) for milliCurie-class sources with near-perfect performance. C1 [Ziock, K. P.; Fabris, L.; Cunningham, M.; Karnowski, T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Carr, D.; Collins, J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Habte, F.] Stanford Univ, Stanford, CA 94305 USA. [Marchant, W.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. RP Ziock, KP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM ziockk@ornl.gov RI Fabris, Lorenzo/E-4653-2013 OI Fabris, Lorenzo/0000-0001-5605-5615 FU Department of Homeland Security; Domestic Nuclear Detection Office; U.S. Department of Energy [DE-AC05-00OR22725]; University of California; Lawrence Livermore National Laboratory [W-7405-Eng-48] FX This work was supported by the Department of Homeland Security and Domestic Nuclear Detection Office. Portions of the work were conducted by the Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. Portions of this work were conducted under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory, under Contract W-7405-Eng-48. NR 12 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 949 EP 958 DI 10.1109/NSSMIC.2007.4437175 PG 10 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400205 ER PT S AU Xie, QG Wagner, RG Drake, G DeLurgio, P Dong, Y Chen, CT Kao, CM AF Xie, Qingguo Wagner, Robert G. Drake, Gary DeLurgio, Patrick Dong, Yun Chen, Chin-Tu Kao, Chien-Min GP IEEE TI Performance evaluation of multi-pixel photon counters for PET imaging SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE positron emission tomography (PET); scintillation pulse; silicon photomultiplier (SiPM); multi-pixel photon counter (MPPC) ID SILICON PHOTOMULTIPLIER; DETECTOR; READOUT; SIPM AB The multi-pixel photon counter (MPPC), also known as the silicon photo-multiplier (SiPM), is a novel, solid-state photodetector that contains an array of Geiger-mode photodiodes (called microcells below) to a gain in range of 10(5)-10(6) when operating at a low voltage of 40-70V. The device also has relatively high photon detection efficiency (PDE) and fast timing response. It is also compact and insensitive to magnetic fields. These properties of the MPPC has recently created substantial interest in using the device for PET imaging. In this paper, we evaluate and compare the performance properties of three designs of 1 X 1mm(2) MPPC offered by Hamamatsu for use in PET. We examine the gains of devices, and also their energy and timing resolutions when coupled to LYSO. C1 [Xie, Qingguo] Univ Chicago, Dept Radiol, Chicago, IL 60637 USA. [Xie, Qingguo] Huazhong Univ Sci & Technol, Dept Biomed Engn, Wuhan, Peoples R China. [Wagner, Robert G.; Drake, Gary; DeLurgio, Patrick] Argonne Natl Lab, High Energy Phys Div, Argonne, IL USA. [Dong, Yun] IIT, Dept Biomed Engn, Chicago, IL USA. [Chen, Chin-Tu; Kao, Chien-Min] Univ Chicago, Dept Radiol, Chicago, IL USA. RP Xie, QG (reprint author), Univ Chicago, Dept Radiol, Chicago, IL 60637 USA. EM qgxie@ieee.org FU UChicago Argonne internal [LDRD #2006-075-NO]; Argonne Laboratory Directed Research and Development [2007-145-NO]; ACS-IRG [6-9512]; Ministry of Science and Technology (China) [2006AA02Z333]; Ministry of Education (China) [107073]; Wuhan National Laboratory [200707]; Office of Science of the Department of Energy FX This work is in part supported by the UChicago Argonne internal grant, LDRD #2006-075-NO, Argonne Laboratory Directed Research and Development grant #2007-145-NO, and the ACS-IRG grant #6-9512, the Ministry of Science and Technology (China) grant #2006AA02Z333, the Ministry of Education (China) grant #107073, and Wuhan National Laboratory for Optoelectronics internal grant 200707. The Argonne Laboratory is supported by the Office of Science of the Department of Energy. NR 10 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 969 EP 974 DI 10.1109/NSSMIC.2007.4437178 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400208 ER PT S AU Schumer, JW Commisso, J Hinshelwood, DD Mosher, D Murphy, DP Ottinger, PF Phipps, DG Stephanakis, SJ Weber, BV Young, FC Cooperstein, G Blackburn, BW Jones, JL Johnson, J Valles, NO AF Schumer, J. W. Commisso, J. Hinshelwood, D. D. Mosher, D. Murphy, D. P. Ottinger, P. F. Phipps, D. G. Stephanakis, S. J. Weber, B. V. Young, F. C. Cooperstein, G. Blackburn, B. W. Jones, J. L. Johnson, J. Valles, N. O. GP IEEE TI Development of an intense pulsed characteristic gamma-ray source for active interrogation of special nuclear material SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID ION-BEAMS AB An intense source of characteristic gamma-rays is developed as a potential probe to identify special nuclear material. A pinch-reflex ion diode is operated on the Gamble II pulsed power generator to produce proton beams with 270-kA peak current and 2.0-MV peak voltage. These beams bombard a PTFE (Teflon) target to produce characteristic gamma-rays by the F-19(p,alpha gamma)O-16 reaction with energies of 6.13, 6.92, and 7.12 MeV and with an intensity of 3.1x10(11) gamma-rays into 4 pi in a single 50-ns duration pulse. Simple ballistic transport is used to transport the proton beam one meter so that the gamma-ray signal is separated in time and space from the diode bremsstrahlung pulse. C1 [Schumer, J. W.; Commisso, J.; Hinshelwood, D. D.; Murphy, D. P.; Ottinger, P. F.; Weber, B. V.; Cooperstein, G.] USN, Res Lab, Washington, DC 20375 USA. [Mosher, D.; Phipps, D. G.; Stephanakis, S. J.; Young, F. C.] L 3 Commun, Titan Grp, Reston, VA 20190 USA. [Blackburn, B. W.; Jones, J. L.; Johnson, J.; Valles, N. O.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Schumer, JW (reprint author), USN, Res Lab, Washington, DC 20375 USA. EM joseph.schumer@nri.navy.mil RI Johnson, James/B-9689-2017 OI Johnson, James/0000-0002-3434-4413 FU INFN; University of Padova FX This work was supported by INFN and University of Padova. NR 12 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1026 EP 1032 DI 10.1109/NSSMIC.2007.4437187 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400217 ER PT S AU Arai, Y Ikegami, Y Unno, Y Tsuboyama, T Terada, S Hazumi, M Kohriki, T Ikeda, H Hara, K Miyake, H Ishino, H Varner, G Martin, E Tajima, H Ohno, M Fukuda, K Komatsubara, H Ida, J Hayashi, H Kawai, Y AF Arai, Y. Ikegami, Y. Unno, Y. Tsuboyama, T. Terada, S. Hazumi, M. Kohriki, T. Ikeda, H. Hara, K. Miyake, H. Ishino, H. Varner, G. Martin, E. Tajima, H. Ohno, M. Fukuda, K. Komatsubara, H. Ida, J. Hayashi, H. Kawai, Y. GP IEEE TI SOI pixel developments in a 0.15 mu m technology SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID DEVICES AB While the SOI (Silicon-On-Insulator) device concept is very old, commercialization of the technology is relatively new and growing rapidly in high-speed processor and low-power applications. Furthermore, features such as latch-up immunity, radiation hardness and high-temperature operation are very attractive in high energy and space applications. Once high-quality bonded SOI wafers became available in the late 90s, it opened up the possibility to get two different kinds of Si on a single wafer. This makes it possible to realize an ideal pixel detector; pairing a fully-depleted radiation sensor with CMOS circuitry in an industrial technology. In 2005 we started Si pixel R&D with OKI Electric Ind. Co., Ltd. which is the first market supplier of Fully-Depleted SOI products. We have developed processes for p+/n+ implants to the substrate and for making connections between the implants and circuits in the OKI 0.15mm FD-SOI CMOS process. We have preformed two Multi Project Wafer (MPW) runs using this SOI process. We hosted the second NOW run and invited foreign universities and laboratories to join this MPW run in addition to Japanese universities and laboratories. Features of these SOI devices and experiences with SOI pixel development are presented. C1 [Arai, Y.] Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan. [Ikegami, Y.; Unno, Y.; Tsuboyama, T.; Terada, S.; Hazumi, M.; Kohriki, T.] KEK, Tsukuba, Ibaraki, Japan. [Ikeda, H.] JAXA, ISAS, Sagamihara, Kanagawa, Japan. [Hara, K.; Miyake, H.] Univ Tsukuba, Inst Pure & Appl Sci, Tsukuba, Ibaraki, Japan. [Ishino, H.] Tokya Inst Tech, Dept Phys, Tokyo, Japan. [Varner, G.; Martin, E.] Univ Hawaii, Dept Phys & Astron, Hawaii, HI USA. [Tajima, H.] SLAC, Stanford, CA USA. [Ohno, M.; Fukuda, K.; Komatsubara, H.; Ida, J.; Hayashi, H.; Kawai, Y.] Oki Elect Ind Co Ltd, Hachioji, Tokyo, Japan. RP Arai, Y (reprint author), Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan. EM yasuo.arai@kek.jp FU KAKENHI [18204027] FX This work was supported in part by KAKENHI (18204027). NR 18 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1040 EP 1046 DI 10.1109/NSSMIC.2007.4437189 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400219 ER PT S AU Nygren, DR AF Nygren, David R. GP IEEE TI The optimal detectors for WIMP and 0-neutrino double beta decay searches: Identical high pressure xenon gas TPC SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SCINTILLATION PROPORTIONAL COUNTER; DARK-MATTER; CHAMBER; XE-136 AB The search for weakly interacting massive particles (WIMP), a candidate for Dark Matter, involves the detection of nuclear recoils with energies of a few tens of keV and high rejection of electronic recoils. In contrast, the search for neutrino-less double beta decay, evidence for which would establish that neutrinos are their own antiparticles and that lepton number is violated, requires detailed event topology and extremely precise energy measurement, at the 2 - 3 MeV level. Despite these differences, a particular high-pressure xenon gas TPC appears to offer a common methodology, with no significant compromises in performance. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Nygren, DR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM drnygren@lbl.gov NR 29 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1051 EP 1055 DI 10.1109/NSSMIC.2007.4437191 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400221 ER PT S AU Kisner, RA Holcomb, DE Stephan, AC Jardret, V Britton, CL AF Kisner, Roger A. Holcomb, David E. Stephan, Andrew C. Jardret, Vincent Britton, Charles L., Jr. GP IEEE TI Development of a high-efficiency, glass shell-based, He-3-filled neutron detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have developed a new type of neutron sensor based on small, gas-filled, glass shells with external electrodes. The detector functions as a small (<1-cm-diameter) He-3 ion chamber for applied bias voltages from roughly 50 V to 900 V. We have demonstrated that the detectors function with internal gas pressures from 6 to 10 atm. Charge transport times across the detector volume are a few microseconds. The detectors have very low gamma-ray sensitivity due to their small size as compared to the path-length of energetic electrons generated by gamma-ray interactions. Multiple shell detectors are intended to be deployed within a moderator block to form a single detector system. The resulting detector-moderator configuration approaches the efficiency of a homogeneous system. This paper presents device characterizations and performance data. C1 [Kisner, Roger A.; Holcomb, David E.; Britton, Charles L., Jr.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Stephan, Andrew C.; Jardret, Vincent] Mat Innovat, Knoxville, TN 37931 USA. RP Kisner, RA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM kisnerra@oml.gov; holcombde@ornl.gov; andrew.stephan@materialinnovations.com; vincent.jardret@materialinnovations.com; brittoncl@ornl.gov NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1056 EP 1061 DI 10.1109/NSSMIC.2007.4437192 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400222 ER PT S AU Kiff, SD He, Z AF Kiff, Scott D. He, Zhong GP IEEE TI The impact of multiple-site interactions on the energy resolution of a high-pressure xenon gamma-ray spectrometer SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID IONIZATION CHAMBERS; DETECTORS; XE AB High-pressure xenon (HPXe) ionization chambers have generated interest as a radiation detection medium for purposes requiring good energy resolution, high detection efficiency, and uniform response over a broad temperature range, such as homeland security and well logging applications. However, these chambers generally exhibit a substantial degradation of the measured energy resolution relative to theoretical limits. This investigation studies the impact of the number of interaction sites in an event sequence on the measured energy resolution using a benchmarked simulation package. The prominence of single and multiple-site interactions is investigated in addition to the photopeak broadening due to each event class. A radial position-sensing technique developed for coplanar-anode HPXe chambers is shown to have benefit for only single-site events. C1 [Kiff, Scott D.] Pacific NW Natl Lab, Richland, WA 99352 USA. [He, Zhong] Univ Michigan, Ann Arbor, MI 48109 USA. RP Kiff, SD (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM scott.kiff@pnl.gov; hezhong@umich.edu FU National Science Foundation Graduate Research Fellowship; U.S. Department of Energy under NEER [DE-FG07-02ID14332, NA-22, DE-FG07-06ID147] FX .This work is supported under a National Science Foundation Graduate Research Fellowship and by the U.S. Department of Energy under NEER Grant DE-FG07-02ID14332 and NA-22 Award DE-FG07-06ID147 NR 22 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1062 EP 1068 DI 10.1109/NSSMIC.2007.4437193 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400223 ER PT S AU Karcher, A Abiad, R Bebek, CJ Chao, GY Gnani, D Krieger, B von der Lippe, H Reith, J Walder, JP AF Karcher, A. Abiad, R. Bebek, C. J. Chao, G. Y. Gnani, D. Krieger, B. von der Lippe, H. Reith, J. Walder, J. -P. GP IEEE TI A low noise, radiation tolerant CCD Readout processor for the proposed SNAP satellite SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB To simplify the system integration, thermal design and wiring of the SNAP satellite focal plane a custom IC has been developed that can digitize the four output channels of a CCD. This CCD Readout IC is designed to operate at room temperature for test purposes and at 140K the operating temperature of the focal plane. The chip consists of four-channels of pre-amplifier, double correlated sampler and 14-bit pipeline AD converter. The chip incorporates an innovative circuitry that selects one of three gain levels on a per-pixel basis to achieve greater than 16-bit dynamic range. It has an on-chip voltage reference and programmable configuration registers. We have tested the performance both at room temperature and at 140K, as well as the radiation tolerance. The ASIC, implemented in a standard 0.25 mu m CMOS technology, has a measured readout noise of 6.2 mu V rms at 100kHz readout speed, a measured non-linearity of +/-5 LSB and a power consumption of 121mW. C1 [Karcher, A.; Abiad, R.; Bebek, C. J.; Chao, G. Y.; Gnani, D.; Krieger, B.; von der Lippe, H.; Reith, J.; Walder, J. -P.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Karcher, A (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Gnani, Dario/J-6426-2012 OI Gnani, Dario/0000-0003-0464-9176 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1069 EP 1072 DI 10.1109/NSSMIC.2007.4437194 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400224 ER PT S AU Rivera, R AF Rivera, Ryan CA SNAP Collaboration GP IEEE TI Distributed data acquisition and storage architecture for the SuperNova Acceleration Probe SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE data acquisition; data compression; distributed memories; space vehicle electronics AB The SuperNova Acceleration Probe (SNAP) instrument is being designed to collect image and spectroscopic data for the study of dark energy in the universe. This paper describes a distributed architecture for the data acquisition system which interfaces to visible light and infrared imaging detectors. The architecture includes the use of NAND flash memory for the storage of exposures in a file system. Also described is an FPGA-based lossless data compression algorithm with a configurable pre-scaler based on a novel square root data compression method to improve compression performance. The required interactions of the distributed elements with an instrument control unit will be described as well. C1 [Rivera, Ryan] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Rivera, R (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1087 EP 1093 DI 10.1109/NSSMIC.2007.4437198 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400228 ER PT S AU Sfiligoi, I AF Sfiligoi, Igor GP IEEE TI Making science in the Grid world: Using glideins to maximize scientific output SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The current Grid computing model is based on a set of independent computing clusters, with only a thin common software layer among them and Grid users are expected to adapt. However, scientists are supposed to do science and time spent on computing problems is subtracting time available for scientific thinking. In this paper we present the glidein approach that aims to make the Grid computing as easy as working in a local batch environment. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Sfiligoi, I (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 5 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1107 EP 1109 DI 10.1109/NSSMIC.2007.4437201 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400231 ER PT S AU Kouzes, RT Siciliano, ER Ely, JH Keller, PE McConn, RJ AF Kouzes, Richard T. Siciliano, Edward R. Ely, James H. Keller, Paul E. McConn, Ronald J. GP IEEE TI Passive neutron detection at borders SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Radiation portal monitor systems have been deployed to screen for illicit trafficking of radioactive materials at international border crossings. This report reviews some of the neutron detection requirements and capabilities of passive detection systems used for such applications. Simulations show the effects of cargo materials on neutron spectra, different detector geometries, using a large-array of neutron detectors, and the effects of backgrounds including "ship effect" neutrons. C1 [Kouzes, Richard T.; Siciliano, Edward R.; Ely, James H.; Keller, Paul E.; McConn, Ronald J.] PNNL, Richland, WA 99352 USA. RP Kouzes, RT (reprint author), PNNL, Richland, WA 99352 USA. NR 10 TC 3 Z9 3 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1115 EP 1119 DI 10.1109/NSSMIC.2007.4437203 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400233 ER PT S AU Aryaeinejad, R Spencer, DF AF Aryaeinejad, Rahmat Spencer, David F. GP IEEE TI Network-oriented radiation monitoring system (NORMS) SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have developed a multi-functional pocket radiation monitoring system capable of detecting and storing gamma ray and neutron data and then sending the data through a wireless connection to a remote central facility upon request. The device has programmable alarm trigger levels that can be modified for specific applications. The device could be used as a stand-alone device or in conjunction with an array to cover a small or large area. The data is stored with a date/time stamp. The device may be remotely configured. Data can be transferred and viewed on a PDA via direct connection or wirelessly. Functional/bench tests have been completed successfully. The device detects low-level neutron and gamma sources within a shielded container in a radiation field of 10 uR/hr above the ambient background level. C1 [Aryaeinejad, Rahmat; Spencer, David F.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Aryaeinejad, R (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 4 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1120 EP 1124 DI 10.1109/NSSMIC.2007.4437204 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400234 ER PT S AU Gwon, CS Novikova, EI Phlips, BF Strickman, MS Fewtrell, ZG Deng, S Johns, RC Waters, LS AF Gwon, Chul S. Novikova, Elena I. Phlips, Bernard F. Strickman, Mark S. Fewtrell, Zachary G. Deng, Sam Johns, Russell C. Waters, Laurie S. GP IEEE TI Interacting with the SWORD package (SoftWare for the Optimization of Radiation Detectors) SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We present the first version of SoftWare for the Optimization of Radiation Detectors (SWORD): a software package designed to simplify the evaluation of different gamma-ray detector configurations or the process of conducting system architecture studies for Homeland Security and other applications. It is a fully integrated system that uses GEANT4 [2] and MCNPX [3] to conduct Monte Carlo simulations, and can analyze the resulting output in a single step. We discuss in detail the following: the SWORD 3-D graphical tool for interactively creating custom detector and environment designs; the integration of the MCNPX interface, where users can provide an MCNPX input deck and directly push it into the system; and finally the serialization of data into a binary format in order to better manage C1 [Gwon, Chul S.; Novikova, Elena I.; Phlips, Bernard F.; Strickman, Mark S.] USN, Res Lab, Washington, DC 20375 USA. [Johns, Russell C.; Waters, Laurie S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gwon, CS (reprint author), USN, Res Lab, Washington, DC 20375 USA. EM chul.gwon@nrl.navy.mil; novikova@nrl.navy.mil; phlips@nrl.navy.mil; strickman@nrl.navy.mil; zachary.fewtrell@nrl.navy.mil; sam.deng@nrl.navy.mil; johns@lanl.gov; lsw@lanl.gov FU Domestic Nuclear Detection Office of the U.S FX . This work was supported by the Domestic Nuclear Detection Office of the U.S. Department of Homeland Security NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1130 EP 1133 DI 10.1109/NSSMIC.2007.4437206 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400236 ER PT S AU Hiller, L Gosnell, T Gronberg, J Wright, D AF Hiller, Larry Gosnell, Tom Gronberg, Jeff Wright, Douglas GP IEEE TI Calculating gamma-ray signatures from aged mixtures of heavy nuclides SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID EQUATIONS AB We have created and distributed an open-source software package, RadSrc, that calculates the intrinsic gamma-ray spectrum from the nuclear decay of a mixture of radioisotopes. It implements the Bateman solution of the standard equations of radioactive-series growth and decay to determine isotope concentrations at a user selectable age and processes a database of decay energy lines to generate gamma-ray intensities from all decay chains. We provide an interactive program for studying complete spectra, a function library (callable from C, C++, and Fortran), and interfaces to popular Monte Carlo transport codes (MCNP, MCNPX, COG, and Geant4) so that the gamma rays can be sampled and tracked directly by the parent code. The RadSrc Suite can be downloaded from http://nuclear.llnl.gov/simulation. C1 [Hiller, Larry; Gosnell, Tom; Gronberg, Jeff; Wright, Douglas] Lawrence Livermore Natl Lab, Livermore, CA 94500 USA. RP Hiller, L (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94500 USA. NR 8 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1138 EP 1142 DI 10.1109/NSSMIC.2007.4437208 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400238 ER PT S AU Hagmann, C Lange, D Wright, D AF Hagmann, Chris Lange, David Wright, Douglas GP IEEE TI Cosmic-ray shower generator (CRY) for Monte Carlo transport codes SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SEA-LEVEL; SPECTRUM; GEV/C AB The CRY software library generates correlated cosmic-ray particle shower distributions at one of three elevations (sea level, 2100 m, and 11300 m) for use as input to transport and detector simulation codes. Our simulation is based on precomputed input tables derived from full MCNPX simulations of primary cosmic rays on the atmosphere and benchmarked against published cosmic-ray measurements. Our simulation provides all particle production (muons, neutrons, protons, electrons, photons, and pions) with the proper flux within a user-specified area and altitude. The code generates individual showers of secondary particles sampling the energy, time of arrival, zenith angle, and multiplicity with basic correlations, and has user controls for latitude (geomagnetic cutoff) and solar cycle effects. We provide a function library, callable from C, C++, and Fortran, and interfaces to popular Monte Carlo transport codes (MCNP, MCNPX, COG, Geant4). The software library and examples can be downloaded from http://nuclear.llnl.gov/simulation. C1 [Hagmann, Chris; Lange, David; Wright, Douglas] Lawrence Livermore Natl Lab, Livermore, CA 94500 USA. RP Hagmann, C (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94500 USA. NR 6 TC 10 Z9 10 U1 1 U2 7 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1143 EP 1146 DI 10.1109/NSSMIC.2007.4437209 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400239 ER PT S AU Robinson, SM Ashbaker, ED Schweppe, JE Siciliano, ER AF Robinson, S. M. Ashbaker, E. D. Schweppe, J. E. Siciliano, E. R. GP IEEE TI Optimal background attenuation for fielded spectroscopic detection systems SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Radiation detectors are often placed in positions difficult to shield from the effects of terrestrial background gamma radiation. This is particularly true in the case of Radiation Portal Monitor (RPM) systems, as their wide viewing angle and outdoor installations make them susceptible to radiation from the surrounding area. Reducing this source of background can improve gross-count detection capabilities in the current generation of non-spectroscopic RPM's as well as source identification capabilities in the next generation of spectroscopic RPM's. To provide guidance for designing such systems, the problem of shielding a general spectroscopic-capable RPM system from terrestrial gamma radiation is considered. This analysis is carried out by template matching algorithms, to determine and isolate a set of non-threat isotopes typically present in the commerce stream. Various model detector and shielding scenarios are calculated using the Monte-Carlo N-Particle (MCNP) computer code. Amounts of nominal-density shielding needed to increase the probability of detection for an ensemble of illicit sources are given. Common shielding solutions such as steel plating are evaluated based on the probability of detection for 3 particular illicit sources of interest and the benefits are weighed against the incremental cost of shielding. Previous work has provided optimal shielding scenarios for RPMs based on gross-counting measurements, and those same solutions (shielding the internal detector cavity, direct shielding of the ground between the detectors, and the addition of collimators) are examined with respect to their utility to improving spectroscopic detection. C1 [Robinson, S. M.; Ashbaker, E. D.; Schweppe, J. E.; Siciliano, E. R.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Robinson, SM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1147 EP 1151 DI 10.1109/NSSMIC.2007.4437210 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400240 ER PT S AU Robinson, SM Kiff, SD Ashbaker, ED Bender, SE Flumerfelt, E Salvitti, M Borgardt, J Woodring, ML AF Robinson, S. M. Kiff, Scott D. Ashbaker, Eric D. Bender, Sarah E. Flumerfelt, Eric Salvitti, Matthew Borgardt, James Woodring, Mitchell L. GP IEEE TI Effects of high count rate and gain shift on isotope identification algorithms SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Spectroscopic gamma-ray detectors are used for many research applications as well as Homeland Security screening applications. Sodium Iodide (NaI) scintillator crystals coupled with photomultiplier tubes provide medium-resolution spectral data about the surrounding environment. NaI-based detectors, paired with spectral identification algorithms, are often effective in identifying sources of interest by isotope. However, intrinsic limitations exist for NaI systems because of gain shifts and spectral marring (e.g., loss of resolution and count-rate saturation) at high count rates. These effects are hardware dependent and have strong effects on the radioisotopic identification capability of these systems. In this work, the effects of high count rate on the response of isotope-identification algorithms are explored. It is shown that a small gain shift of a few tens of keV is sufficient to disturb identification. The onset of this and other spectral effects is estimated for NaI crystals, and a mechanism for mitigating these effects by estimating and correcting for them is implemented and evaluated. C1 [Robinson, S. M.; Kiff, Scott D.; Ashbaker, Eric D.; Bender, Sarah E.; Woodring, Mitchell L.] Pacific Northwestern Natl Lab, Richland, WA 99352 USA. [Flumerfelt, Eric; Salvitti, Matthew; Borgardt, James] Juniata Coll, Huntingdon, PA USA. RP Robinson, SM (reprint author), Pacific Northwestern Natl Lab, Richland, WA 99352 USA. NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1152 EP 1156 DI 10.1109/NSSMIC.2007.4437211 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400241 ER PT S AU Habte, F Cunningham, MF Fabris, L Ziock, KP AF Habte, Frezghi Cunningham, Mark F. Fabris, Lorenzo Ziock, Klaus P. GP IEEE TI Performance of a large-area, gamma imager using a point source injection technique SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We recently developed a fieldable large-area, coded-aperture, gamma imager (the Large Area Imager - LAI). The instrument was developed to detect weak radiation sources in a fluctuating natural background. Ideally, the efficacy of the instrument is determined using a receiver-operator statistics generated from measurement data in terms of probability of detection versus probability of false alarm. However, due to the impracticality of hiding many sources in public areas, it is difficult to measure the data required to generate receiver-operator characteristic (ROC) curves. Instead, we developed a high statistics "model source" from measurements of a real point source. The model source is then injected into data collected from the world at large where, presumably, no source exists. In this paper we have applied this "source injection" technique to evaluate the performance of the gamma imager. We injected the model source at many locations paraflel to the imager driving direction keeping the source to imager distance fixed. From this data, we generated probabilities of detection and false alarms and plotted ROC curves for 1, 1.25 and 1.5 mCi sources placed at 50-m from the imager. We also developed ROC curves for I mCi source injected at 35, 40, 45 and 50-m from the imager. The result shows that this prototype instrument provides excellent performance for a 1-mCi source injected at 50-m perpendicular distance from the imager in a single pass at an average velocity of 11 m/s. C1 [Habte, Frezghi; Cunningham, Mark F.; Fabris, Lorenzo; Ziock, Klaus P.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Habte, F (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Fabris, Lorenzo/E-4653-2013 OI Fabris, Lorenzo/0000-0001-5605-5615 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1157 EP 1161 DI 10.1109/NSSMIC.2007.4437212 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400242 ER PT S AU Ianakiev, KD Alexandrov, BS Blackburn, BW Hausladen, P Hunt, AW Johnson, JT Jones, JL McCluskey, CW Mihalczo, JT Moss, CE Williams, RB AF Ianakiev, K. D. Alexandrov, B. S. Blackburn, B. W. Hausladen, P. Hunt, A. W. Johnson, J. T. Jones, J. L. McCluskey, C. W. Mihalczo, J. T. Moss, C. E. Williams, R. B. GP IEEE TI Electronics and signal processing for prompt radiation detection SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Active interrogation with pulsed bremsstrahlung beams can saturate detectors and produce high count rates of overlapping pulses in the prompt region (< 1 mu s) after the interrogating pulse. We describe a method to eliminate saturation by modifying the photomultiplier voltage divider and by gating intermediate pairs of dynodes and the anode. To process the high count rate of overlapping pulses, we convert the output current pulses to charge-pulse steps that can be digitally processed more easily and rapidly in real time. We discuss the application to LaBr3, liquid, and plastic scintillators and present some preliminary data. C1 [Ianakiev, K. D.; Alexandrov, B. S.; McCluskey, C. W.; Moss, C. E.; Williams, R. B.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Blackburn, B. W.; Johnson, J. T.; Jones, J. L.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Hausladen, P.; Mihalczo, J. T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Hunt, A. W.] Idaho State Univ, Idaho Accelerator Ctr, Pocatello, ID 83209 USA. RP Ianakiev, KD (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM ianakiev@lanl.gov; boian@lanl.gov; Brandon.Blackburn@inl.gov; hausladenpa@ornl.gov; huntalan@athena.physics.isu.edu; james.johnson@inl.gov; James.Jones@inl.gov; craigm@lanl.gov; mihalczojt@ornl.gov; cmoss@lanl.gov; mouser@lanl.gov RI Alexandrov, Boian/D-2488-2010; Johnson, James/B-9689-2017 OI Alexandrov, Boian/0000-0001-8636-4603; Johnson, James/0000-0002-3434-4413 NR 4 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1166 EP 1169 DI 10.1109/NSSMIC.2007.4437214 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400244 ER PT S AU Seifert, A Hensley, WK Siciliano, ER Pitts, WK AF Seifert, Allen Hensley, Walter K. Siciliano, Edward R. Pitts, W. Karl GP IEEE TI Fast neutron sensitivity with HPGe SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB In addition to being excellent gamma-ray detectors, germanium detectors are also sensitive to fast neutrons. Incident neutrons undergo inelastic scattering {Ge(n,n')Ge*} off germanium nuclei and the resulting excited states emit gamma rays or conversion electrons. The response of a standard 140% high-purity germanium (HPGe) detector with a bismuth germanate (BGO) anti-coincidence shield was measured for several neutron sources to characterize the ability of the HPGe detector to detect fast neutrons. For a sensitivity calculation performed using the characteristic fast neutron response peak that occurs at 692 keV, the 140% germanium detector system exhibited a sensitivity of similar to 175 counts / kg of WGPu(metal) in 1000 seconds at a source-detector distance of 1 meter with 4 in. of lead shielding between source and detector. Theoretical work also indicates that it might be possible to use the shape of the fast-neutron inelastic scattering signatures (specifically, the end-point energy of the long high energy tail of the resulting asymmetric peak) to gain additional information about the energy distribution of the incident neutron spectrum. However, the experimentally observed end-point energies appear to be almost identical for each of the fast neutron sources counted. Detailed MCNP calculations show that the neutron energy distributions impingent on the detector for these sources are very similar in this experimental configuration, due to neutron scattering in a lead shield (placed between the neutron source and HPGe detector to reduce the gamma ray flux), the BGO anti-coincidence detector, and the concrete floor. C1 [Seifert, Allen; Hensley, Walter K.; Siciliano, Edward R.; Pitts, W. Karl] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Seifert, A (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 3 TC 1 Z9 1 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1175 EP 1180 DI 10.1109/NSSMIC.2007.4437216 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400246 ER PT S AU Sullivan, CJ Garner, SE Lombardi, M Butterfield, KB Smith-Nelson, MA AF Sullivan, C. J. Garner, S. E. Lombardi, M. Butterfield, K. B. Smith-Nelson, M. A. GP IEEE TI Evaluation of key detector parameters for isotope identification SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The algorithm used for isotope identification onboard a radioisotope identifier (RIID) plays a key role in obtaining a correct identification. The majority of WIN deployed by the United States Department of Homeland Security are based on NaI spectrometers. Their performance in isotope identification has been well-documented. It has been demonstrated that the secondary analysis of spectra by a trained spectroscopist is frequently necessary to resolve problems in the RIIDs identification. It is also clear that trained spectroscopists are capable of identifying complicated, multiple-line sources with even the poorest resolution detectors such as NaI. This paper seeks to understand the factors in detector performance such as energy resolution that play an important role in isotope identification. C1 [Sullivan, C. J.; Garner, S. E.; Lombardi, M.; Butterfield, K. B.; Smith-Nelson, M. A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sullivan, CJ (reprint author), Los Alamos Natl Lab, POB 1663,MS B228, Los Alamos, NM 87545 USA. OI Sullivan, Clair/0000-0003-4827-5348 NR 4 TC 4 Z9 4 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1181 EP 1184 DI 10.1109/NSSMIC.2007.4437217 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400247 ER PT S AU Jordan, DV Warren, GA AF Jordan, David V. Warren, Glen A. GP IEEE TI Simulation of nuclear resonance fluorescence in Geant4 SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Ongoing research at Pacific Northwest National Laboratory (PNNL) is assessing the utility of exploiting nuclear resonance fluorescence (NRF) to detect bulk samples of special nuclear materials, high explosives, and related illicit cargo constituents in a variety of cargo inspection scenarios. PNNL has developed a Monte Carlo radiation transport simulation capability for studying the NRF signal response in order to facilitate computational studies of these inspection scenarios. The simulation framework implements NRF as a new physics process, "G4NRF," in the Geant4 modeling toolkit, and leverages the Evaluated Nuclear Structure Data File (ENSDF) database of nuclear level properties to determine isotope-specific parameters of the NRF response model in general cargo constituents. The G4NRF package has been benchmarked against bremsstrahlung photon-beam data collected at the University of California at Santa Barbara's 5.3 MeV accelerator. A series of cargo-inspection scenario studies utilizing the NRF simulation package is currently in progress. C1 [Jordan, David V.; Warren, Glen A.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Jordan, DV (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 5 TC 5 Z9 5 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1185 EP 1190 DI 10.1109/NSSMIC.2007.4437218 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400248 ER PT S AU Vaska, P Vanier, PE Junnarkar, S Krishnamoorthy, S Pratte, JF Stoll, S AF Vaska, P. Vanier, P. E. Junnarkar, S. Krishnamoorthy, S. Pratte, J-F Stoll, S. GP IEEE TI A compact scintillator-based coded aperture imager for localizing illicit nuclear materials SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Efficient detection, localization, and identification of illicit nuclear materials is a critical need for national security. Gamma-ray signatures can be exploited for these purposes, but very high detection efficiency is needed in addition to a practical design that can be effective in the field. Modern, dense scintillators with low intrinsic background provide the highest detection efficiency (albeit at somewhat lower energy resolution than semiconductor detectors), and solid-state photodetector readout of the scintillation light can enable a compact and robust design compared to conventional photomultiplier tubes. We explore the feasibility of a coded aperture gamma-ray imager which combines gadolinium oxyorthosilicate scintillator (GSO) and avalanche photodiode (APD) readout. Each GSO crystal is 5x5 mm in cross-section and 25 mm long, and is coupled to a Hamamatsu S8664-55 APD with matching active area. 225 detectors are arrayed in a 15 x 15 matrix within a tungsten shield box. Readout is effected with a custom PC board which includes multiple 32-channel ASICs to handle preamplification, shaping, and energy and time discrimination. The output is fed to a compact data acquisition system originally designed for medical imaging with the RatCAP PET system. Various coded aperture designs are being evaluated for optimal imaging performance. Detector design and performance are presented. C1 [Vaska, P.; Vanier, P. E.; Junnarkar, S.; Krishnamoorthy, S.; Pratte, J-F; Stoll, S.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Vaska, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 1 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1195 EP 1197 DI 10.1109/NSSMIC.2007.4437220 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400250 ER PT S AU Ziock, KP Collins, J Cunningham, M Fabris, L Gee, T Goddard, J Habte, F Karnowski, T AF Ziock, K. P. Collins, J. Cunningham, M. Fabris, L. Gee, T. Goddard, J. Habte, F. Karnowski, T. GP IEEE TI The use of gamma-ray imaging to improve portal monitor performance SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE radiation portal monitor; coded-aperture imager; gamma-ray detectors; gamma-ray imagers; nuclear imaging ID CODED-APERTURE; IMAGER AB We have constructed a prototype, rapid-deployment portal monitor that uses visible-light and gamma-ray imaging to allow simultaneous monitoring of multiple lanes of traffic from the side of a roadway. Our Roadside Tracker uses automated target acquisition and tracking (TAT) software to identify and track vehicles in visible light images. The field of view of the visible camera overlaps with and is calibrated to that of a one-dimensional gamma-ray imager. The TAT code passes information on when vehicles enter and exit the system field of view and when they cross gamma-ray pixel boundaries. Based on this information, the gamma-ray imager "harvests" the gamma-ray data specific to each vehicle, integrating its radiation signature for the entire time that it is in the field of view. In this fashion we are able to generate vehicle-specific radiation signatures and avoid source confusion problems that plague nonimaging approaches to the same problem. C1 [Ziock, K. P.; Cunningham, M.; Fabris, L.; Gee, T.; Goddard, J.; Habte, F.; Karnowski, T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Collins, J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Ziock, KP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM ziockk@ornl.gov RI Fabris, Lorenzo/E-4653-2013 OI Fabris, Lorenzo/0000-0001-5605-5615 NR 15 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1198 EP 1208 DI 10.1109/NSSMIC.2007.4437221 PG 11 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400251 ER PT S AU Cunningham, MF Blakeman, E Fabris, L Habte, F Ziock, K AF Cunningham, Mark F. Blakeman, Edward Fabris, Lorenzo Habte, Frezghi Ziock, Klaus GP IEEE TI Active-mask coded-aperture imaging SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID UNIFORMLY REDUNDANT ARRAYS AB Using MCNP5 code, we modeled an existing coded-aperture, gamma-ray imaging system in order to optimize the thicknesses of its mask and detector elements. We also explored the feasibility of designing an active-mask version of the instrument where the lead elements of the mask are replaced by alkali-halide detectors. The results of these simulations indicate that increasing the detector thickness will improve the instrument's sensitivity, but, surprisingly, the active-mask system is only slightly more sensitive than the passive version. C1 [Cunningham, Mark F.; Blakeman, Edward; Fabris, Lorenzo; Habte, Frezghi; Ziock, Klaus] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Cunningham, MF (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RI Fabris, Lorenzo/E-4653-2013 OI Fabris, Lorenzo/0000-0001-5605-5615 NR 6 TC 6 Z9 6 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1217 EP 1221 DI 10.1109/NSSMIC.2007.4437224 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400254 ER PT S AU Varner, RL Beene, JR AF Varner, Robert. L. Beene, James. R. GP IEEE TI Simulation of a scintillator-based Compton telescope with micropattern readout SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We describe simulations of a Compton telescope gamma-ray detector. The model is based on scintillation detectors and low-mass, photosensitive micro-pattern detectors, particularly the plasma panel sensor. The detector model has ten to twenty layers, to maximize the probability of Compton scattering while minimizing multiple scattering in a single layer. The simulations explore optimizing the micro-pattern detector pixel geometry, the scintillator material, the total detector thickness, and the number of layers. In addition, we explored algorithms for determining the interaction position, total energy and discriminating Compton scattering from other processes. Our initial results indicate that this kind of Compton telescope can be much more efficient that silicon or germanium-based telescopes while providing very good position resolution. C1 [Varner, Robert. L.; Beene, James. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Varner, RL (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. NR 5 TC 1 Z9 1 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1248 EP 1254 DI 10.1109/NSSMIC.2007.4437230 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380400260 ER PT S AU Kim, JC Donmez, B Nelson, K He, Z AF Kim, Jaecheon Donmez, Burcin Nelson, Karl He, Zhong GP IEEE TI Three-dimensional signal correction on UltraPeRL CZT detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Three-dimensional signal correction on pixellated CdZnTe (CZT) detectors for the UltraPeRL project has been studied using Monte Carlo simulations. Each 2 cm x 2 em x 0.5 cm CZT detector has 8 X 8 pixellated anodes with a pitch of 2.4 mm. A depth and lateral correction algorithm has been developed in order to estimate both the depth of interaction (DOI) and the lateral position underneath the collecting pixel and therefore correct the signal amplitude. Using only the simple depth correction technique, the energy resolution can reach about 1.2% FWHM at 662 keV for single-pixel gamma-ray interactions. The relative detector-thickness photopeak efficiency is close to 79%. After lateral correction, the relative detector-thickness photopeak efficiency increased to about 88%, while the energy resolution changed little. C1 [Kim, Jaecheon; Donmez, Burcin; He, Zhong] Univ Michigan, Dept Nucl & Radiol Sci, Ann Arbor, MI 48109 USA. [Nelson, Karl] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Kim, JC (reprint author), Univ Michigan, Dept Nucl & Radiol Sci, Ann Arbor, MI 48109 USA. EM jaecheon@umich.edu RI Donmez, Burcin/C-8959-2016 OI Donmez, Burcin/0000-0002-9730-1998 FU DHS DNDO through Lawrence Livermore National Laboratory FX This work was supported by the DHS DNDO through the Lawrence Livermore National Laboratory UltraPeRL program. NR 2 TC 1 Z9 1 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1289 EP + DI 10.1109/NSSMIC.2007.4437237 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401003 ER PT S AU Stoll, S Woody, C AF Stoll, S. Woody, C. GP IEEE TI Determining the absolute photoelectron yield of LSO with APDs SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID AVALANCHE PHOTODIODES; X-RAYS; SCINTILLATORS; READOUT; ARRAYS; PET AB Avalanche photodiodes (APDs) are used as readout devices for LSO and many other types of scintillating crystals. In order to optimize the signal from the APD to the front end readout electronics, it is necessary to maximize the photoelectron yield from the APD crystal combination. We have studied this optimization for the RatCAP detector, which uses a 32 element pixel array of 2x2x5 mm3 LSO crystals read out with a Hamamatsu S8550 APD array. The absolute light output of several small single LSO crystals was determined using a calibrated photomultiplier tube. These crystals were then used to measure the photoelectron yield with an APD. It was found that the measured yield was similar to 22% lower than would be expected from the LSO light output combined with the overall light collection and APD quantum efficiencies. We believe this effect is due to uncertainty in the gain measurements and additional light collection factors associated with the APD. We have also found that the apparent gain of the APD, which is used in determining the photoelectron yield, is dependent on whether the input signal is visible light or X-rays and the internal structure of the apd. C1 [Stoll, S.; Woody, C.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Stoll, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 12 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1308 EP 1312 DI 10.1109/NSSMIC.2007.4437241 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401007 ER PT S AU Hollerman, WA Goedeke, SM Moore, RJ Boatner, LA Allison, SW Fontenot, RS AF Hollerman, W. A. Goedeke, S. M. Moore, R. J. Boatner, L. A. Allison, S. W. Fontenot, R. S. GP IEEE TI Unusual fluorescence emission characteristics from europium-doped lead phosphate glass caused by 3 MeV proton irradiation SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID YAG-CE AB In 1951, Birks and Black showed experimentally that the fluorescence efficiency of anthracene bombarded by alphas varies with total fluence (N) as (I/I-0) = 1/(1 + AN), where I is the fluorescence yield, I-0 is the initial fight yield, and A is a constant. Schulman observed a similar effect to the Birks and Black equation when organic anthracene was exposed to gamma irradiation. Black later observed no efficiency degradation when the phosphor was exposed to 40 keV electrons, since they only cause ionization damage with no atomic displacements. Broser and Kallmann developed a similar relationship to the Birks and Black equation for inorganic phosphors irradiated using alpha particles. These results indicate that radiation produced quenching centers compete with emission centers for absorbed energy. From 1990 to 2005, the Birks and Black relation described the reduction in emission yield for all fluorescent materials tested by the authors. In 2006, new data indicated the emission yield increased or remained constant when europium-doped lead phosphate glass samples were irradiated with 3 MeV protons. The purpose of this paper is to present the new 3 MeV irradiation results for the europium-doped lead phosphate glass samples. C1 [Hollerman, W. A.; Moore, R. J.; Fontenot, R. S.] Univ Louisiana Lafayette, Dept Phys, Lafayette, LA 70504 USA. [Goedeke, S. M.] McHale & Associates Inc, Knoxville, TN 37919 USA. [Boatner, L. A.; Allison, S. W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Hollerman, WA (reprint author), Univ Louisiana Lafayette, Dept Phys, Lafayette, LA 70504 USA. EM hollerman@louisiana.edu; goedekesm@hotmail.com RI Boatner, Lynn/I-6428-2013; OI Boatner, Lynn/0000-0002-0235-7594; Fontenot, Ross/0000-0002-9555-0878; Allison, Stephen/0000-0002-5887-5403 FU State of Louisiana Board of Regents FX The authors would like to thank Drs. Claudiu Muntele and Daryush Ila for the use of the Pelletron at CIM. The authors are also grateful for the financial support provided by the State of Louisiana Board of Regents. NR 15 TC 3 Z9 3 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1368 EP + DI 10.1109/NSSMIC.2007.4437255 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401021 ER PT S AU Li, A Smith-Nelson, M Hawari, AI Butterfield, K Garner, S AF Li, Andy Smith-Nelson, Mark Hawari, Ayman I. Butterfield, Kenneth Garner, Scott GP IEEE TI Termination effect on pulse shape discrimination SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB NE213 liquid scintillation detectors have been used in mixed radiation fields with great success due to their pulse shape discrimination (PSD) ability. Numerous PSD techniques using various analog equipments had been proposed and developed by various individuals in past years. A common method for PSD is to evaluate the fall-time of the voltage across a resistor terminating the output of the photomultiplier tube (PMT) attached to the NE213 cell. The product of the terminating resistor and the terminating capacitance is known as the time-constant. Additionally, the combination of the terminating resistance and capacitance create a high-pass filter whose characteristics depend upon the value of the time constant. The greater the time-constant the less attenuation of the longer frequencies in a given signal occur. This paper will present a quantitative comparison of the fall time PSD technique using various terminating resistors. Specifically, 50 ohm, 500 ohm and a 1 kohm termination schemes are tested. Furthermore, due to nonlinearities in the system, a linear PSD spectrum may not be possible to obtain. In such cases, a traditional figure of merit (FOND may not be usable to quantify the PSD capability of the system. A modified version of FOM is explored and used to describe the PSD capability of the current system. C1 [Li, Andy; Hawari, Ayman I.] North Carolina State Univ, Raleigh, NC 27695 USA. [Smith-Nelson, Mark; Butterfield, Kenneth; Garner, Scott] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Li, A (reprint author), North Carolina State Univ, Raleigh, NC 27695 USA. EM aoli@ncsu.edu; mnelson@lanl.gov; Ayman.Hawari@ncsu.edu; kbutterfield@lanl.gov; sgarner@lanl.gov FU U.S. Department of Energy FX This work was supported by the U.S. Department of Energy. NR 4 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1373 EP + DI 10.1109/NSSMIC.2007.4437256 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401022 ER PT S AU Dyshkant, A Blazey, G Hedin, D Zutshi, V Fisk, H Milstene, C Abrams, R AF Dyshkant, A. Blazey, G. Hedin, D. Zutshi, V. Fisk, H. Milstene, C. Abrams, R. GP IEEE TI MAPMT H7546B anode current response study for ILC SiD muon system prototype SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The proposed Si Detector concept for the ILC has barrel and end cap muon systems. An SiD scintillator based muon system prototype has 256 strips and was constructed from extruded scintilator, WLS fibers, clear fibers, and multianode photo multiplier tubes (MAPMT). Six Hamamatsu H7546B were used. As a first step to understand strip output, the response of every anode to a given brightness of light and applied voltage must be measured. For the test, a custom made light source was used. Each MAPMT output was measured independently at constant (green) input light brightness and the same photocathode to anode voltage (800V). The anode currents have a wide spread, for all tubes the maximum value is 5.23 times larger than the minimum value. The MAPMT cross talk was measured for one of the central inputs. The maximum cross talk value is about 4.9%. The average cross talk for the nearest four neighboring channels is 3.9%, for the farthest four is 1%. To assure the reproducibility and repeatability of the measurements, the double reference method was used. C1 [Dyshkant, A.; Blazey, G.; Hedin, D.; Zutshi, V.] Northern Illinois Univ, De Kalb, IL 60115 USA. [Fisk, H.; Milstene, C.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Abrams, R.] Indiana Univ, Bloomington, IN 47405 USA. RP Dyshkant, A (reprint author), Northern Illinois Univ, De Kalb, IL 60115 USA. EM dyshkant@nicadd.niu.edu; hefisk@fnal.gov FU U.S. Department of Energy [DE-AC02-07CH11359] FX This work was supported in part by the U.S. Department of Energy under the Contract No. DE-AC02-07CH11359. NR 4 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1396 EP + DI 10.1109/NSSMIC.2007.4437260 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401026 ER PT S AU Gehman, D Smith-Nelson, M Ianakiev, K Dinwiddie, D Rooney, B AF Gehman, Daniel Smith-Nelson, Mark Ianakiev, Kiril Dinwiddie, Derek Rooney, Brian GP IEEE TI Temperature dependency analysis of light output from an NE-213 liquid scintillator SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID PULSE-SHAPE-DISCRIMINATION AB NE-213 liquid scintillation detectors are currently used in radiation fields consisting of both gamma rays and fast neutrons and are an excellent tool for differentiating between each type of radiation via their respective interactions. In this experiment, an analysis was performed on an NE-213 liquid scintillation detector to investigate the effects of temperature changes on the light output. The two effects measured were the amount of the individual light decay components have to the total pulse height and the total gain of the system as a function of temperature. C1 [Gehman, Daniel; Smith-Nelson, Mark; Ianakiev, Kiril; Dinwiddie, Derek; Rooney, Brian] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gehman, D (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1432 EP 1435 DI 10.1109/NSSMIC.2007.4437269 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401035 ER PT S AU Reutter, BW Moses, WW Choong, WS Hull, GL Payne, SA Cherepy, NJ Valentine, JD AF Reutter, Bryan W. Moses, William W. Choong, Woon-Seng Hull, Giulia Payne, Stephen A. Cherepy, Nerine J. Valentine, John D. GP IEEE TI Experimental and Monte Carlo investigation of intrinsic limits of scintillator energy resolution SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE scintillator non-proportionality; energy resolution; Compton coincidence technique ID NON-PROPORTIONALITY; ELECTRON RESPONSE AB While non-proportionality is assumed to degrade scintillator energy resolution, the quantitative relationship between non-proportionality and energy resolution is not well understood. We report on the results of experimental data analysis and Monte Carlo simulation used jointly to study the relationship between scintillator electron response non-proportionality and gamma ray energy resolution. Energy resolution for Compton interactions was compared to energy resolution for photoelectric interactions, to investigate the hypothesis that non-proportionality affects these two types of interactions differently. The difference is thought to be due to low energy quanta such as Auger electrons and fluorescent x-rays produced by photoelectric interactions (which predominantly interact with inner shell electrons) but not by Compton interactions (which predominantly interact with valence electrons). A newly constructed Compton coincidence apparatus (SLYNCI) was used to measure electron response nonproportionality in NaI(Tl) that was excited by Compton-scattered electrons. Measured values for both light output vs. electron energy and energy resolution vs. electron energy were then used to predict gamma ray energy resolution, based on Monte Carlo simulations that mimicked the distribution of energetic electrons emitted following photoelectric absorption of gamma rays in the scintillator. Predicted values were compared to experimental data obtained by exciting the scintillator with isotopic sources. In this manner, the component of gamma ray energy resolution degradation due to non-proportionality was determined, as well as the electron energy resolution component due to electron response counting statistics and other possible limiting factors such as Landau fluctuations in the dE/dx along the electron track. C1 [Reutter, Bryan W.; Moses, William W.; Choong, Woon-Seng] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Hull, Giulia; Payne, Stephen A.; Cherepy, Nerine J.; Valentine, John D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Reutter, BW (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM bwreutter@lbl.gov RI Cherepy, Nerine/F-6176-2013 OI Cherepy, Nerine/0000-0001-8561-923X FU National Nuclear Security Administration; Office of Defense Nuclear Nonproliferation; Office of Nonproliferation Research and Development [NA-22]; U. S. Department of Energy [DE-AC03-76SF00098] FX This work was supported by the National Nuclear Security Administration, Office of Defense Nuclear Nonproliferation, Office of Nonproliferation Research and Development (NA-22) of the U. S. Department of Energy under Contract No. DE-AC03-76SF00098. NR 8 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1447 EP + DI 10.1109/NSSMIC.2007.4437273 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401039 ER PT S AU Szelezniak, MA Besson, A Colledani, C Dorokhov, A Dulinski, W Greiner, LC Himmi, A Hu, C Matis, HS Rose, AA Shabetai, A Stezelberger, T Sun, X Thomas, JH Valin, I Vu, CQ Wieman, HH Winter, M AF Szelezniak, Michal A. Besson, Auguste Colledani, Claude Dorokhov, Andrei Dulinski, Wojciech Greiner, Leo C. Himmi, Abdelkader Hu, Christine Matis, Howard S. Rose, Andrew A. Shabetai, Alexandre Stezelberger, Thorsten Sun, Xiangming Thomas, Jim H. Valin, Isabelle Vu, Chinh Q. Wieman, Howard H. Winter, Marc GP IEEE TI Small-scale readout system prototype for the STAR PIXEL detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SENSORS; TRACKING; PERFORMANCE; PROJECT AB A prototype readout system for the STAR PIXEL detector in the Heavy Flavor Tracker vertex detector upgrade is presented. The PIXEL detector is a Monolithic Active Pixel Sensors (MAPS) based silicon pixel vertex detector fabricated in a commercial CMOS process that integrates the detector and front-end electronics layers in one silicon die.. Two generations of MAPS prototypes designed specifically for the PIXEL are discussed. The readout architecture for the PIXEL has been recently prototyped in a telescope system consisting of three small MAPS sensors arranged into three parallel and coaxial planes. This proposed readout architecture is simple and scales to the size required to readout the final detector. The real-time hit finding algorithm necessary for data rate reduction in the 135 mega pixel detector is described, and aspects of the PIXEL system integration into the existing STAR framework are addressed. The complete system has been recently tested and shown to be fully functional. C1 [Szelezniak, Michal A.; Besson, Auguste; Colledani, Claude; Dorokhov, Andrei; Dulinski, Wojciech; Himmi, Abdelkader; Hu, Christine; Shabetai, Alexandre; Winter, Marc] Inst Pluridisciplinaire Hubert Curien, F-670037 Strasbourg, France. [Szelezniak, Michal A.; Greiner, Leo C.; Matis, Howard S.; Rose, Andrew A.; Stezelberger, Thorsten; Sun, Xiangming; Thomas, Jim H.; Vu, Chinh Q.; Wieman, Howard H.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Besson, Auguste; Colledani, Claude; Dorokhov, Andrei; Dulinski, Wojciech; Himmi, Abdelkader; Hu, Christine; Shabetai, Alexandre; Valin, Isabelle; Winter, Marc] Inst Pluridisciplinaire Hubert Curein, F-670037 Strasbourg, France. RP Szelezniak, MA (reprint author), Inst Pluridisciplinaire Hubert Curien, F-670037 Strasbourg, France. EM maszleezniak@lbl.gov; HHWieman@lbl.gov; Marc.Winter@ires.in2p3.fr FU US Department of Energy [DE-AC02-05CH11231]; Office of Nuclear Physics FX Manuscript received June 01, 2008; revised August 25, 2008. Current version published December 31, 2008. This work was supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, Office of Nuclear Physics. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1474 EP + DI 10.1109/NSSMIC.2007.4437278 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401044 ER PT S AU Heering, A Rohlf, J Freeman, J Los, S Kuleshov, S BaneIjee, S Schmidt, I Musienko, Y Lebolo, L Diaz, J AF Heering, A. Rohlf, J. Freeman, J. Los, S. Kuleshov, S. BaneIjee, S. Schmidt, I. Musienko, Y. Lebolo, L. Diaz, J. GP IEEE TI Large-area SiPMs for the CMS hadron outer calorimeter SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SILICON PHOTOMULTIPLIER SIPM; DESIGN AB We report on the measurement of pulse shape, gain, leakage current, and photon detection efficiency in 4-9 mm, state-of-the-art silicon photomultipliers (SiPMs) obtained recently from the Center of Perspective Technology and Apparatus (CPTA) in Russia, Center for Scientific and Technological Research (ITC-irst) in Italy, and Hamamatsu Corporation in Japan. The CPTA and IRST SiPMs were used to read out a hodoscope of scintillators designed for the outer layer of the hadron calorimeter of the Compact Muon Solenoid (CMS) with muon and pion beams at CERN. A direct comparison with CMS production hybrid photodiodes (HPDs) show that the SiPMs give an order of magnitude improvement in the signal to noise for single minimum ionizing particles (MIPs) and that the dynamic range is sufficient to detect up to 450 MIEN for use as a tail-catcher for late-developing hadronic showers in CMS. C1 [Heering, A.; Rohlf, J.] Boston Univ, Boston, MA 02215 USA. [Freeman, J.; Los, S.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Kuleshov, S.] Inst Theoret & Expt Phys, Moscow, Russia. [BaneIjee, S.] Tata Inst Fundamental Res, Bombay, Maharashtra, India. [Schmidt, I.] Univ Iowa, Lowa City, LA USA. [Musienko, Y.] Northeastern Univ, Boston, MA USA. [Lebolo, L.; Diaz, J.] Florida Int Univ, Miami, FL USA. RP Heering, A (reprint author), Boston Univ, Boston, MA 02215 USA. FU U.S. National Science Foundation FX We acknowledge support of the U.S. National Science Foundation. We thank Claudio Piemonte of ICT-irst, Marco Mayer of Hamamatsu, and our colleagues at ITEP-CPTA. NR 16 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1545 EP + DI 10.1109/NSSMIC.2007.4437293 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401059 ER PT S AU Conway, AM Reinhardt, CE Nikolic, RJ Nelson, AJ Wang, TF Wu, KJ Payne, SA Mertiri, A Pabst, G Roy, R Mandal, KC Bhattacharya, P Cui, YL Groza, M Burger, A AF Conway, Adam M. Reinhardt, Catherine E. Nikolic, Rebecca J. Nelson, Art J. Wang, Tzu F. Wu, Kuang J. Payne, Stephen A. Mertiri, Alket Pabst, Gary Roy, Ronald Mandal, Krishna C. Bhattacharya, Pijush Cui, Yunlong Groza, Michael Burger, Arnold GP IEEE TI Exploration of GaTe for gamma detection SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID CRYSTAL-GROWTH AB The layered III-VI semiconductor Gallium Telluride has potential for room temperature gamma ray spectroscopy applications due to its band gap of 1.67 eV, and average atomic number of 45 : 31 (Ga) and 52 (Te). The physical properties of GaTe are highly anisotropic due to covalent bonding within the layer and van der Waals bonding between layers. This work reports the results of surface and bulk processing, surface characterization, and electrical characterization of diodes formed on both the laminar and non-laminar GaTe surfaces. Alpha detection measurements were also performed. C1 [Conway, Adam M.; Reinhardt, Catherine E.; Nikolic, Rebecca J.; Nelson, Art J.; Wang, Tzu F.; Wu, Kuang J.; Payne, Stephen A.] Lawrence Livermore Natl Lab, 7000 East Ave,L-188, Livermore, CA 94550 USA. [Mertiri, Alket; Pabst, Gary; Roy, Ronald; Mandal, Krishna C.] EIC Labs Inc, Norwood, MA 02062 USA. [Bhattacharya, Pijush; Cui, Yunlong; Groza, Michael; Burger, Arnold] Univ Fisk, Dept Phys, Nashville, TN 37208 USA. RP Conway, AM (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-188, Livermore, CA 94550 USA. EM conway8@llnl.gov RI Conway, Adam/C-3624-2009 FU U.S. Department of Energy; Lawrence Livermore National Laboratory [DE-AC52-07NA27344, UCRL-CONF-236692]; DNDO [HSHQDC-07-C-00034]; EIC Laboratories, Inc FX This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, UCRL-CONF-236692. This work was performed with partial support from DNDO (Contract: HSHQDC-07-C-00034) under a subcontract with EIC Laboratories, Inc. NR 5 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1551 EP + DI 10.1109/NSSMIC.2007.4437294 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401060 ER PT S AU Nikolic, RJ Conway, AM Reinhardt, CE Graff, RT Wang, TF Deo, N Cheung, CL AF Nikolic, Rebecca J. Conway, Adam M. Reinhardt, Catherine E. Graff, Robert T. Wang, Tzu Fang Deo, Nirmalendu Cheung, Chin Li GP IEEE TI Fabrication of pillar-structured thermal neutron detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Pillar detector is an innovative solid state device structure that leverages advanced semiconductor fabrication technology to produce a device for thermal neutron detection. State-of-the-art thermal neutron detectors have shortcomings in achieving simultaneously high efficiency, low operating voltage while maintaining adequate fieldability performance. By using a 3-dimensional silicon PIN diode pillar array filled with isotopic boron 10, (B-10) a high efficiency device is theoretically possible. The fabricated pillar structures reported in this work are composed of 2 mu m diameter silicon pillars with a 4 pm pitch and pillar heights of 6 and 12 mu m. The pillar detector with a 12 pm height achieved a thermal neutron detection efficiency of 7.3% at 2V. C1 [Nikolic, Rebecca J.; Conway, Adam M.; Reinhardt, Catherine E.; Graff, Robert T.; Wang, Tzu Fang] Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. [Deo, Nirmalendu; Cheung, Chin Li] Univ Nebraska, Lincoln, NE 68588 USA. RP Nikolic, RJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM nikolic1@llnl.gov; ccheung2@unl.edu RI Conway, Adam/C-3624-2009 FU U.S. Department of Energy; Lawrence Livermore National Laboratory [DE-AC52-07NA27344, UCRL-PROC-236680] FX This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, UCRL-PROC-236680. NR 7 TC 9 Z9 9 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1577 EP + DI 10.1109/NSSMIC.2007.4437299 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401065 ER PT S AU Carini, GA Chen, W Li, Z Rehak, P Siddons, DP AF Carini, G. A. Chen, W. Li, Z. Rehak, P. Siddons, D. P. GP IEEE TI X-ray Active Matrix Pixel Sensors based on J-FET technology developed for the Linac Coherent Light Source SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID HIGH-RESISTIVITY SILICON AB An X-ray Active Matrix Pixel Sensor (XAMPS) is being developed for recording data for the X-ray Pump Probe experiment at the Linac Coherent Light Source (LCLS). Special attention has to be paid to some technological challenges that this design presents. New processes were developed and refined to address problems encountered during previous productions of XAMPS. The development of these critical steps and corresponding tests results are reported here. C1 [Carini, G. A.; Chen, W.; Li, Z.; Rehak, P.; Siddons, D. P.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Carini, GA (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1603 EP 1606 DI 10.1109/NSSMIC.2007.4437305 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401071 ER PT S AU Hathaway, AG Moxom, J Hawari, AI Xu, J AF Hathaway, Alfred G. Moxom, Jeremy Hawari, Ayman I. Xu, Jun GP IEEE TI Design of a slow pulsed positron beam for positron annihilation lifetime spectroscopy SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE slow positron; pulsed positron beam; PALS-spectrometry; research reactor ID SYSTEM AB Positron annihilation spectroscopy provides a useful tool for the non-destructive study of subsurface microscopic defects. Variations in the electronic environment, from that of the bulk of the material, caused by defects introduce coulombic forces which cause positrons to localize at the site of defects. This lifetime can vary from nanoseconds, if the positron forms a positronium atom before annihilation, to picoseconds if it is involved in pick-off annihilation. By bunching the incident positron beam, the time-resolution of a measurement can greatly be enhanced, allowing the observation of the variation in the lifetime of positrons that undergo pick-off annihilation, which occurs in metals and semi-conductors. This is achieved by narrowing the resolution function of the detection system, which allows the measurement of shorter lifetime components. This improved timing resolution, over other techniques, comes at the expense of more complex electronics but is capable of performing measurements over a wide range of timing resolutions. Simulations have been preformed to optimize the design of a bunched slow positron beam to be implemented at North Carolina State University. For the proposed apparatus, the DC beam produced by the positron source at the 1-MW PULSTAR reactor, located at NCSU, must first be chopped into small pulses. This is accomplished by applying a time-varying potential to a re-moderator in the beam line. This waveform accelerates positrons emitted from a transmission moderator, which the incident beam is focused upon, into bunches. This time-varying field has been calculated and is capable of accelerating positrons into pulses approximately 8.5ns wide with a FWHM of 4ns. Following this initial chopping stage, the positron pulses undergo further time focusing using applied rf fields to coaxial resonators. Current simulations demonstrate the capability of supplying a 2.4ns (FWHM) pulse to the double harmonic buncher for final time focusing. The goal is to produce a pulsed positron beam with a time resolution of less than 100ps capable of implanting positrons with kinetic energy up to 30kV. C1 [Hathaway, Alfred G.; Moxom, Jeremy; Hawari, Ayman I.] North Carolina State Univ, Dept Nucl Engn, Raleigh, NC 27695 USA. [Xu, Jun] Oak Ridge Natl Lab, Chem & Anal Sci Div, Oak Ridge, TN USA. RP Hathaway, AG (reprint author), North Carolina State Univ, Dept Nucl Engn, Raleigh, NC 27695 USA. EM aghathaw@ncsu.edu; jmoxom@ncsu.edu; ayman.hawari@ncsu.edu; yxn@ornl.gov NR 13 TC 1 Z9 1 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1695 EP + DI 10.1109/NSSMIC.2007.4437327 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401093 ER PT S AU Anderson, JT Brito, R Doering, D Hayden, T Holmes, B Joseph, J Yaver, H Zimmermann, S AF Anderson, John T. Brito, Renato Doering, Dionisio Hayden, Todd Holmes, Bryan Joseph, John Yaver, Harold Zimmermann, Sergio GP IEEE TI Data acquisition and trigger system of the Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA) SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA), capable of determining the energy and position (within 2mm) of each gamma-ray interaction point and tracking multiple gamma-ray interactions, has been designed. GRETINA will be composed of seven detector modules, each with four highly pure germanium crystals. Each crystal has 36 segments and one central contact instrumented by charge sensitive amplifiers. Two custom designed modules, the Digitizer/Digital Signal Processing (DSP) and the Trigger Timing & Control (TTC), compose the electronics of this system. The Digitizer/DSP converts the analog information with 14-bit analog to digital converters (operating at 100 Msamples/sec, and digitally processes the data to determine the energy and timing information of the gamma interactions with the crystal. Each Digitizer/DSP is controlled by and sends trigger information to the Trigger Timing & Control system through a bidirectional Gbit link Presently four different trigger algorithms are planned for the trigger system and can be selected for trigger decision. In this paper the details of the electronics and algorithms of the GRETINA data acquisition and trigger system are presented and the performance is reviewed. C1 [Brito, Renato; Doering, Dionisio; Holmes, Bryan; Joseph, John; Yaver, Harold; Zimmermann, Sergio] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Anderson, John T.; Hayden, Todd] Argonne Natl Lab, Argonne, IL 60439 USA. RP Zimmermann, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM szimmermann@lbl.gov FU Director, Office of Science, Office of Nuclear Physics; U.S. Department of Energy [DE-AC02-05CH11231] FX This work was supported by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Department of Energy under Contract DE-AC02-05CH11231. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1751 EP + DI 10.1109/NSSMIC.2007.4436499 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401105 ER PT S AU Battaglia, M Bussat, JM Contarato, D Denes, P Giubilato, P Glesener, LE AF Battaglia, Marco Bussat, Jean-Marie Contarato, Devis Denes, Peter Giubilato, Piero Glesener, Lindsay E. GP IEEE TI Development of CMOS monolithic pixel sensors with in-pixel correlated double sampling and fast readout for the ILC SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SIMULATION AB This paper presents the design and results of detailed tests of a CMOS active pixel chip for charged particle detection with in-pixel charge storage and correlated double sampling readout in rolling shutter mode at frequencies up to 25 MHz. This detector is developed in the framework of R&D for the Vertex Tracker for the International Linear Collider. C1 [Battaglia, Marco] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Bussat, Jean-Marie; Contarato, Devis; Denes, Peter; Glesener, Lindsay E.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Giubilato, Piero] Ist Nazl Fis Nucl, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Battaglia, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM mbattaglia@lbl.gov OI Giubilato, Piero/0000-0003-4358-5355 FU U.S. Department of Energy [DE C02-05CH11231] FX This work was supported by the Director, Office of Science, of the U.S. Department of Energy under Contract DE C02-05CH11231 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1780 EP + DI 10.1109/NSSMIC.2007.4436505 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401111 ER PT S AU Bolotnikov, AE Abdul-Jabber, N Babalola, S Camarda, GS Cui, Y Hossain, A Jackson, E Jackson, H James, J Kohman, KT Luryi, A James, RB AF Bolotnikov, A. E. Abdul-Jabber, N. Babalola, S. Camarda, G. S. Cui, Y. Hossain, A. Jackson, E. Jackson, H. James, J. Kohman, K. T. Luryi, A. James, R. B. GP IEEE TI Effects of Te Inclusions on the Performance of CdZnTe Radiation Detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE CdZnTe; radiation detectors; Te inclusions ID DEFECTS; GROWTH AB Te inclusions existing at high concentrations in CdZnTe (CZT) material can degrade the performance of CZT detectors. These microscopic defects trap the free electrons generated by incident radiation, so entailing significant fluctuations in the total collected charge and thereby strongly affecting the energy resolution of thick (long-drift) detectors. Such effects were demonstrated in thin planar detectors, and, in many cases, they proved to be the dominant cause of the low performance of thick detectors, wherein the fluctuations in the charge losses accumulate along the charge's drift path. We continued studying this effect using different tools and techniques. We employed a dedicated beam-line recently established at BNL's National Synchrotron Light Source for characterizing semiconductor radiation detectors, along with an IR transmission microscope system, the combination of which allowed us to correlate the concentration of defects with the devices' performances. We present here our new results from testing over 50 CZT samples grown by different techniques. Our goals are to establish tolerable limits on the size and concentrations of these detrimental Te inclusions in CZT material, and to provide feedback to crystal growers to reduce their numbers in the material. C1 [Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Hossain, A.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11793 USA. [Abdul-Jabber, N.] Univ Michigan, Ann Arbor, MI 48104 USA. [Babalola, S.; Jackson, E.; Jackson, H.] Vanderbilt Univ, Nashville, TN 37235 USA. [James, J.] Tennessee Technol Univ, Cookeville, TN 38505 USA. [Kohman, K. T.] Kansas State Univ, Manhattan, KS 66506 USA. [Luryi, A.] Cornell Univ, Ithaca, NY 14853 USA. RP Bolotnikov, AE (reprint author), Brookhaven Natl Lab, Upton, NY 11793 USA. EM bolotnik@bnl.gov FU U.S. Department of Energy; Office of Nonproliferation Research and Engineering [NA-22]; Brookhaven Science Associates; LLC [DE-AC02-98CH1-886] FX This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Engineering, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract DE-AC02-98CH1-886 with the U.S. Department of Energy. NR 16 TC 6 Z9 6 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1788 EP + DI 10.1109/NSSMIC.2007.4436507 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401113 ER PT S AU Camarda, GS Bolotnikov, AE Cui, Y Hossain, A Awadalla, SA Mackenzie, J Chen, H James, RB AF Camarda, G. S. Bolotnikov, A. E. Cui, Y. Hossain, A. Awadalla, S. A. Mackenzie, J. Chen, H. James, R. B. GP IEEE TI Polarization Studies of CdZnTe Detectors Using Synchrotron X-Ray Radiation SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB High densities of impurities and defects lead to severe charge-carrier trapping that can be major issues in assuring the high performance of CZT detectors. For some medical- imaging applications, the typical X-ray flux can be very high. Under such high irradiation conditions, the trapped charge builds up inside the detector affecting its stability. This phenomenon generally is termed the polarization effect. We conducted detailed studies on polarization in CZT crystals employing a highly collimated synchrotron x-ray radiation source available at Brookhaven's National Synchrotron Light Source (NSLS). We were able to induce polarization effects by irradiating specific areas within the detector. These measurements allowed us to make, for the first time, a quantitative comparison between areas where polarization is induced, and the electron- and hole-collection X-ray maps obtained at low flux, where no polarization is induced. We discuss the results of these polarization studies. C1 [Camarda, G. S.; Bolotnikov, A. E.; Cui, Y.; Hossain, A.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11793 USA. [Awadalla, S. A.; Mackenzie, J.; Chen, H.] Redlen Technol Sidney, Sidney, BC V8L 5Y8, Canada. RP Camarda, GS (reprint author), Brookhaven Natl Lab, Upton, NY 11793 USA. EM giuseppec@bnl.gov; henry.chen@redlen.com FU U.S. Department of Energy, Office of Nonproliferation Research and Engineering [NA-22]; U.S. Department of Energy [DE-AC02-98CH1-886] FX This work was supported by the U.S. Department of Energy, Office of Nonproliferation Research and Engineering, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U.S. Department of Energy. NR 6 TC 0 Z9 1 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1798 EP + DI 10.1109/NSSMIC.2007.4436508 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401114 ER PT S AU Sullivan, CJ Burger, A Groza, M Prettyman, TH AF Sullivan, C. J. Burger, A. Groza, M. Prettyman, T. H. GP IEEE TI Bulk Uniformity of Cadmium Zinc Telluride (CZT) Crystals for Large Volume Coplanar Gamma Spectrometers SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID INTERNAL ELECTRIC-FIELD; RADIATION DETECTORS; RAY-DETECTORS AB Gamma ray spectroscopy for remote sensing applications requires a high sensitivity that can be achieved by a combination of high efficiency and high energy resolution for high energy gamma rays (up to 1 MeV). While cryogenic germanium detectors or LaBr3:Ce3(+) scintillators could in principle satisfy the requirements of many such applications, the search for compact, portable systems that do not require cooling or the use of photomultiplier tubes are still underway. State-of-the-art CdZnTe spectrometers having an energy resolution exceeding 1% have been recently demonstrated, however they have a typical volume that is less than 1 cm(3). Large volume (greater than 3 cm(3)) CdZnTe spectrometers with an energy resolution that is better than 3% are not yet commercially available, although the size of large single crystals that would satisfy the volume requirement can now be grown by various companies with reasonable yield. In this study we have investigated the feasibility of using commercially available large (1 - 6 cm(3)) detector grade CdZnTe single crystals to fabricate coplanar gamma spectrometers with a targeted performance that exceeds 3% energy resolution at 662 keV. The fabrication of optimal performance coplanar detectors requires a custom design that might vary for each crystal growth method. Besides the knowledge of the average values of charge carrier concentrations, mobilities and trapping times the physics-based model requires the knowledge of bulk nonuniformities and their effects on local variations in the electric field and electron mobility-trapping-time product. All crystals investigated had tellurium, as second phase. A new type of material inhomogeneity, and its influence on detector's performance, became apparent only in large volume crystals and will be reported. C1 [Sullivan, C. J.; Prettyman, T. H.] Los Alamos Natl Lab, POB 1663,MS B228, Los Alamos, NM 87545 USA. [Burger, A.; Groza, M.] Fisk Univ, Dept Phys, Nashville, TN 37208 USA. RP Sullivan, CJ (reprint author), Los Alamos Natl Lab, POB 1663,MS B228, Los Alamos, NM 87545 USA. EM clair@lanl.gov; aburger@fisk.edu OI Prettyman, Thomas/0000-0003-0072-2831; Sullivan, Clair/0000-0003-4827-5348 FU Yinnel Tech; Orbotech FX The authors wish to acknowledge the support of Yinnel Tech and Orbotech. NR 8 TC 3 Z9 3 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1805 EP + DI 10.1109/NSSMIC.2007.4436509 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401115 ER PT S AU Taylor, S AF Taylor, Simon GP IEEE TI The forward drift chamber system for the GlueX detector SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Thomas Jefferson National Accelerator Facility (TJNAF) is planning an upgrade of the existing electron beam energy from 6 GeV to 12 GeV. The program calls for the construction of a new experimental hall - Hall D - and a new Tagger hall in which the electron beam will be converted to a photon beam that interacts with a target at the center of the GlueX detector housed in Hall D. The detector is based on a solenoidal design with drift chambers and a lead-scintillator calorimeter inside the bore of the magnet and sets of time-of-flight scintillators and lead-glass crystals in the downstream direction outside of the magnet. The Forward Drift Chambers will measure the paths of charged particles travelling in the forward direction downstream of the target. Each chamber unit will consist of a wire plane flanked on either side by cathode planes divided into strips. The combination of wire and cathode readout allows for reconstruction of "space points" at several positions along the beam line. A small-scale prototype of one unit has been constructed and studied with cosmic rays. The best resolution obtained on the bench for the coordinate along the wire is 158 +/- 3 mu m averaged over multiple anode wires, meeting our design goal of < 200 mu m. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Taylor, S (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 1 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1901 EP 1903 DI 10.1109/NSSMIC.2007.4436527 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401133 ER PT S AU Chen, W Carini, GA De Geronimo, G Fried, J Gaskin, JA Keister, JW Li, Z Ramsey, BD Rehak, P Siddons, DP AF Chen, W. Carini, G. A. De Geronimo, G. Fried, J. Gaskin, J. A. Keister, J. W. Li, Z. Ramsey, B. D. Rehak, P. Siddons, D. P. GP IEEE TI Development of Thin-Window Silicon Drift Detector for X-ray spectroscopy SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB A new set of Thin-Window Silicon Drift Detectors composed of an array of hexagonal shaped detectors has been designed, constructed and tested for X-ray spectroscopy. Each individual ThinWinSDD has a thin entrance window on one side and a spiral shaped hexagonal cathode around a center anode on the other side. To produce the thin entrance window a 10 keV implantation of boron through a 500 angstrom silicon dioxide was used. The implantation was followed by an annealing at 700 degrees C for 30 min and a reactive ion etching step to ensure the removal of silicon dioxide from the smallest feature (5 mu m). An aluminum layer is coated in the same vacuum system after back-sputtering. This step involves removing the native oxide that has formed on the top of the silicon substrate and then sputtering a 1100 angstrom thick layer of aluminum onto the X-ray entrance window. The aluminum layer must be thick enough to block visible tight, but thin enough to be transparent to soft x-rays down to 280 eV. We discuss first test results that include detector leakage current measurements and the response for multiple detectors exposed to the National Synchrotron Light Source's UV beam line U3C located at Brookhaven National Laboratory for X-ray energies as low as 280 eV. C1 [Chen, W.; Carini, G. A.; De Geronimo, G.; Fried, J.; Li, Z.; Rehak, P.; Siddons, D. P.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Gaskin, J. A.; Ramsey, B. D.] Natl Space Sci & Technol Ctr, MSFC, Huntsville, AL 35805 USA. [Keister, J. W.] SFA Inc, Brookhaven Natl Lab, Upton, NY 11973 USA. RP Chen, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. FU U.S. Department of Energy [DE-AC02-98CH10886] FX This work was supported in part by the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. NR 7 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1954 EP + DI 10.1109/NSSMIC.2007.4436537 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401143 ER PT S AU Chi, CY Anderson, W Azmoun, B Citron, Z Dubey, A Durham, M Fraenkel, Z Harder, J Hemmick, T Kamin, J Kozlov, A Milov, A Naglis, M O'Connor, P Pisani, RP Radeka, V Ravinovich, I Sakaguchi, T Sharma, D Sickles, A Sippach, FW Stoll, S Tserruya, I Woody, C Yu, B AF Chi, C. -Y. Anderson, W. Azmoun, B. Citron, Z. Dubey, A. Durham, M. Fraenkel, Z. Harder, J. Hemmick, T. Kamin, J. Kozlov, A. Milov, A. Naglis, M. O'Connor, P. Pisani, R. P. Radeka, V. Ravinovich, I. Sakaguchi, T. Sharma, D. Sickles, A. Sippach, F. W. Stoll, S. Tserruya, I. Woody, C. Yu, B. GP IEEE TI A faster digitizer system for the Hadron Blind Detector in PHENIX SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB A Hadron Blind Detector (HBD) has been installed in the PHENIX experiment at the Relativistic Heavy Ion Collider (RIHC). A 2300 channel compact 12-bit 60 MHz digitizer system has been built to read the HBD system. The raw signals are shaped with 70 ns rise time and are directly digitized. The time and charge of the raw signals can be calculated from the multiple samples. The system is designed to handle Level 1 (M) trigger rates up to 25 KHz with 5 L1 event buffers. Large amounts of data are generated after the ADC. Issues regarding clock distribution, data handling, event buffers, and L1 trigger primitive generations have been addressed. The overall system performance will also be discussed. C1 [Azmoun, B.; Milov, A.; Pisani, R. P.; Sakaguchi, T.; Sickles, A.; Stoll, S.; Woody, C.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. [Chi, C. -Y.; Sippach, F. W.] Columbia Univ, Nevis Labs, Irvington, NY USA. [Dubey, A.; Fraenkel, Z.; Kozlov, A.; Naglis, M.; Ravinovich, I.; Sharma, D.; Tserruya, I.] Weizmann Inst Sci, Dept Phys Particle, IL-76100 Rehovot, Israel. [Harder, J.; O'Connor, P.; Radeka, V.; Yu, B.] Brookhaven Natl Lab, Div Instrumentat, Upton, NY 11973 USA. [Anderson, W.; Citron, Z.; Durham, M.; Hemmick, T.; Kamin, J.] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA. RP Woody, C (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM woody@bnl.gov FU U.S. Department of Commerce [BS123456] FX This work was supported in part by the U.S. Department of Commerce under Grant No. BS123456 (sponsor acknowledgment goes here). NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 1997 EP + DI 10.1109/NSSMIC.2007.4436545 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401151 ER PT S AU Caggiano, JA Warren, GA Korbly, SE Hasty, RA Klimenko, A Park, WH AF Caggiano, Joseph A. Warren, Glen A. Korbly, Stephen E. Hasty, Richard A. Klimenko, Alexei Park, William H. GP IEEE TI Nuclear Resonance Fluorescence measurements of high explosives SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Pacific Northwest National Laboratory and Passport Systems have collaborated to perform Nuclear Resonance Fluorescence (NRF) experiments using several high quality high-explosive simulant samples. These measurements were conducted to determine the feasibility of finding and characterizing high explosive material by NRF interrogation. Bremstrahlung photon beams, produced from electron beams of 5.1, 5.3, 8.3, 9 and 10 MeV, irradiated the samples. Gamma-rays emitted from the samples were detected using high-purity germanium detectors. Nitrogen-to-carbon ratios of the high-explosive simulants were extracted from the 5.1 and 5.3 MeV data and compare favorably with accepted values. Analysis of the 8, 9 and 10 MeV data is in progress; preliminary isotopic comparisons within the samples are consistent with the expected results. C1 [Caggiano, Joseph A.; Warren, Glen A.] Pacific Northwes Natl Lab, POB 999-MS,P8-20, Richland, WA 99352 USA. [Korbly, Stephen E.; Hasty, Richard A.; Klimenko, Alexei; Park, William H.] Passport Syst Inc, North Billerica, MA 01862 USA. RP Caggiano, JA (reprint author), Pacific Northwes Natl Lab, POB 999-MS,P8-20, Richland, WA 99352 USA. EM jac.caggiano@pnl.gov; glen.warren@pnl.gov FU U.S. Department of Energy by Battelle Memorial Institute [DE-AC06-76RLO 1830]; U.S. Department of Homeland Security Domestic Nuclear Detection Office (DHS/DNDO).; DHS/DNDO [N66001-07-D-0025]; Office of Naval Research [N00014-06-1-0482] FX Pacific Northwest National Laboratory (PNNL) is operated for the U.S. Department of Energy by Battelle Memorial Institute under Contract DE-AC06-76RLO 1830. Funding for PNNLs contribution to this project was funded by the U.S. Department of Homeland Security Domestic Nuclear Detection Office (DHS/DNDO). Funding for Passports Systems, Inc. contribution to this project was provided by DHS/DNDO contract N66001-07-D-0025 and by the Office of Naval Research under Grant N00014-06-1-0482 NR 3 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2045 EP + DI 10.1109/NSSMIC.2007.4436554 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401160 ER PT S AU Warren, GA Caggiano, JA Miller, EA Bertozzi, W Klimenko, A Korbly, SE Ledoux, RJ Park, WH AF Warren, Glen A. Caggiano, Joseph A. Miller, Erin A. Bertozzi, William Klimenko, Alexei Korbly, Stephen E. Ledoux, Robert J. Park, William H. GP IEEE TI Nuclear resonance fluorescence of U-235 above 3 MeV SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Pacific Northwest National Laboratory and Passport Systems have collaborated to conduct measurements to search for a nuclear resonance fluorescence response of 235 U from 3 to 5 MeV using an 8 g sample of highly enriched uranium. These new measurements complement previously reported measurements below 3 MeV. Preliminary analysis indicates that no strong resonances exist for U-235 in this energy range. A second set of measurements focused on a signature search in the 5 to 10 MeV range is still under analysis. C1 [Warren, Glen A.; Caggiano, Joseph A.; Miller, Erin A.] Pacific Northwest Natl Lab, POB 999-MS P8-20, Richland, WA 99352 USA. [Bertozzi, William] Passport Syst, Acton, MA 01720 USA. [Bertozzi, William] MIT, Nucl Sci Lab, Dept Phys, Cambridge, MA 02139 USA. [Korbly, Stephen E.; Ledoux, Robert J.; Park, William H.] Passport Syst, North Billerica, MA 01862 USA. RP Warren, GA (reprint author), Pacific Northwest Natl Lab, POB 999-MS P8-20, Richland, WA 99352 USA. EM glen.warren@pnl.gov; jac.caggiano@pnl.gov; erin.miller@pnl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2047 EP + DI 10.1109/NSSMIC.2007.4436555 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401161 ER PT S AU Mascarenhas, N Brennan, J Krenz, K Marleau, P Nrowka, S AF Mascarenhas, Nicholas Brennan, James Krenz, Kevin Marleau, Peter Nrowka, Stanley GP IEEE TI A measurement of the flux, angular distribution and energy spectra of cosmic ray induced neutrons at fission energies SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB When searching for SNM simply designing a better detector to optimize the signal S from the source is not enough. It is important to know the background B to maximize S/N, where N is the noise in B. Cosmic rays are a dominant source of neutron background. It is therefore important to know their flux, angular and energy distribution. Over the last 50 years work has been done to study cosmic ray neutrons and their variation. The full hemispherical neutron flux is usually quoted at a certain altitude (e.g. Altitude = 0 meters above sea level, pressure = 1033 g/cm(2)) and geomagnetic rigidity (e.g. GMR = 1.2GV). Neutron fluxes at other locations are scaled from the sea level data using a well determined prescription. However, there is a lack in knowledge of the angular dependence of the neutron flux at sea level. The angular dependence is important for two reasons; first many detectors have an efficiency that changes with the direction of the incident neutron. Second none of the measurements to date have determined how the flux changes with angle, their data must be modeled to estimate the full hemispherical flux. In this paper we present the cosmic neutron background flux measured by a neutron scatter camera in the energy range 0.2-10MeV. Our measurements are in agreement with the best fit to past data. We present for the V time the neutron zenith angle dependence at fission energies which is observed to be a function of the form cos(2.7)Theta.. C1 [Mascarenhas, Nicholas; Brennan, James; Krenz, Kevin; Marleau, Peter; Nrowka, Stanley] Sandia Natl Labs, Livermore, CA 94551 USA. RP Mascarenhas, N (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. NR 3 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2050 EP 2052 DI 10.1109/NSSMIC.2007.4436556 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401162 ER PT S AU Zorn, CJ AF Zorn, Carl J. GP IEEE TI A study of silicon photomultiplier sensor prototypes for readout of a scintillating fiber lead sheet barrel calorimeter SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The GlueX collaboration is designing a detector system to study exotic hybrid meson states at the upgrade beam line of Jefferson Laboratory. The hermetic detector includes a cylindrical electromagnetic calorimeter based on the scifi design used in KLOE, SPACAL, and JETSET. Since the calorimeter will be placed within a 2.24 tesla axial magnetic field, the optimal readout solution will include a solid state photodetector known as the silicon photomultiplier. This is an array of avalanche photodiode microcells operated in geiger mode with the output summed from all the microcells. The result is a photodetector with many of the same characteristics of vacuum photomultipliers such as high gain (10(6)) and fast response, but with the additional advantage of immunity to high magnetic fields and superior quantum efficiency. This study is a report on the characteristics of a variety of prototype devices being developed by SensL of Cork, Ireland. The chief parameters being studied are photon detection efficiency (PDE), gain, dark noise, linearity, dynamic range, optimum operating voltage, and stability. This is a status report for an ongoing study. C1 Jefferson Lab, Detector & Imaging Grp, Newport News, VA 23606 USA. RP Zorn, CJ (reprint author), Jefferson Lab, Detector & Imaging Grp, Newport News, VA 23606 USA. EM carl.zorn@jlab.org NR 9 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2099 EP 2104 DI 10.1109/NSSMIC.2007.4436568 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401174 ER PT S AU Amerio, S Casarsa, M Cortiana, G Donini, J Lucchesi, D Griso, SP Ristori, L AF Amerio, S. Casarsa, M. Cortiana, G. Donini, J. Lucchesi, D. Griso, S. Pagan Ristori, L. GP IEEE TI Performances of a trigger based on b-jets tagging at CDF II SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE Tevatron; CDF; trigger; b-tag; Higgs boson ID BROKEN SYMMETRIES; BOSONS AB In this paper we describe the development and the performance studies of a trigger devoted to the identification of b-jets final state events in p (p) over bar interactions at the CDF II experiment of Tevatron collider at Fermilab. Exploiting new trigger primitives provided by two recent trigger upgrades, the Level2 XFT stereo tracking [1] and the improved Level2 cluster-finder [2] [3], in conjunction with the existing Silicon Vertex T racker (SVT) [4] [5], we design an online trigger algorithm aimed at selecting good purity b-jets samples useful for many physics measurements, one of the most important being inclusive searches for the Standard Model Higgs boson. We describe the performances of the proposed algorithm, which must guarantee high efficiency on signal events while maintaining sustainable rate at the luminosity of 3.10(32) cm(-2) s(-1) reachable at the Tevatron. C1 [Amerio, S.; Cortiana, G.; Donini, J.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, Ist Nazl Fis Nucl, I-35100 Padua, Italy. [Casarsa, M.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Ristori, L.] Ist Nazl Fis Nucl Pisa, Pisa, Italy. RP Amerio, S (reprint author), Univ Padua, Ist Nazl Fis Nucl, I-35100 Padua, Italy. FU U.S. Department of Energy; National Science Foundation; Italian Istituto Nazionale di Fisica Nucleare; Ministry of Education, Culture, Sports, Science and Technology of Japan; Natural Sciences and Engineering Research Council of Canada; National Science Council of the Republic of China; Swiss National Science Foundation; A.P. Sloan Foundation; Bundesministerium fur Bildung und Forschung, Germany; Korean Science and Engineering Foundation; Korean Research Foundation; Astronomy Research Council and the Royal Society, UK; Institut National de Physique Nucleaire et Physique des Particules/CNRS; Russian Foundation for Basic Research; Comisi on Interministerial de Ciencia y Tecnologia, Spain; European Community's Human Potential Programme; Slovak RD Agency; Academy of Finland FX We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium fur Bildung und Forschung, Germany; the Korean Science and Engineering Foundation and the Korean Research Foundation; the Particle Physics and Astronomy Research Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Comisi on Interministerial de Ciencia y Tecnologia, Spain; the European Communitys Human Potential Programme; the Slovak R&D Agency; and the Academy of Finland. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2118 EP + DI 10.1109/NSSMIC.2007.4436572 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401178 ER PT S AU Butler, J Cundiff, T Drake, G Haberichter, WN Hazen, E Hoff, J Holm, S Kreps, A May, E Repond, J Underwood, D White, AP Wu, SX Xia, L Yu, J AF Butler, John Cundiff, Tim Drake, Gary Haberichter, William N. Hazen, Eric Hoff, Jim Holm, Scott Kreps, Andrew May, Ed Repond, Jose Underwood, Dave White, Andrew P. Wu, Shouxiang Xia, Lei Yu, Jaehoon GP IEEE TI A new readout system for "Digital Hadron Calorimetry" for the International Linear Collider SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB A new detector concept called "digital calorimetry" is being developed for the International Linear Collider to achieve unprecedented jet energy resolution. Instead of traditional tower geometry and energy summation from many sampling layers, the new approach detects energy deposition in 1 cm 2 cells on each sampling layer using discriminators. Jets are reconstructed using hit patterns from each layer, combined with information from inner tracking and the electromagnetic calorimeter. Detector R&D is in progress, and we are building a readout system for a 400,000 channel "prototype detector" to demonstrate this concept. The readout system uses a 64-channel custom integrated circuit called DCAL to record hits from each cell and apply a global timestamp. The chips mount directly on sophisticated front-end boards that are not only an integral part of the charge collection of the detector chambers, but also incorporate digital signal transmission, clock and control, and power and ground. The readout of data is serial, multiplexed into high-speed serial streams and sent to a "back-end" VME system for time-sorting and higher-level triggering. The system can be operated with an external trigger or be self-triggered, and can produce trigger signals from the front-end chips. We have built a "vertical slice" of the readout system, and are using it for tests of Resistive Plate Chambers (RPCs) and Gas Electron Multipliers (GEMs) in a test beam at Fermilab. This represents the first stage in building a 400,000 channel system for reading out the "cubic meter" prototype detector as part of the CALICE collaboration. The components of the system are described, and preliminary system performance is reported. C1 [Butler, John; Hazen, Eric; Wu, Shouxiang] Boston Univ, Boston, MA 02215 USA. [Drake, Gary; Haberichter, William N.; Kreps, Andrew; May, Ed; Repond, Jose; Underwood, Dave] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Hoff, Jim; Holm, Scott] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [White, Andrew P.; Yu, Jaehoon] Univ Texas Arlington, Arlington, TX 76019 USA. RP Butler, J (reprint author), Boston Univ, Boston, MA 02215 USA. EM hazen@joule.bu.edu; drake@anl.gov; jimhoff@fnal.gov; repond@hep.anl.gov; awhite@uta.edu; jaehoonyu@uta.edu NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2145 EP + DI 10.1109/NSSMIC.2007.4436577 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401183 ER PT S AU Li, Z Verbitskaya, E Eremin, V Harkonen, J Li, M AF Li, Zheng Verbitskaya, E. Eremin, V. Haerkoenen, J. Li, Michael GP IEEE TI Space charge sign inversion and electric field reconstruction in 24 GeV proton irradiated MCZ Si p(+)-n(TD)-n(+) detectors processed via thermal donor introduction SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SILICON DETECTORS; MAGNETIC CZOCHRALSKI AB The aim of this study is evaluation of radiation effects in detectors based on p-type MCZ Si, and converted afterwards to n-type by thermal donor (TD) introduction. As-processed p-pn(+) detectors were annealed at 450 degrees C resulting in p(+)-n(TD)-n(+) structures. Space charge sign and electric field distribution E(x) in MCz Si p(+)-n(TD)-n(+) detectors irradiated by 24 GeV/c protons were analyzed using the data on current pulse response and the approach for Double Peak electric field distribution E(x) in heavily irradiated detectors. The approach considers irradiated detector as a structure with three regions in which the electric field depends on the coordinate and the induced current pulse response arises from drift process in the detector with variable electric field. Reconstruction of Eft) profile from pulse response shapes is performed employing new method for DP electric field reconstruction. This method includes: a) direct extraction of charge loss due to trapping, and b) the fitting of simulated pulse response to the "corrected" pulse by adjusting the electric field profiles in the three regions. Reconstruction of E(x) distribution showed that in the diodes irradiated by 24 x 10(14) p/cm(2) space charge sign inversion has been occurred. This is the evidence that the influence of 24 GeV/c proton radiation on MCz Si p(+)-n(TD)-n(+) detectors is similar to that on p(+)-n-n(+) detectors based on FZ or diffusion oxygenated n-type Si. C1 [Li, Zheng; Verbitskaya, E.; Li, Michael] Brookhaven Natl Lab, Upton, NY 11973 USA. [Verbitskaya, E.; Eremin, V.] Tech Inst Russian Acad Sci, Ioffe Physico, Moscow, Russia. [Haerkoenen, J.] CERN PH, Helsiniki Inst Phys, CH-1211 Geneva, Switzerland. RP Li, Z (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM ZHENGL@BNL.GOV RI Verbitskaya, Elena/D-1521-2014 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2159 EP + DI 10.1109/NSSMIC.2007.4436579 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401185 ER PT S AU Chowdhury, P Lakshmi, S Tandel, SK Wilson, CM Gros, S Lister, CJ Dokhale, P Farell, R McClish, A Shah, KS AF Chowdhury, P. Lakshmi, S. Tandel, S. K. Wilson, C. M. Gros, S. Lister, C. J. Dokhale, P. Farell, R. McClish, A. Shah, K. S. GP IEEE TI Compact, efficient angular correlation measurements with novel, position-sensitive alpha and gamma detectors SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We report on proof-of-principle measurements of alpha-gamma angular correlations in the decay of Ra-224, using a position-sensitive avalanche photo-diode for detecting alpha particles and a planar germanium double-sided strip detector for detecting gamma rays. The excellent position resolutions of both detectors allow close positioning of the radiation source to the detectors, covering a large angular range in a single configuration, thus enhancing efficiency in a compact geometry. C1 [Chowdhury, P.; Lakshmi, S.; Tandel, S. K.; Wilson, C. M.] Univ Massachusetts, Lowell, MA 01854 USA. [Gros, S.; Lister, C. J.] Argonne Natl Lab, Chicago, IL USA. RP Chowdhury, P (reprint author), Univ Massachusetts, Lowell, MA 01854 USA. RI Soundara Pandian, Lakshmi/C-8107-2013; OI Soundara Pandian, Lakshmi/0000-0003-3099-1039; Tandel, Sujit/0000-0003-4784-3139 FU U.S. Department of Energy FX This work was supported in part by the U.S. Department of Energy. NR 4 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2216 EP + DI 10.1109/NSSMIC.2007.4436591 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401197 ER PT S AU Holland, SE Bebek, CJ Daniels, PJ Dawson, KS Emes, JH Groom, DE Jelinksy, SR Karcher, A Kolbe, WF Palaio, NP Tran, CH Roe, NA Wang, G AF Holland, S. E. Bebek, C. J. Daniels, P. J. Dawson, K. S. Emes, J. H. Groom, D. E. Jelinksy, S. R. Karcher, A. Kolbe, W. F. Palaio, N. P. Tran, C. H. Roe, N. A. Wang, G. GP IEEE TI Technology development for 4k x 4k, back-illuminated, fully depleted scientific CCD imagers SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID HIGH-RESISTIVITY SILICON; CHARGE-COUPLED-DEVICES; FABRICATION; DETECTOR; MEGACAM AB We have developed scientific charge-coupled devices (CCDs) that are fabricated on high-resistivity, n-type silicon substrates, and have demonstrated fully depleted operation for substrate thicknesses of 200-675 mu m with formats as large as 2048 x 4096 (15 mu m pixels) and 3512 x 3512 (10.5 mu m pixels). The main application area for these devices is space and ground-based astronomy, and the CCDs are operated at cryogenic temperatures with slow-scan readout for good performance in terms of dark current and noise. In this work we describe the technology development efforts needed to realize a 4k x 4k (15 mu m pixel) CCD with a die area of (64 mm)(2). In particular, we describe improved gettering techniques for low dark current and high charge transfer efficiency that have been developed in order to improve fabrication yields for these very large format CCDs. C1 [Holland, S. E.; Bebek, C. J.; Daniels, P. J.; Dawson, K. S.; Emes, J. H.; Groom, D. E.; Jelinksy, S. R.; Karcher, A.; Kolbe, W. F.; Palaio, N. P.; Tran, C. H.; Roe, N. A.; Wang, G.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Holland, SE (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Roe, Natalie/A-8798-2012; Holland, Stephen/H-7890-2013 NR 19 TC 2 Z9 2 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2220 EP 2225 DI 10.1109/NSSMIC.2007.4436592 PG 6 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401198 ER PT S AU Bell, ZW AF Bell, Z. W. GP IEEE TI Neutron detection via the Cherenkov effect SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have incorporated neutron-absorbing elements in transparent, non-scintillating glasses and used the Cherenkov effect to convert neutron-induced beta-gamma radiation directly into light. Use of the Cherenkov effect requires glasses with a high index of refraction (to lower the threshold and increase the number of Cherenkov photons) and neutron absorbers resulting in radioactive products emitting high-energy beta or gamma radiation. In this paper, we present a brief description of the requirements for developing efficient Cherenkov-based neutron detectors, show the results of measurements of the response of representative samples to a thermal neutron flux, and give the results of a calculation of the expected response of a detector to a moderated fission spectrum. C1 [Bell, Z. W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Bell, ZW (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Boatner, Lynn/I-6428-2013; OI Boatner, Lynn/0000-0002-0235-7594; Bell, Zane/0000-0003-1115-8674 NR 7 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2296 EP 2300 DI 10.1109/NSSMIC.2007.4436604 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401210 ER PT S AU Ramberg, E AF Ramberg, E. GP IEEE TI A broad energy range detector Test Beam Facility at Fermilab SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Meson Test Beam Facility at Fermilab has recently been substantially updated to provide a very broad energy range of particle beams (0.5 to 120 GeV) for detector testing. I outline the capabilities of this facility here. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ramberg, E (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2349 EP 2350 DI 10.1109/NSSMIC.2007.4436616 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401222 ER PT S AU Faccioli, L AF Faccioli, Lorenzo CA SNAP Collaborat GP IEEE TI An example of use of SNAPSim, a software package for simulating Dark Energy missions SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SUPERNOVAE AB We show an example of use of SNAPsim, a software package intended to simulate Dark Energy missions. We point out how our software, though designed with the proposed SNAP mission in mind, can be used for simulating a generic mission; we show this by simulating an ongoing mission. We focus on one of the most important sources of systematic error in such missions: the effect that a zero point filter calibration uncertainty has on the final precision of the cosmological parameters. We show that in the presence of calibration uncertainties a significant reduction in the error of the cosmological parameters can be achieved if all the distance to the Supernovae observed by the mission are fitted simultaneously. C1 [Faccioli, Lorenzo] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Faccioli, L (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2358 EP 2361 DI 10.1109/NSSMIC.2007.4436618 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401224 ER PT S AU WaIder, JP Abiad, R Bebek, CJ Chao, G Gnani, D Karcher, A Krieger, B von der Lippe, H AF WaIder, J. P. Abiad, R. Bebek, C. J. Chao, G. Gnani, D. Karcher, A. Krieger, B. von der Lippe, H. GP IEEE TI A CCD clock controller ASIC using novel design techniques integrated in a CMOS 0.8 mu m SOI high voltage process SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB An ASIC designed to provide the clock signals to the focal plane CCDs for the SNAP satellite project is presented. A prototype has been implemented in a CMOS 0.8 mu m SOI high voltage process in order to accommodate a 20V output swing. The circuit consists of a main charge pump multiplying the 4V power supply voltage +/-16V followed by a controlled current source setting the clock voltage plateaus. A bridge of switches provides the clock voltage transitions at the output. This circuit is designed to operate at room temperature for test purpose and at 140 K, which will be the operating temperature. Novel design techniques used in this chip will be presented in detail along with measurement results obtained on the prototypes. C1 [WaIder, J. P.; Bebek, C. J.; Chao, G.; Gnani, D.; Karcher, A.; Krieger, B.; von der Lippe, H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Abiad, R.] Space Sci Lab, Berkeley, CA 94720 USA. RP WaIder, JP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM jpwalder@lbl.gov RI Gnani, Dario/J-6426-2012 OI Gnani, Dario/0000-0003-0464-9176 FU United States Department of Energy [DE-AC02-05CH11231] FX This work was sponsored by the United States Department of Energy under contract number: No. DE-AC02-05CH11231. NR 4 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2404 EP + PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401233 ER PT S AU Krieger, B Chao, G Grosshans, I Karcher, A Kurz, S Walder, JP AF Krieger, Bradley Chao, George Grosshans, Ingo Karcher, Armin Kurz, Sebastian Walder, Jean-Pierre GP IEEE TI A precision voltage and current reference for the SNAP CCD readout IC SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB A bandgap reference circuit capable of generating precision voltages below the Vg0 of silicon has been fabricated in a 0.25um, 2.5V CMOS process. The circuit described is based on an existing topology that intrinsically generates a temperature compensated reference current, which can then be mirrored to provide both current and voltage references. With regard to bandgap reference design, a major deficiency of most modern sub-micron CMOS processes is the lack of any well-characterized forward-biased junction device. A method of device measurement and parameter extraction is presented that allows for the precise simulation of a fixed diode layout for the temperature range -150 to +70 C. The extracted diode model was used to optimize the bandgap design. Measurements of the prototype IC indicate an initial accuracy of 35mV, a PSRR >60dB, 12-bit noise performance, and a 10mV voltage deviation over a range of more than 150 C degrees. C1 [Krieger, Bradley; Chao, George; Grosshans, Ingo; Karcher, Armin; Kurz, Sebastian; Walder, Jean-Pierre] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Krieger, B (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,Mail Stop 50A-6134, Berkeley, CA 94720 USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2408 EP 2410 DI 10.1109/NSSMIC.2007.4436628 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401234 ER PT S AU De Geronimo, G Fried, J Frost, E Phlips, BF Vernon, E Wulf, EA AF De Geronimo, Gianluigi Fried, Jack Frost, Elliot Phlips, Bernard F. Vernon, Emerson Wulf, Eric A. GP IEEE TI Front-end ASIC for a silicon Compton telescope SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We describe a front-end application specific integrated circuit (ASIC) developed for a silicon Compton telescope. Composed of 32 channels, it reads out signals in both polarities from each side of a Silicon strip sensor, 2 mm thick 27 cm long, characterized by a strip capacitance of 30 pF. Each front-end channel provides low-noise charge amplification, shaping with a stabilized baseline, discrimination, and peak detection with an analog memory. The channels can process events simultaneously, and the read out is sparsified. The charge amplifier makes uses a dual-cascode configuration and dual-polarity adaptive reset. The low-hysteresis discriminator and the multi-phase peak detector process signals with a dynamic range in excess of four hundred. An equivalent noise charge (ENC) below 200 electrons was measured at 30 pF, with a slope of about 4.5 electrons / pF at a peaking time of 4 mu s. With a total dissipated power of 5 mW the channel covers an energy range up to 3.2 MeV. C1 [De Geronimo, Gianluigi; Fried, Jack; Vernon, Emerson] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. [Frost, Elliot] Praxis Inc, Alexandria, VA 22303 USA. [Phlips, Bernard F.; Wulf, Eric A.] Naval Res Lab, High Energy Space Environm Branch, Washington, DC 20375 USA. RP De Geronimo, G (reprint author), Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. EM degeronimo@bnl.gov RI Wulf, Eric/B-1240-2012 FU Domestic Nuclear Detection Office (DNDO); U.S. Department of Homeland Security FX Manuscript received November 8, 2007; revised May 14, 2008. Current version published September 19, 2008. This work was supported in part by the Domestic Nuclear Detection Office (DNDO) of the U.S. Department of Homeland Security NR 13 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2411 EP + DI 10.1109/NSSMIC.2007.4436629 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401235 ER PT S AU Bagnaia, P Cirilli, M Celio, P Dirnitrov, G Mckee, S Orestano, D Rothberg, J Viegas, FTA Verducci, M Vilucchi, E AF Bagnaia, Paolo Cirilli, Manuela Celio, Paola Dirnitrov, Gancho Mckee, Shawn Orestano, Dornizia Rothberg, Joe Viegas, Florbela Tique Aires Verducci, Monica Vilucchi, Elisabetta GP IEEE TI Database architecture for the calibration of ATLAS Monitored Drift Tube chambers SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Experiments at the CERN Large Hadron Collider (LHC) raise unprecedented challenges not only in terms of detector design, construction and operation, but also in terms of software models and data persistency. One of the more challenging tasks is the calibration of the 375000 Monitored Drift Tubes used for precision tracking in the Muon Spectrometer of the ATLAS experiment. Data suitable for MDT calibration will be extracted from the second level trigger and then streamed to three remote Tier-2 Calibration Centres. At each centre, the computation of the actual calibration constants will be performed in several steps, including strict validation and data quality checks. All information produced at every stage of the calibration procedure will be stored in local ORACLE Calibration databases that will be replicated to a central database located at CERN using ORACLE streams. The validated calibration constants will be extracted from the CERN Calibration DB and stored into the ATLAS Conditions database for subsequent use in reconstruction and data analysis. Calibration sites will also need to access the ATLAS conditions data that are relevant for the calculation of MDT calibrations: part of the Conditions Database will thus be replicated at the remote sites via ORACLE streams. This paper reviews the complex chain of databases envisaged to support the MDT Calibration and describes the actual status of the implementation and of the tests that are being performed to ensure a smooth operation at the LHC start-up in 2008. C1 [Bagnaia, Paolo; Celio, Paola; Orestano, Dornizia] Univ Roma La Sapienza, Ist Nazl Fis Nucl Sezione Roma, I-00185 Rome, Italy. [Cirilli, Manuela; Mckee, Shawn] Univ Michigan, Ann Arbor, MI 48109 USA. [Dirnitrov, Gancho] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Rothberg, Joe] Univ Washington, Seattle, WA 98195 USA. [Viegas, Florbela Tique Aires] CERN, Geneva 1211, Switzerland. [Verducci, Monica] CERN, CNAF, Bologna, Italy. [Vilucchi, Elisabetta] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. RP Bagnaia, P (reprint author), Univ Roma La Sapienza, Ist Nazl Fis Nucl Sezione Roma, I-00185 Rome, Italy. EM paolo.bagnaia@romal.infn.it RI McKee, Shawn/B-6435-2012 OI McKee, Shawn/0000-0002-4551-4502 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2447 EP + DI 10.1109/NSSMIC.2007.4436652 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401242 ER PT S AU McIlwain, ME Gao, D Thompson, N AF McIlwain, Michael E. Gao, Da Thompson, Nick GP IEEE TI First principle quantum description of the energetics associated with LaBr3, LaCl3, and Ce doped scintillators SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SELF-TRAPPED EXCITON; ENERGY-RESOLUTION SCINTILLATOR; MANY-ELECTRON SYSTEMS; OPTICAL-ABSORPTION; TEMPERATURE; RELAXATION; MOLECULES; DYNAMICS; HALIDES; LU AB Considerable interest is given to the excellent scintillation properties of cerium doped lanthanum chloride (LaCl3) and lanthanum bromide (LaBr3). The scintillation efficiencies are much greater than other materials, even those containing cerium. This high efficiency is attributed to the high mobility of electrons and holes, unique placement of the cerium 5d states within the band gap, and energy of the band gap. To better understand the scintillation process and better define the nature of the Self Trapped Exciton (STE) within these unique scintillation materials, density functional theory (DFT), and Ab-inito (HF-MP2) calculations are reported. DFT calculations have yielded a qualitative description of the orbital composition and energy distribution of the band structure in the crystalline material. MP2 and single configuration interaction calculations have provided quantitative values for the band gap and provided energies for the possible range of excited states created following hole and electron creation. Based on this theoretical treatment, one possible description of the STE is the combination of V-k center (Br-2(-1)) and LaBr+1 species that recombine to form a distorted geometry LaBr3* (triplet state). Depending on the distance between the LaBr and Br-2, the STE emission band can be reproduced. C1 [McIlwain, Michael E.; Thompson, Nick] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Gao, Da] Washington State Univ, Pullman, WA 99164 USA. RP McIlwain, ME (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Michael.Mcllwain@inl.gov; Da.Gao@inl.gov; Nick.Thompson@inl.gov FU U. S. Department of Energy; Office of Biological and Environmental Research; Environmental Research Science Program [DE AC07-05ID141517] FX This work was supported by the U. S. Department of Energy, Office of Biological and Environmental Research, Environmental Research Science Program under Contract No. DE AC07-05ID141517. NR 29 TC 0 Z9 0 U1 0 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2460 EP + DI 10.1109/NSSMIC.2007.4436654 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401244 ER PT S AU Canning, A Chaudhry, A Wang, LW Boutchko, R Derenzo, SE Weber, MJ AF Canning, Andrew Chaudhry, Anurag Wang, Lin-Wang Boutchko, Rostyslav Derenzo, Stephen E. Weber, Marv J. GP IEEE TI ELectronic structure studies and predictions for new Ce-doped gamma detector materials SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB We have developed a theoretical approach based on first-principles calculations to select candidate Cc activated scintillator materials for synthesis. Our theoretical approach involves the calculation of the groundstate bandstructure of the Ce doped material as well as the calculation of the (Ce3+)* excited state. From our theoretical studies of known scintillators and non-scintillators we have developed a set of criteria that characterize bright Ce activated scintillators. Applying these criteria to new compounds we were able to successfully predict that Ba2YCI7:Ce would be a bright scintillator. C1 [Canning, Andrew; Wang, Lin-Wang] Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. [Chaudhry, Anurag; Boutchko, Rostyslav; Derenzo, Stephen E.; Weber, Marv J.] Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Canning, A (reprint author), Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. EM acanning@lbl.gov FU Homeland Security FX This work was supported by the Department of Homeland Security NR 6 TC 2 Z9 2 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2466 EP + DI 10.1109/NSSMIC.2007.4436655 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401245 ER PT S AU Junnarkar, SS Mitra, S Fontaine, R AF Junnarkar, Sachin S. Mitra, Sudeep Fontaine, Rejean GP IEEE TI FPGA based field deployable instrumentation system for neutron time of flight sub nanosecond coincidence spectroscopy SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID TO-DIGITAL CONVERTER; DELAY-LINE C1 [Junnarkar, Sachin S.; Mitra, Sudeep] Brookhaven Natl Lab, Upton, NY 11973 USA. [Fontaine, Rejean] Univ Sherbrooke, Sherbrooke, PQ, Canada. RP Junnarkar, SS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM sachin@bnl.gov NR 13 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2513 EP + DI 10.1109/NSSMIC.2007.4436664 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401254 ER PT S AU Ianakiev, KD Alexandrov, B Moss, CE Nguyen, H Williams, RB AF Ianakiev, K. D. Alexandrov, B. Moss, C. E. Nguyen, H. Williams, R. B. GP IEEE TI Neutron and gamma discrimination by compensation of long components in liquid scintillators SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID PULSE-SHAPE DISCRIMINATION AB A technique for eliminating the long component for gamma pulse response in liquid scintillators has been developed The analytical relationships between the values of the electrical components and the light response, approximated with two and three exponential components, have been derived A simple reset preamplifier was built for acquiring and digitizing the charge pulse information. The neutron charge pubes have been measured at a time scale of 50 mu s. The existence of a very long time-scale component (tens of microseconds) has been demonstrated for neutron pulses. An analysis of experimental data for pulse-shape discrimination is presented. C1 [Ianakiev, K. D.; Alexandrov, B.; Moss, C. E.; Nguyen, H.; Williams, R. B.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ianakiev, KD (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Alexandrov, Boian/D-2488-2010 OI Alexandrov, Boian/0000-0001-8636-4603 NR 5 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2522 EP 2525 DI 10.1109/NSSMIC.2007.4436666 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401256 ER PT S AU Bandstra, ME Bellm, E Boggs, SE Bowen, JD Perez-Becker, D Wunderer, CB Zoglauer, A Amman, M Luke, PN Chang, HK Chin, JL Liang, JS Chang, YH Liu, ZK Lin, CH Huang, MA Jean, P AF Bandstra, Mark E. Bellm, Eric Boggs, Steven E. Bowen, Jason D. Perez-Becker, Daniel Wunderer, Cornelia B. Zoglauer, Andreas Amman, Mark Luke, Paul N. Chang, Hsiang-Kuang Chin, Jeng-Lun Liang, Jau-Shian Chang, Yuan-Hann Liu, Zong-Kai Lin, Chih-Hsun Huang, Minghuey A. Jean, Pierre GP IEEE TI The upcoming long duration balloon flight of the Nuclear Compton Telescope SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID STRIP DETECTOR; NCT AB The Nuclear Compton Telescope (NCT) is a balloon-borne soft gamma-ray (0.2 MeV-10 MeV) telescope designed to study astrophysical sources of nuclear line emission and polarization. A prototype instrument was successfully launched from Fort Sumner, New Mexico on June 1, 2005. The NCT prototype consisted of two 3D position sensitive high-purity germanium strip detectors (GeDs) fabricated with amorphous Ge contacts. We are currently working toward two balloon flights: another conventional balloon flight from Fort Sumner, New Mexico in September 2008, and a long-duration balloon flight (LDBF) from Alice Springs, Australia in December 2009. The NCT instrument is being upgraded to include all twelve planned GeDs. The electronics for all twelve detectors have been redesigned for smaller size, lower power consumption, and lower noise, and are now being fabricated and tested. Here we present our current progress in preparing for the flights. C1 [Bandstra, Mark E.; Bellm, Eric; Boggs, Steven E.; Bowen, Jason D.; Perez-Becker, Daniel; Wunderer, Cornelia B.; Zoglauer, Andreas] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Amman, Mark; Luke, Paul N.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. [Chang, Hsiang-Kuang; Chin, Jeng-Lun; Liang, Jau-Shian] Natl Tsing Hua Univ, Hualien, Taiwan. [Chang, Yuan-Hann; Liu, Zong-Kai] Natl Cent Univ, Taoyuan, Taiwan. [Lin, Chih-Hsun] NSPO, Hsinchu, Taiwan. [Huang, Minghuey A.] Natl United Univ, Miaoli 36003, Taiwan. [Jean, Pierre] CESR, Toulouse, France. RP Bandstra, ME (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. EM bandstra@ssl.berkeley.edu RI Boggs, Steven/E-4170-2015 OI Boggs, Steven/0000-0001-9567-4224 FU NASA [NNG04WC38G]; National Space Organization (NSPO) in Taiwan [96-NSPO(B)-SP-FA04-01] FX The NCT project is funded by NASA under Grant #NNG04WC38G for the NCT-US team and by the National Space Organization (NSPO) in Taiwan under Grant 96-NSPO(B)-SP-FA04-01 for the NCT-Taiwan team. NR 19 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2532 EP + DI 10.1109/NSSMIC.2007.4436668 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401258 ER PT S AU Mizuno, T Arimoto, M Axelsson, M Bjornsson, CI Bogaert, G Carlson, P Craig, W Fukazawa, Y Gunji, S Hjalmarsdotter, L Kamae, T Kanai, Y Kataoka, J Katsuta, J Kawai, N Kiss, M Klamra, W Larsson, S Madejski, G Bettolo, CM Pearce, JNM Ryde, F Tajima, H Takahashi, H Tanaka, T Thurston, T Ueno, M Varner, G Yoshida, H AF Mizuno, T. Arimoto, M. Axelsson, M. Bjornsson, C. -I. Bogaert, G. Carlson, P. Craig, W. Fukazawa, Y. Gunji, S. Hjalmarsdotter, L. Kamae, T. Kanai, Y. Kataoka, J. Katsuta, J. Kawai, N. Kiss, M. Klamra, W. Larsson, S. Madejski, G. Bettolo, C. Marini Pearce, J. Ng M. Ryde, F. Tajima, H. Takahashi, H. Tanaka, T. Thurston, T. Ueno, M. Varner, G. Yoshida, H. GP IEEE TI High sensitivity balloon-borne hard X-ray/soft gamma-ray polarimeter PoGOLite SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID CRAB-NEBULA; EGS4 CODE; BEAM TEST; POLARIZATION; PULSAR; ASTRONOMY; IMPLEMENTATION; CALIBRATION; SCATTERING; RADIATION AB The Polarized Gamma-ray Observer - Lightweight Version (PoGOLite) is a new balloon experiment capable of detecting 10% polarization from a 200 mCrab source in the 25-80 keV energy range in a single 6-hour flight for the first time. Polarization measurements of hard X-rays and soft gamma-rays are expected to provide a powerful probe into high-energy emission mechanisms as well as source geometries. PoGOLite uses Compton scattering and photo-absorption to measure polarization in an array of 217 well-type phoswich detector cells made of plastic and BGO scintillators. The adoption of a well-type phoswich counter concept and a thick polyethylene neutron shield provides a narrow field-of-view (1.25 msr), a large effective area ( >= 250 cm(2) at 40-50 keV), a high modulation factor (more than 25 %) and the low background (- 100 mCrab) required to conduct high-sensitivity polarization measurements. Through tests in laboratories and accelerator facilities of a scaled-down prototype with the front-end electronics of flight design and an extensive study by Monte-Carlo simulation, we have demonstrated high instrument performance. PoGOLite Will be ready for a first engineering flight in 2009 and a science flight in 2010, during which polarization signals from the Crab Nebula/pulsar, Cygnus X-1 and other objects will be observed. C1 [Mizuno, T.; Fukazawa, Y.; Takahashi, H.; Tanaka, T.; Yoshida, H.] Hiroshima Univ, Hiroshima 7398526, Japan. [Arimoto, M.; Kanai, Y.; Kataoka, J.; Kawai, N.; Ueno, M.] Tokyo Inst Technol, Tokyo 152, Japan. [Axelsson, M.; Bjornsson, C. -I.; Hjalmarsdotter, L.; Larsson, S.] Stockholm Univ, SE-10691 Stockholm, Sweden. [Bogaert, G.] Ecole Polytech, F-91128 Palaiseau, France. [Carlson, P.; Kiss, M.; Klamra, W.; Bettolo, C. Marini; Pearce, J. Ng M.; Ryde, F.] Royal Inst Technol, SE-10691 Stockholm, Sweden. [Craig, W.] Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 USA. [Gunji, S.] Yamagata Univ, Yamagata 990, Japan. [Kamae, T.; Madejski, G.; Pearce, J. Ng M.; Tajima, H.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. [Katsuta, J.; Takahashi, H.] Inst Space & Astronaut Sci, JAXA, Kanagawa 229, Japan. [Thurston, T.] Thuston Co Seattle, Seattle, WA 98125 USA. [Varner, G.] Univ Hawaii, Honolulu, HI 96822 USA. RP Mizuno, T (reprint author), Hiroshima Univ, Hiroshima 7398526, Japan. EM mizuno@hep01.hepl.hiroshima-u.ac.jp NR 44 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2538 EP + DI 10.1109/NSSMIC.2007.4436669 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380401259 ER PT S AU Boutchko, R Balakrishnan, K Reutter, BW Gullberg, GT AF Boutchko, Rostyslav Balakrishnan, Karthikayan Reutter, Bryan W. Gullberg, Grant T. GP IEEE TI Patient motion correction in computed tomography by reconstruction on a moving grid SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB This work describes a method of motion correction in image reconstruction for both emission computed tomography and X-ray CT. The method assumes that moving objects are represented as objects of constant intensity defined on a deformable grid. Large-scale body motion and respiratory motion are tracked by fiducial markers attached to the patient's body. The positions of the markers are determined using a camcorder-based system. The deformation of the body is approximated by local shifts in the grid nodes of the image representation, which are linear functions of the time-dependent displacement of the fiducial markers. After the grid motion is established, node intensities are reconstructed using either an analytical or an iterative statistical reconstruction algorithm. The information about the grid deformation is incorporated during the computation of the forward projection. Both analytical and iterative ML-EM algorithms are inplemented without a significant increase in reconstruction time. Numerical experiments are presented in a two-dimensional case for a simulated CT scan of a deformable phantom and in a three-dimensional case for the NCAT phantom with respiratory motion. C1 [Boutchko, Rostyslav; Reutter, Bryan W.; Gullberg, Grant T.] Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Balakrishnan, Karthikayan] Philips Med Syst, Cleveland, OH 44102 USA. RP Boutchko, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM RBuchko@lbl.gov FU National Institutes of Health (NIH) [R01-HL50663]; U.S. Department of Energy [DE-AC03-76SF00098.] FX Manuscript received November 20, 2007. This work was supported in part by grant R01-HL50663 from the National Institutes of Health (NIH) and the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. NR 1 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2705 EP + DI 10.1109/NSSMIC.2007.4436702 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402032 ER PT S AU Popov, V Majewski, S Proffitt, J McKisson, J Kross, B Weisenberger, A AF Popov, Vladimir Majewski, Stan Proffitt, James McKisson, John Kross, Brian Weisenberger, Andrew GP IEEE TI Study of photonis XP1470 nine-channel photomultiplier tube for applications in high resolution single gamma and PET imagers SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Performance of a new XP1470 nine-channel photomultiplier tube was studied for economical yet high resolution single gamma and PET imaging applications. Four samples of this PMT were tested using two different front-end readout schemes. Spatial and time resolution performance of 1x2 and 2x2 array configurations of these PMTs were studied with 2mm and 3mm pixellated LYSO and NaI(TI) crystal arrays with 122 keV and 511 keV gamma rays. With optimized light spreader, good pixel separation and good energy resolution were achieved in a small similar to 10x10cm(2) active FOV PET or single gamma detector module prototype. C1 [Popov, Vladimir; Majewski, Stan; Proffitt, James; McKisson, John; Kross, Brian; Weisenberger, Andrew] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Popov, V (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2870 EP 2874 DI 10.1109/NSSMIC.2007.4436734 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402064 ER PT S AU Goddard, JS Baba, JS Weisenberger, AG Smith, MF AF Goddard, James S. Baba, Justin S. Weisenberger, Andrew G. Smith, Mark F. GP IEEE TI Improved pose measurement and tracking system for motion correction of awake, unrestrained small animal SPECT imaging SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB An improved optical landmark-based pose measurement and tracking system has been developed to provide 3D animal pose data for a single photon emission computed tomography (SPECT) imaging system for awake, unanesthetized, unrestrained laboratory animals. The six degree of freedom animal position and orientation measurement data are time synchronized with the SPECT list mode data to provide for motion correction after the scan and before reconstruction. The tracking system employs infrared (IR) markers placed on the animal's head along with synchronized, strobed IR LEDs to illuminate the reflectors and freeze motion while minimizing reflections. A new design trinocular stereo image acquisition system using IEEE 1394 CMOS cameras acquires images of the animal with markers contained within a transparent enclosure. The trinocular configuration provides improved accuracy, range of motion, and robustness over the binocular stereo previously used. Enhanced software detects obstructions, automatically segments the markers, rejects reflections, performs marker correspondence, and calculates the 3D pose of the animal's head using image data from three cameras. The new hardware design provides more compact camera positioning with enhanced animal viewing through the 360 degree SPECT scan. This system has been implemented on a commercial gantry and tested using live mice and has been shown to be more reliable with higher accuracy than the previous system. Experimental results showing the improved motion tracking results are given. C1 [Goddard, James S.; Baba, Justin S.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Weisenberger, Andrew G.] Jefferson Lab, Newport News, VA USA. [Smith, Mark F.] Univ Maryland, Baltimore, MD 21201 USA. RP Goddard, JS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM goddardjsjr@ornl.gov; drew@jlab.org; msrmth7@urmn.edu FU Oak Ridge National Laboratory, Oak Ridge, Tennessee [37831-6285]; LLC for the U.S. Department of Energy [DE-AC05-00OR22725] FX This paper was prepared by the Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6285, operated by UT-Battelle, LLC for the U.S. Department of Energy under contract DE-AC05-00OR22725. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2937 EP + DI 10.1109/NSSMIC.2007.4436749 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402079 ER PT S AU Huber, JS Peng, Q Moses, WW AF Huber, J. S. Peng, Q. Moses, W. W. GP IEEE TI Multi-modality phantom development SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID ACOUSTIC PROPERTIES; MIMICKING AB Multi-modality imaging has an increasing role in the diagnosis and treatment of a large number of diseases, particularly if both functional and anatomical information are acquired and accurately co-registered. Although PET-CT has recently revolutionized the role of imaging for many kinds of cancer, ultrasound is the preferred imaging technology for many diseases such as prostate cancer. Transrectal ultrasound (TRUS) is an integral part of diagnosis and treatment for prostate cancer, so we are developing a dual imaging system that will acquire PET and TRUS data during the same patient imaging session and accurately co-register the images. In order to validate our methods prior to patient imaging, we will use a novel custom PET-TRUS prostate phantom. We present our initial PET-ultrasound phantom development, including PET and ultrasound images of a simple phantom, as well as discuss of our future phantom construction plans. We will use agar-gelatin tissue mimicking materials mixed with radioactive water solutions. Although we are currently focused on prostate imaging, this phantom development is applicable to all PET-ultrasound imaging applications. In addition, we discuss how to make a PET-ultrasound phantom also MRI and/or CT compatible. C1 [Huber, J. S.; Peng, Q.; Moses, W. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Huber, JS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI peng, qiyu/G-1586-2013 NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 2944 EP 2948 DI 10.1109/NSSMIC.2007.4436751 PG 5 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402081 ER PT S AU Schyler, D Vaska, P Tomasi, D Woody, C Maramraju, SH Southekal, S Pratte, JF Junnarkar, S Solis-Najera, S Krishnamoorthy, S Kriplani, A Stoll, S AF Schyler, D. Vaska, P. Tomasi, D. Woody, C. Maramraju, S-H Southekal, S. Pratte, J-F Junnarkar, S. Solis-Najera, S. Krishnamoorthy, S. Kriplani, A. Stoll, S. GP IEEE TI A simultaneous PET/MRI scanner based on RatCAP in small animals SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID SIMULTANEOUS PET; DETECTOR AB The ability to acquire high resolution anatomical data as well as quantitative functional information in vivo is becoming an increasingly important factor in the diagnosis of disease. Simultaneous acquisition of PET and MRI data would provide essentially perfect co-registration between the two images which is particularly important for tissues whose position and shape can change between sequential scans. RatCAP is a complete 3D tomograph that is designed to image the brain of an awake rat. A special MRI coil composed of 2 saddle elements working in quadrature mode was mounted on a Delrin cylinder specifically designed to fit inside the RatCAP but allowing the rat's head to be placed inside as well. Simultaneous PET/MRI images of the rat brain have been acquired in a 4T MRI scanner using the RatCAP detector, with minimal effect on MRI images. C1 [Schyler, D.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Maramraju, S-H; Southekal, S.; Krishnamoorthy, S.; Kriplani, A.] SUNY Stony Brook, Biomed Engn dept, Stony Brook, NY USA. RP Schyler, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM schlyer@bnl.gov RI Tomasi, Dardo/J-2127-2015 FU U.S. Department of Energy (OBER) [DE-AC02-98CH10886] FX The authors would like to thank Daniela Schulz and Vinal Patel for providing and handling animals in this study, David Alexoff for assistance in radiotracer administration in animals and Ruiliang Wang for technical assistance in running MRI sequences. This work was supported by the U.S. Department of Energy (OBER) under Prime Contract No. DE-AC02-98CH10886. NR 16 TC 0 Z9 0 U1 2 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3256 EP + DI 10.1109/NSSMIC.2007.4436833 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402147 ER PT S AU Qian, JG Blue, RE Bradley, EL Majewski, S Saba, MS Schworer, S Smith, MF Weisenberger, AG Welsh, RE AF Qian, Jianguo Blue, R. Eric Bradley, Eric L. Majewski, Stan Saba, Margaret S. Schworer, Stephen Smith, Mark F. Weisenberger, Andrew G. Welsh, Robert E. GP IEEE TI In vivo multipinhole helical SPECT of a mouse thyroid SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE single photon emission computed tomography (SPECT); multipinhole; helical; small animal imaging ID SODIUM-IODIDE SYMPORTER; SMALL ANIMAL SPECT; SMALL LABORATORY-ANIMALS; PINHOLE SPECT; GAMMA-CAMERA; PERFORMANCE EVALUATION; EMISSION-TOMOGRAPHY; GRAVES-DISEASE; RESOLUTION; SYSTEM AB Radioiodine imaging using I-125 for single photon emission computed tomography (SPECT) is particularly suitable for studies of the mouse thyroid gland based upon the ability to detect and track emitted gamma radiation. However, the resolution available with parallel-hole SPECT limits the extraction of fine detail in the bilobal structure of a mouse thyroid gland. Though high-resolution single-pinhole imaging is a promising tool, high administered radioactivity is usually required in order to compensate for its low sensitivity without compromising the quality of image reconstruction. Consequentially one must consider the potential high-dose effects on small animals such as mice. Herein we applied multipinhole helical SPECT to address the issues related to in vivo imaging of the mouse thyroid. We have carried out "proof-of-concept" studies using both phantoms and mice and further validated the efficacy of multipinhole helical SPECT by monitoring molecular expression of a transmembrane ion channel called the sodium iodide symporter (NIS) responsible for I-125 metabolism. In vivo two-pinhole helical SPECT of the mouse thyroid has been successfully achieved with a dose of 200 mu Ci (NaI)-I-125. The reconstructed images clearly delineated the bilobal structure of the thyroid region. Complementary results from immunohistochemistry and reverse transcriptase polymerase chain reaction (RT-PCR) verified that radioiodine incorporation in the thyroid gland reflects NIS expression. The present studies demonstrate that multipinhole helical SPECT is suitable for in vivo analysis of the mouse thyroid at the molecular level, suggesting potential molecular imaging applications for a variety of biological studies of NIS-expressing tissues in mice such as stomach or mammary tumors. C1 [Qian, Jianguo] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA. [Blue, R. Eric; Bradley, Eric L.; Saba, Margaret S.; Schworer, Stephen] Coll William & Mary, Dept Biol, Williamsburg, VA 23187 USA. [Welsh, Robert E.] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. [Smith, Mark F.] Univ Maryland, Dept Diagnost Radiol, Baltimore, MD 21201 USA. [Majewski, Stan; Weisenberger, Andrew G.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Qian, JG (reprint author), Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA. EM elbrad@wm.edu; welsh@www-hep.physics.wm.edu RI Qian, Jianguo/B-3663-2010 FU U. S. Department of Energy; U. S. NIH-NIBIB [1 R15 EB000458-02]; U. S. Department of Defense Breast Cancer Research Program [BC046053] FX We are grateful to Dr. Steven Meikle for making available his code for part of the reconstruction work. This work was supported by the U. S. Department of Energy and the U. S. NIH-NIBIB under Grant 1 R15 EB000458-02 and by the U. S. Department of Defense Breast Cancer Research Program under Grant BC046053. NR 36 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3376 EP + DI 10.1109/NSSMIC.2007.4436856 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402170 ER PT S AU Sidky, EY Chartrand, R Pan, XC AF Sidky, Emil Y. Chartrand, Rick Pan, Xiaochuan GP IEEE TI Image reconstruction from few views by non-convex optimization SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Image reconstruction for fan-beam computed tomography (CT) from projection data containing a small number of views is investigated. An iterative algorithm is developed that seeks to minimize the total p-variation of the reconstructed image subject to the constraint that the estimated projection data agree with the available data to within a specified data tolerance epsilon. A preliminary investigation on the dependence of image quality as a function of p and epsilon is performed. C1 [Sidky, Emil Y.; Pan, Xiaochuan] Univ Chicago, Dept Radiol, MC 2026,5841 S Maryland Ave, Chicago, IL 60637 USA. [Chartrand, Rick] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Sidky, EY (reprint author), Univ Chicago, Dept Radiol, MC 2026,5841 S Maryland Ave, Chicago, IL 60637 USA. OI Chartrand, Rick/0000-0003-3256-2238 NR 5 TC 20 Z9 21 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3526 EP + DI 10.1109/NSSMIC.2007.4436889 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402203 ER PT S AU McKisson, JE Hammond, B Proffitt, J Weisenberger, AG Smit, M AF McKisson, J. E. Hammond, . B. Proffitt, J. Weisenberger, A. G. Smit, M. F. GP IEEE TI A Java distributed acquisition system for PET and SPECT imaging SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Detector and Imaging Group at Jefferson Lab is developing various compact gamma cameras for clinical and preclinical systems. Both PET and SPECT systems are under development. To facilitate that development we have designed a highly flexible Java data acquisition tool that helps to minimize software induced dead-time while maintaining the highest possible data rates from our in house built ADCs. This tool interfaces with FPGA based multi-channel ADCs which our group has developed. Using this tool we are able to process data from a number of different detector types such as the SPECT Awake Animal Imaging system at Johns Hopkins University; as well as our PET systems at West Virginia University (WVU), the University of Florida (UF), and the National Technical University of Athens. Because of the inherent flexibility of our processing software, we are also able adjust detector readout parameters during operation to provide the best possible data presentation and calibration parameters. We are using the readout capability of this software with Kmax to provide a user friendly display of detector outputs such as raw images and individual channel spectra. To accommodate the high rate nature of PET detector systems we designed this software to be scalable across an Ethernet network as well as for multi-cpu computer systems, and it also has the capability to synchronize many ADCs connected to multiple computers. We have incorporated this distributed design into the six computer PEM (Positron Emission Mammography)/PET system at WVU, and the three computer Cardiac PET detector at UF. C1 [McKisson, J. E.; Proffitt, J.; Weisenberger, A. G.] Jefferson Lab, Newport News, VA USA. [Smit, M. F.] Univ Maryland, Baltimore, MD USA. [Hammond, . B.] Univ Florida, Gainesville, FL USA. RP McKisson, JE (reprint author), Jefferson Lab, Newport News, VA USA. EM mckisson@jlab.org; whammond@gmail.com FU efferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the United States Department of Energy [DE-AC05-06OR23177]; DOE Office of Biological and Environmental Research and from the DOE Office of Nuclear Physics FX The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the United States Department of Energy under contract DE-AC05-06OR23177. Support for this research came in part from the DOE Office of Biological and Environmental Research and from the DOE Office of Nuclear Physics NR 3 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3591 EP + DI 10.1109/NSSMIC.2007.4436901 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402215 ER PT S AU Weisenberger, AG Majewski, S Gilland, D Hammond, W Kross, B Popov, V Proffitt, J McKisson, J Smith, MF AF Weisenberger, A. G. Majewski, S. Gilland, D. Hammond, W. Kross, B. Popov, V. Proffitt, J. McKisson, J. Smith, M. F. GP IEEE TI Implementation of a mobile cardiac PET imager for the emergency room and intensive care unit SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Often emergency room and intensive care unit patients are in a condition too critical to be safely moved to a hospital's nuclear medicine suite to assess their cardiac function. To address this need we have built an economically practical mobile cardiac PET based imager for use in an intensive care/emergency room environment. The system is based on a pair of low profile 25 cm x 25 cm detector heads. Each head is structured in a modular fashion in that it utilizes an array of position sensitive photomultiplier tubes (PSPMTs) coupled to a NaI(Tl) crystal array. Sixteen Burle 85002-800 micro-channel plate-based PSPMTs are arranged to form each detector head resulting in a 25 cm x 25 cm field of view. The Nal(TI) scintillating crystal array for each detector head is composed of 5 mm x 5 mm x 12.5 mm crystal elements spaced at a 5.5 mm step. The modular readout architecture has achieved over 100 kHz coincidence trigger rate. The system is now installed at Shands Hospital at the University of Florida and is undergoing phantom tests in anticipation of future clinical trials. C1 [Weisenberger, A. G.; Majewski, S.; Kross, B.; Popov, V.; Proffitt, J.; McKisson, J.] Jefferson Lab, Newport News, VA USA. [Smith, M. F.] Univ Maryland, Baltimore, MD 21228 USA. [Gilland, D.; Hammond, W.] Univ Florida, Gainesville, FL 32611 USA. RP Weisenberger, AG (reprint author), Jefferson Lab, Newport News, VA USA. EM drew@jlab.org; gilland@ufl.edu; msmith7@umm.edu FU United States Department of Energy [DE-AC05-06OR23177]; United States Army Medical Research and Materiel Command [W81XWH-04-1-0594]; DOE Office of Biological and Environmental Research and from the DOE Office of Nuclear Physics FX Manuscript received October 26, 2007. The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the United States Department of Energy under contract DE-AC05-06OR23177. Support for this research came from the United States Army Medical Research and Materiel Command under Award No. W81XWH-04-1-0594, the DOE Office of Biological and Environmental Research and from the DOE Office of Nuclear Physics. NR 9 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3705 EP + DI 10.1109/NSSMIC.2007.4436926 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402240 ER PT S AU Vaska, P Dragone, A Lee, W Kim, DH Pratte, JF Cui, YG Fried, J Krishnamoorthy, S Bolotnikov, A Park, SJ O'Connor, P Dilmanian, FA James, RB AF Vaska, P. Dragone, A. Lee, W. Kim, D. -H. Pratte, J. -F. Cui, Y. -G. Fried, J. Krishnamoorthy, S. Bolotnikov, A. Park, S. -J. O'Connor, P. Dilmanian, F. A. James, R. B. GP IEEE TI A prototype CZT-based PET scanner for high resolution mouse brain imaging SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB One of the most challenging and potentially rewarding research applications of PET is imaging of the mouse brain. Although very high spatial resolution is required (< similar to 1 mm), there is a much wider variety of transgenic models tin mouse compared to the rat. The solid state material CdZnTe (CZT) has long held promise for high resolution PET. Compared to scintillators, its limitations in time resolution and sensitivity can in some ways be compensated by its extremely high spatial and energy resolution, its compact geometry, and by sophisticated data processing techniques. Using such techniques, a time resolution of similar to 10 ns has been demonstrated for similar to 1 cm thick CZT pixel detectors, and this may be sufficient for mouse studies. The depth-of-interaction capability and high energy resolution can improve sensitivity by allowing detectors to be placed very close to the subject and by enabling both reconstruction of detector-scattered events and rejection of object-scattered events. A full-ring prototype scanner has been designed to demonstrate feasibility of the concept, consisting of 6 CZT pixel detectors in a novel geometry. The design of the detector, front-end electronics components, and data acquisition are presented, along with performance characterization of the custom-manufactured CZT detectors. C1 [Vaska, P.; Dragone, A.; Lee, W.; Kim, D. -H.; Pratte, J. -F.; Cui, Y. -G.; Fried, J.; Krishnamoorthy, S.; Bolotnikov, A.; Park, S. -J.; O'Connor, P.; Dilmanian, F. A.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Vaska, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 4 TC 10 Z9 10 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 3816 EP 3819 DI 10.1109/NSSMIC.2007.4436952 PG 4 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380402266 ER PT S AU Judy, PG Welch, B Saviour, TS Kieper, D Majewski, S McKisson, J Kross, B Proffitt, J Stolin, A More, MJ Dinion, NL Williams, MB AF Judy, Patricia G. Welch, Benjamin Saviour, Torre St. Kieper, Doug Majewski, Stan McKisson, John Kross, Brian Proffitt, James Stolin, Alexander More, Mitali J. Dinion, Nicole L. Williams, Mark B. GP IEEE TI Molecular breast imaging with directly opposing compact gamma cameras SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The goal of this study was to evaluate the efficacy of operating a two-head gamma camera system in a configuration in which the two cameras are positioned on opposite sides of the compressed breast, aligned precisely with each other and with precisely anti-parallel viewing directions. The main objective of the present study was to determine if the combination of the two resulting images might allow for better sensitivity for small lesions in all regions of the breast. Two pairs of gamma cameras were evaluated; one composed of commercially available gamma cameras and the other composed of two research-based gamma cameras. For each pair, an acrylic box phantom, with two spherical lesions suspended inside, was used to evaluate contrast and SNR as a function of lesion position, first for images from the two cameras separately and then for images obtained from pixel-by pixel multiplication or summation of the individual images. A capillary phantom was used to quantify the spatial resolution as a function of lesion depth for the cameras individually as well as for the resulting multiplied images. Lastly, gelatin phantoms were imaged, each containing a single cube-shaped lesion of similar to 8 mm side length positioned at varying depths within the phantom. Relative to the single camera images or the summed images, the lesion contrast and SNR of the multiplication image were superior, irrespective of lesion depth, and were much more constant with changing lesion depth. Except when the lesion was less than a centimeter from one of the cameras, the SNR of the multiplied image exceeded that of a single camera image obtained using twice the acquisition time. These findings suggest that improved lesion detectability is possible by imaging simultaneously from both sides of the breast, especially if the location of the lesion within the breast is not known a priori. C1 [Judy, Patricia G.; More, Mitali J.; Dinion, Nicole L.; Williams, Mark B.] Univ Virginia, Charlottesville, VA 22908 USA. [Welch, Benjamin; Saviour, Torre St.; Kieper, Doug] Dilon Technol Inc, Newport News, VA 23606 USA. [Majewski, Stan; McKisson, John; Kross, Brian; Proffitt, James; Stolin, Alexander] Thomas Jefferson Natl Accelerator Facility, Newport News, VA 23606 USA. RP Judy, PG (reprint author), Univ Virginia, Charlottesville, VA 22908 USA. EM pjudy@virginia.edu NR 4 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4040 EP + DI 10.1109/NSSMIC.2007.4437015 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403041 ER PT S AU Kriplani, A Schlyer, D Vaska, P Woody, C Stoll, S Logan, J Southekal, S Junnarkar, S Pratte, JF AF Kriplani, A. Schlyer, D. Vaska, P. Woody, C. Stoll, S. Logan, J. Southekal, S. Junnarkar, S. Pratte, J. F. GP IEEE TI Feasibility studies for extracting an input function for quantitative Positron Emission Tomography using a Wrist Scanner SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID CEREBRAL METABOLIC-RATE; GLUCOSE; PET AB The Wrist Scanner is a small radioactivity detector being developed to image arteries in the wrist for non-invasive estimation of an input function for quantitative Positron Emission Tomography (PET) studies. A prototype four detector LSO-APD array was characterized and tested in a clinical setting. The scanner has a sensitivity of 4 cps/nCi/cc and a resolution at the arterial position of the wrist is 2.3 mm. Tomographic images of the human wrist were acquired using the MicroPET R4 scanner. These images were used to measure the tissue radioactivity interference, study partial volume effects and to estimate an image-derived input function from the radial and ulnar arteries. The metabolic rate of glucose calculated using an image derived input function from the wrist was compared to the values calculated using the invasive arterial input function. A paired two tailed t-test showed that these values did not differ at a significance level of p<0.05. C1 [Kriplani, A.; Southekal, S.] SUNY Stony Brook, Stony Brook, NY 11970 USA. [Schlyer, D.; Vaska, P.; Woody, C.; Stoll, S.; Logan, J.; Junnarkar, S.; Pratte, J. F.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Kriplani, A (reprint author), SUNY Stony Brook, Stony Brook, NY 11970 USA. EM aarfi@bnl.gov FU U.S. Department of Energy (OBER) [DE-AC02-98CH10886] FX This work was supported by the U.S. Department of Energy (OBER) under Prime Contract No. DE-AC02-98CH10886 NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4051 EP + DI 10.1109/NSSMIC.2007.4437017 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403043 ER PT S AU Huang, Q Gullberg, GT AF Huang, Qiu Gullberg, Grant T. GP IEEE TI Attenuation corrected tensor tomography attenuation helps in the case of insufficient measurements SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE tensor; attenuation correction; tomography AB This study was performed to investigate whether knowledge of the attenuation distribution is helpful in reconstruction of a symmetric second order tensor field (three unknown components for every point in two-dimensional (2D) Euclidean space and six unknown components in three-dimensional (3D) Euclidean space) from fewer than three directional measurements of attenuated projections in 2D space and fewer than six directional measurements in 3D space. A least-squares method was adopted to reconstruct the tensor field in 2D space from one directional measurement instead of three. With the prior information of the attenuation distribution a better reconstruction could be expected, compared to the situation where attenuation was assumed to be absent. As a second example, diffusion tensor tomography MRI was simulated to show that knowledge of the attenuation distribution helps in the reconstruction of a tensor field from fewer projections of attenuated directional measurements. If attenuation is known, the algorithm was able to accurately reconstruct all six unknown components of the tensor field from six directional projections. For the reconstruction of only five directional measurements involving insufficient measurements, a better reconstruction of the components of the tensor field was obtained for the case of a constant attenuator greater than zero than for the case with a constant attenuator equal to zero. This presents an intriguing inverse problem where attenuation seems to help in the solution of an underdetermined inverse problem. C1 [Huang, Qiu; Gullberg, Grant T.] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Huang, Q (reprint author), EO Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,Mail Stop 55R0121, Berkeley, CA 94720 USA. NR 11 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4103 EP 4109 DI 10.1109/NSSMIC.2007.4437026 PG 7 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403052 ER PT S AU Vaska, P Woody, C Schlyer, D Pratte, JF Junnarkar, S Southekal, S Stoll, S Schulz, D Schiffer, W Alexoff, D Lee, D Patel, V Purschke, M Lee, W Fried, J Lenz, W Krishnamoorthy, S Maramraju, S Kriplani, A Radeka, V O'Connor, P Lecomte, R Fontaine, R AF Vaska, P. Woody, C. Schlyer, D. Pratte, J. -F. Junnarkar, S. Southekal, S. Stoll, S. Schulz, D. Schiffer, W. Alexoff, D. Lee, D. Patel, V. Purschke, M. Lee, W. Fried, J. Lenz, W. Krishnamoorthy, S. Maramraju, S. Kriplani, A. Radeka, V. O'Connor, P. Lecomte, R. Fontaine, R. GP IEEE TI The design and performance of the 2(nd)-generation RatCAP awake rat brain PET system SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The original prototype RatCAP PET scanner for conscious rat brain imaging has undergone a redesign of most major components resulting in a distinct 2(nd)-generation instrument. While maintaining the same field of view (38 mm diameter, 18 mm axial) and similar overall architecture, the new design allows for longer crystals to provide approximately a factor of 2 increase in coincidence sensitivity with a minimal increase in size and weight. The front-end electronics ASIC has been significantly upgraded, featuring programmable amplifier gains, lower noise, differential digital communication (LVDS), and selectable energy window modes and analog outputs for debugging. The rigid-flex circuit interconnecting the 12 blocks is now more mechanically stable and draws less power which minimizes APD gain shifts. The downstream time-stamp and signal processing module (TSPM) has been modified to be compatible with the new ASICs and further includes DACs for threshold control, twice as many inputs, and a doubling of data throughput capacity. The user interface and data acquisition software is in Labview, and data processing and image reconstruction software is being further developed to maximize imaging accuracy for quantitative neuroscience studies. Finally, a new mechanical support system has been constructed to improve the rat's tolerance of the scanner. Preliminary data indicate improved energy and time resolution compared to the 1(st)-generation prototype and first images of the rat brain while conscious have been obtained. C1 [Vaska, P.; Woody, C.; Schlyer, D.; Pratte, J. -F.; Junnarkar, S.; Stoll, S.; Schulz, D.; Schiffer, W.; Alexoff, D.; Patel, V.; Purschke, M.; Lee, W.; Fried, J.; Lenz, W.; Radeka, V.; O'Connor, P.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Southekal, S.; Lee, D.; Krishnamoorthy, S.; Maramraju, S.; Kriplani, A.] SUNY Stony Brook, Stony Brook, NY USA. [Lecomte, R.; Fontaine, R.] Univ Sherbrooke, Sherbrooke, PQ, Canada. RP Vaska, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM vaska@bnl.gov FU U.S. Department of Energy (OBER) [DE-AC02-98CH10886] FX Manuscript received November 19, 2007. This work was supported by the U.S. Department of Energy (OBER) under Prime Contract No. DE-AC02-98CH10886. NR 3 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4181 EP + DI 10.1109/NSSMIC.2007.4437040 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403066 ER PT S AU Boutchko, R Sitek, A Gullberg, GT AF Boutchko, Rostyslav Sitek, Arkadiusz Gullberg, Grant T. GP IEEE TI Attenuation correction in SPECT images reconstructed on multi-resolution point clouds SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Irregular point cloud distributions of grid points are used to form a tetrahedral mesh for representation of images reconstructed from projections. Previously we demonstrated that point clouds provide a significant gain in sparseness of a 3D image representation without apparent loss in resolution. Point clouds have been suggested as natural representations for factor analysis of dynamic SPECT data. In order to extract quantitative information about the kinetics of a radiotracer in the body, X-ray attenuation has to be taken into account. In this paper, we investigate attenuation correction methods that can be used with the new method of image representation. The reconstructed function is sampled on an irregular grid (cloud) of points, which is used to form a tetrahedral mesh such that a continuous function is formed by linear interpolation between the vertices of each tetrahedron. The image reconstruction relies on the underlying algorithm that computes the contribution of intensity at each point of the sinogram. The presented work investigates two methods for incorporating the attenuation map into the reconstruction algorithm. For each ray propagation direction, attenuation factors are computed for the tetrahedron vertices. The method is evaluated by applying it to the reconstruction of (TI)-T-210 canine heart data acquired using the GE Millennium VH Hawkeye SPECT-CT system. C1 [Boutchko, Rostyslav; Gullberg, Grant T.] EO Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS55R0121, Berkeley, CA 94720 USA. [Sitek, Arkadiusz] Harvard Univ, Brigham & Womens Hosp, Sch Med, Boston, MA USA. RP Boutchko, R (reprint author), EO Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS55R0121, Berkeley, CA 94720 USA. EM RBuchko@lbl.gov OI Sitek, Arkadiusz/0000-0002-0677-4002 FU National Institutes of Health (NIH) [R01-HL50663, R21-CA123057]; U.S. Department of Energy [DE-AC03-76SF00098] FX Manuscript received November 20, 2007. This work was supported in part by grants R01-HL50663 and R21-CA123057 from the National Institutes of Health (NIH) and the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4208 EP + DI 10.1109/NSSMIC.2007.4437045 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403071 ER PT S AU Reutter, BW Gullberg, GT Boutchko, R Balakrishnan, K Botvinick, EH Huesman, RH AF Reutter, Bryan W. Gullberg, Grant T. Boutchko, Rostyslav Balakrishnan, Karthikayan Botvinick, Elias H. Huesman, Ronald H. GP IEEE TI Fully 4-D dynamic cardiac SPECT image reconstruction using spatiotemporal B-spline voxelization SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE DE dynamic SPECT; SPECT/CT; fully four-dimensional reconstruction; spatiotemporal B-splines; penalized least-squares ID KINETIC-PARAMETER ESTIMATION; PROJECTION MEASUREMENTS; DISTRIBUTIONS AB We developed fully 4-D penalized least-squares reconstruction methods that use overlapping multiresolution B-splines to represent radiopharmaceutical distributions that vary smoothly in space and time in human dynamic cardiac SPECT images. This approach does not require segmentation, and improves signal-to-noise and increases computational efficiency compared to methods based on small, non-overlapping cube-shaped voxels and rectangular time windows. The support of spatial B-splines was extended into the time dimension to obtain estimates of time-activity curves directly from projections for a human dynamic Tc-99m-sestamibi cardiac SPECT/CT study. Projection data were acquired in 1-sec time frames with an angular step of 5 deg per frame on a GE Millennium VH Hawkeye SPECT/CT scanner. Attenuation and depth-dependent collimator response were modeled, but not scatter. The 4-D B-splines were piecewise trilinear in space and piecewise quadratic in time. The splines were organized on a 3-D spatial grid that provided uniform sampling of 17.7 nun in each dimension, and on a I-D temporal grid that provided nonuniform sampling intervals of 0-4, 4-15, 15-48, and 48-144 sec during the first two gantry rotations. The use of nonuniform time sampling with 4-D B-splines that varied quadratically in time yielded smooth time-activity curves that captured the relatively fast rise and fall of tracer in the right and left blood chambers, as well as uptake and retention of tracer in the left ventricular myocardium. These methods can also be applied to dynamic PET. Index Terms-Dynamic SPECT, SPECT/CT, fully four-dimensional reconstruction, spatiotemporal B-splines, penalized least-squares C1 [Reutter, Bryan W.; Gullberg, Grant T.; Boutchko, Rostyslav; Huesman, Ronald H.] Lawrence Berkeley Natl Lab, Dept Med Imaging Technol, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Balakrishnan, Karthikayan] Philips Med Syst, Cleveland, OH USA. [Botvinick, Elias H.] Univ Calif San Francisco, Dept Radiol & Med, San Francisco, CA 94143 USA. RP Reutter, BW (reprint author), Lawrence Berkeley Natl Lab, Dept Med Imaging Technol, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM bwreutter@lbl.gov FU National Institutes of Health of U. S. Department of Health and Human Services [R01-HL50663, R01-HL71253]; U. S. Department of Energy [DE-AC03-76SF00098] FX This work was supported by the National Institutes of Health of the U. S. Department of Health and Human Services under grants R01-HL50663 and R01-HL71253, and by the Director, Office of Science, Office of Biological and Environmental Research, Medical Sciences Division of the U. S. Department of Energy under contract DE-AC03-76SF00098. NR 11 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4217 EP + DI 10.1109/NSSMIC.2007.4437048 PG 3 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403074 ER PT S AU Boutchko, R Balakrishnan, K Reutter, BW Sauve, A Gullberg, GT AF Boutchko, Rostyslav Balakrishnan, Karthikayan Reutter, Bryan W. Sauve, Anne Gullberg, Grant T. GP IEEE TI Small animal imaging with attenuation correction using clinical SPECT/CT scanners SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Our group has previously reported on performing single photon emission tomography (SPECT) studies on rats, using a GE Hawkeye Millennium SPECT-CT scanner with pinhole collimators. The main challenge to obtaining quantitative physiological information from such data is the lack of X-ray attenuation data for the small animals. In this paper we present an experimental design in which a nonspecific clinical SPECT-CT scanner is used to collect both transmission and emission scan data for small animals. Necessary hardware enhancements include construction of a new animal bed and construction of a modified emission-transmission calibration object. An emission scan of this calibration object is used to determine the study-specific geometrical parameters of the gantry. In the past, we have shown that 25 adjustable parameters are needed to describe the angle-dependent positions of the detectors and pinhole collimators in order to obtain sufficient spatial precision. A CT scan of the calibration object is used to achieve three-dimensional image registration by aligning the transmission and emission fields of view. The emission system matrix is calculated by ray tracing. The algorithm corrects for X-ray attenuation and for the system geometric response that results from the finite sizes of the pinhole aperture and the detector pixels. The system matrix was applied to the reconstruction of static and dynamic SPECT images using the ML-EM algorithm with a total-variation regularization term. In future studies, time-varying data from the first minute of acquisition will be used to extract kinetic information about how radiopharmaceuticals interact with different tissue types. C1 [Boutchko, Rostyslav; Balakrishnan, Karthikayan; Reutter, Bryan W.; Sauve, Anne; Gullberg, Grant T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Boutchko, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4294 EP 4295 DI 10.1109/NSSMIC.2007.4437065 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403091 ER PT S AU Junnarkar, SS Fried, J Southekal, S Maramraju, SH Pratte, JF O'Connor, P Radeka, V Vaska, P Woody, C Schlyer, D Fontaine, R AF Junnarkar, Sachin S. Fried, Jack Southekal, Sudeepti Maramraju, Sri Harsha Pratte, Jean-Francois O'Connor, Paul Radeka, Veljko Vaska, Paul Woody, Craig Schlyer, David Fontaine, Rejean GP IEEE TI New Time to Digital Converter, signal processing, data acquisition, calibration and test hardware for RatCAP SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE ID PET AB Altera Stratix II family Field Programmable Gate Array (FPGA) based realization of the 12 channel Time to Digital Converter (TDC), address serial decoder and PCI based DAQ system for the next generation of Rat Conscious Animal PET (RatCAP) is presented in detail. TDC realization approach using an FPGA is further investigated and resulting circuits are characterized. Previous generation RatCAP TDC characteristics are shown for comparison. TDC circuits were realized as a two stage solution. First stage of coarse TDC component consisted of binary counter running at system clock speed of 100 MHz, giving 10 ns resolution. Second stage of fine TDC component was realized to achieve sub nano second resolution with 625 ps LSB. Routing delays between Logic Array Blocks (LAB) combined with propagation delay of logic cells called LCELL were used to generate different clock phases, to achieve sub clock speed resolution TDC. Altera LogicLock(TM) toolset and assignment based approach were used for replicable and tighter placements of the supporting logic to achieve the required timing performance. PCI based custom designed board with two banks of Static Random Access Memory (SRAM) constituted the DAQ and control electronics. Test results with full 12 blocks, RatCAP front end electronics are presented. TDC realization and characterization is discussed in details. C1 [Junnarkar, Sachin S.; Fried, Jack; Southekal, Sudeepti; Maramraju, Sri Harsha; Pratte, Jean-Francois; O'Connor, Paul; Radeka, Veljko; Vaska, Paul; Woody, Craig; Schlyer, David] Brookhaven Natl Lab, Upton, NY 11973 USA. [Fontaine, Rejean] Univ Sherbrooke, Sherbrooke, PQ J1K 2R1, Canada. RP Junnarkar, SS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. FU DOE Office of Biological and Environmental Research; DOE [DE-AC02-98CH10886] FX This work is supported under a grant from the DOE Office of Biological and Environmental Research and DOE Contract DE-AC02-98CH10886. All authors are with Brookhaven National Laboratory, Upton, New York 11973-5000, except, R. Fontaine, who is with Universite de Sherbrooke, Sherbrooke, Quebec J1K 2R1. NR 10 TC 1 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4597 EP + DI 10.1109/NSSMIC.2007.4437132 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403158 ER PT S AU Azmoun, B Caccavano, A Crary, D Herstoff, J Keamey, K Keeler, G Majka, R Saini, G Sinsheimer, J Simon, F Smimov, N Surrow, B Woody, C AF Azmoun, B. Caccavano, A. Crary, D. Herstoff, J. Keamey, K. Keeler, G. Majka, R. Saini, G. Sinsheimer, J. Simon, F. Smimov, N. Surrow, B. Woody, C. GP IEEE TI A study of GEM foils produced at Tech-Etch SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB Tech-Etch is a manufacturing company that produces numerous types of flexible circuits and precision photo-etched parts for industrial use. They have developed the capability for producing GEM foils which can be used in a variety of research or commercial applications. We have studied a number of GEM foils produced at Tech-Etch and compared their properties and performance to GEM foils produced at CERN and by other manufacturers. Results will be reported on their gain characteristics, gain stability and uniformity, and rate dependence compared to other foils, and on their performance as actual tracking detectors in a test beam environment. C1 [Azmoun, B.; Woody, C.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Simon, F.; Surrow, B.] MIT, Dept Phys, Boston, MA USA. [Majka, R.; Smimov, N.] Yale Univ, Dept Phys, New Haven, CT 06520 USA. [Crary, D.; Keamey, K.; Keeler, G.; Saini, G.] Tech Etch, Plymouth, MA, England. [Caccavano, A.] Univ Oregon, Eugene, OR 97403 USA. [Herstoff, J.] Muhlenberg Coll, Allentown, PA USA. [Sinsheimer, J.] Ohio State Univ, Columbus, OH 43210 USA. RP Azmoun, B (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM azmoun@bnl.gov FU U.S. Department of Energy, Division of Nuclear Physics [DE-AC02-98CH10886] FX This work was supported by the U.S. Department of Energy, Division of Nuclear Physics, under Prime Contract No. DE-AC02-98CH10886 NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4634 EP + DI 10.1109/NSSMIC.2007.4437142 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403168 ER PT S AU Anderson, W Azmoun, B Chi, CY Citron, Z Dubey, A Durham, JM Fraenkel, Z Hemmick, T Kamin, J Kozov, A Milov, A Naglis, M Pisani, R Ravinovich, I Sakaguchi, T Sharma, D Sickles, A Tserruya, I Woody, C AF Anderson, W. Azmoun, B. Chi, C. -Y. Citron, Z. Dubey, A. Durham, J. M. Fraenkel, Z. Hemmick, T. Kamin, J. Kozov, A. Milov, A. Naglis, M. Pisani, R. Ravinovich, I. Sakaguchi, T. Sharma, D. Sickles, A. Tserruya, I. Woody, C. GP IEEE TI Understanding the gain characteristics of GEMs inside the Hadron Blind Detector in PHENIX SO 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11 SE IEEE Nuclear Science Symposium Conference Record LA English DT Proceedings Paper CT IEEE Nuclear Science Symposium/Medical Imaging Conference CY OCT 26-NOV 03, 2007 CL Honolulu, HI SP IEEE AB The Hadron Blind Detector (HBD) is new upgrade detector for the PHENIX experiment at RHIC that consists of a windowless Cherenkov radiator directly coupled to a set of triple Gas Electron Multipliers (GEMs). The individual GEMs measure 22x27 cm(2), and the top GEM in the stack is coated with a similar to 300 not layer of CsI that serves as a photocathode. The signal amplitude from the triple GEM stack is used to differentiate between single isolated electrons and overlapping electrons from close pairs. Therefore, the absolute gain of the GEM stack is a crucial parameter in understanding and interpreting the data. We accumulated extensive data on the GEMs during the design and construction of the detector, including gain variation with time, charging effects, saturation, gain uniformity, and source rate dependence. These results, as well as our experience in operating the detector during its first run at RHIC, will be presented at the Workshop. C1 [Anderson, W.; Citron, Z.; Durham, J. M.; Hemmick, T.; Kamin, J.] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA. [Dubey, A.; Fraenkel, Z.; Kozov, A.; Naglis, M.; Ravinovich, I.; Sharma, D.; Tserruya, I.] Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel. [Azmoun, B.; Milov, A.; Sakaguchi, T.; Sickles, A.; Woody, C.] Brookhaven Natl Lab, Upton, NY USA. [Chi, C. -Y.] Columbia Univ, Nevis Labs, New York, NY USA. RP Anderson, W (reprint author), SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA. EM itzhak.tserruya@weizmann.ac.il; woody@bnl.gov OI Durham, J. Matthew/0000-0002-5831-3398 FU U.S. Department of Energy, Division of Nuclear Physics [DE-AC02-98CH10886] FX This work was supported by the U.S. Department of Energy, Division of Nuclear Physics, under Prime Contract No. DE-AC02-98CH10886 NR 2 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1082-3654 BN 978-1-4244-0922-8 J9 IEEE NUCL SCI CONF R PY 2007 BP 4662 EP + DI 10.1109/NSSMIC.2007.4437147 PG 2 WC Physics, Applied; Imaging Science & Photographic Technology; Physics, Nuclear; Physics, Particles & Fields; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA BHY13 UT WOS:000257380403173 ER PT B AU Zelenski, A Alessi, J Kponou, A Ritter, J Zubets, V AF Zelenski, A. Alessi, J. Kponou, A. Ritter, J. Zubets, V. GP IEEE TI Towards 100% polarization in the optically-pumped polarized ion source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID OPTIMIZATION AB The depolarization factors in the multi-step spin-transfer polarization technique and basic limitations on maximum polarization in the OPPIS (Optically-Pumped Polarized IT Ion Source) are discussed. Detailed studies of polarization losses in the RHIC OPPIS and the source parameters optimization resulted in the OPPIS polarization increase to 86-90%. This contributed to increasing polarization in the AGS and RHIC to 65 similar to 70%. C1 [Zelenski, A.; Alessi, J.; Kponou, A.; Ritter, J.; Zubets, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zelenski, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1 EP 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300001 ER PT B AU Welton, RF Stockli, MP Murray, SN Pennisi, TR Han, B Kang, Y Goulding, RH Crisp, DW Luciano, NP Carmichael, JR Carr, J AF Welton, R. F. Stockli, M. P. Murray, S. N. Pennisi, T. R. Han, B. Kang, Y. Goulding, R-H. Crisp, D. W. Luciano, N. P. Carmichael, J. R. Carr, J. GP IEEE TI Advanced RF-driven H(-) ion sources at the SNS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SPALLATION NEUTRON SOURCE AB The US Spallation Neutron Source* (SNS), will require substantially higher average and pulse H(-) beam current than can be produced from conventional H(-) ion sources such as the baseline LBNL-SNS source. IT currents of 70-100 mA with an RMS emittance of 0.20-0.35 pi mm mrad and a similar to 7% duty-factor will be needed for the SNS power upgrade project in 2010. We are therefore investigating several advanced ion source concepts based on RF plasma excitation. First, a generalized discussion of our source development strategy is presented as well as the performance characteristics of a large-plasma-volume, external antenna source based on an Al(2)O(3) plasma chamber. The design and results of computational modeling of a high-power version of this source featuring an AlN plasma chamber is subsequently discussed as well as a high-efficiency extraction system necessary for high-current operation. C1 [Welton, R. F.; Stockli, M. P.; Murray, S. N.; Pennisi, T. R.; Han, B.; Kang, Y.; Goulding, R-H.; Crisp, D. W.; Luciano, N. P.; Carmichael, J. R.; Carr, J.] Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37830 USA. RP Welton, RF (reprint author), Oak Ridge Natl Lab, SNS, POB 2008, Oak Ridge, TN 37830 USA. NR 13 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 4 EP 6 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300002 ER PT B AU Hardek, T Piller, M Champion, M Crofford, M Ma, H Zaltsman, A Smith, K AF Hardek, T. Piller, M. Champion, M. Crofford, M. Ma, H. Zaltsman, A. Smith, K. GP IEEE TI The spallation neutron source accumulator ring RF system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Spallation Neutron Source (SNS) accumulator ring is a fixed-frequency proton storage ring located at the output of the SNS Linear Accelerator (Linac). Its purpose is to redistribute the I millisecond long H- beam pulses from the SNS Linac into high-intensity 695 nanosecond long pulses of protons for delivery to the neutron target. The RF bunching system controls longitudinal beam distribution during the accumulation process and maintains a 250+ nanosecond gap required for beam extraction. The RF system consists of three stations which operate at the beam revolution frequency of 1.05 MHz and a fourth station providing a second harmonic component at 2.1 MHz. The beam pulse at extraction consists of 1.6e4 protons representing a peak beam current of 52 amperes. The system utilizes four 600 kW tetrodes to provide the RF current necessary to produce the 40 kV peak fundamental frequency bunching voltage and to control phase and amplitude at high beam current. A 20 kV peak second harmonic voltage is intended to control longitudinal beam distribution to control the peak circulating current. In this paper we review the design concepts incorporated into this heavily beam-loaded RF system and discuss its commissioning status. C1 [Hardek, T.; Piller, M.; Champion, M.; Crofford, M.; Ma, H.] ORNL, Spallat Neutron Source, Oak Ridge, TN 37831 USA. [Zaltsman, A.; Smith, K.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Hardek, T (reprint author), ORNL, Spallat Neutron Source, Oak Ridge, TN 37831 USA. FU UT-Battelle; LLC for the U.S. Department of Energy [DE-AC05-00OR22725] FX SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 7 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300003 ER PT B AU Wilcox, RB Staples, JW AF Wilcox, R. B. Staples, J. W. GP IEEE TI Systems design concepts for optical synchronization in accelerators SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SUBFEMTOSECOND TIMING JITTER; LINK; STABILIZATION; LASER AB Development of accelerator-based light sources is expanding the size of femtosecond laser systems from tabletop devices up to kilometer-scale facilities. New optical techniques are needed to maintain temporal stability in these large systems. We present methods for distributing timing information over optical fiber using continuous optical waves, and how these can be employed in advanced accelerators requiring less than 100fs timing stability. Different techniques combine to form a tool set that can provide for synchronization down to a few femtoseconds. Practical examples are given for timing systems applicable to FELs now under construction, with experimental results to show these systems can be built with required performance. C1 [Wilcox, R. B.; Staples, J. W.] LBNL, Berkeley, CA 94720 USA. RP Wilcox, RB (reprint author), LBNL, Berkeley, CA 94720 USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 19 EP 21 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300007 ER PT B AU Messmer, P Fillmore, D Sobol, A Mullowney, P Paul, K Bruhwiler, D Todd, DS Leitner, D AF Messmer, P. Fillmore, D. Sobol, A. Mullowney, P. Paul, K. Bruhwiler, D. Todd, Damon S. Leitner, Daniela GP IEEE TI Simulation-driven optimization of heavy-ion production in ECR sources SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Next-generation heavy-ion beam accelerators require a wide variety of high charge state ion beams (from protons to uranium) with up to an order of magnitude higher intensity than that demonstrated with conventional Electron Cyclotron Resonance (ECR) ion sources. Optimization of the ion beam production for each element is therefore required. Efficient loading of the material into the ECR plasma is one of the key elements for optimizing the ion beam production. High-fidelity simulations provide a means to understanding the deposition of uncaptured metal atoms along the walls. This information would help to optimize the loading process into the ECR plasma. We are currently extending the plasma simulation framework VORPAL with models to investigate effective loading of heavy metals into ECR ion source via alternate mechanisms, including vapor loading, ion sputtering and laser ablation. First results of the ion production for different loading scenarios are presented. C1 [Messmer, P.; Fillmore, D.; Sobol, A.; Mullowney, P.; Paul, K.; Bruhwiler, D.] Tech X Corp, Boulder, CO USA. [Todd, Damon S.; Leitner, Daniela] LBNL, Berkeley, CA USA. RP Messmer, P (reprint author), Tech X Corp, Boulder, CO USA. EM messmer@txcorp.com FU U.S. DOE Office of Science; Office of Nuclear Physics [DE-FG02-05ER84173] FX Work supported by the U.S. DOE Office of Science, Office of Nuclear Physics, under grant DE-FG02-05ER84173 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 31 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300011 ER PT B AU Kurennoy, SS Rybarcyk, LJ Wangler, TP AF Kurennoy, S. S. Rybarcyk, L. J. Wangler, T. P. GP IEEE TI Efficient accelerating structures for low-energy light ions SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The radio-frequency quadrupole (RFQ) accelerator is the best structure immediately after an ion source for accelerating light-ion beams with considerable currents. On the other hand, the higher-energy part of the RFQ is known to be not a very efficient accelerator. We consider alternative room-temperature RF accelerating structures for the beam velocities in the range of a few percent of the speed of light - including H-mode cavities and drift-tube linacs - and compare them with respect to their efficiency, compactness, ease of fabrication, and overall cost. Options for the beam transverse focusing in such structures are discussed. Possible applications include a compact deuteron-beam accelerator up to the energy of a few MeV for homeland defense. C1 [Kurennoy, S. S.; Rybarcyk, L. J.; Wangler, T. P.] LANL, Los Alamos, NM 87545 USA. RP Kurennoy, SS (reprint author), LANL, Los Alamos, NM 87545 USA. EM kurermov@lanl.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 43 EP 45 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300015 ER PT B AU Brajuskovic, B Collins, J Hartog, PD Morrison, L Waldschmidt, G AF Brajuskovic, B. Collins, J. Hartog, P. Den Morrison, L. Waldschmidt, G. GP IEEE TI Thermomechanical design of normal-conducting deflecting cavities at the advanced photon source for short x-ray pulse generation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A normal-conducting deflecting cavity is being designed at the Advanced Photon Source (APS) as a part of the short x-ray pulse project intended to provide users with approximately 2 picosecond x-rays. The system will use two pairs of 3-cell cavities in sectors 6ID and 7ID for the generation of the x-ray pulse in the 7ID beamline. The 3-cell cavities are designed to provide the desired beam deflection while absorbing in excess of 4 kW of power from a pulsed rf system and up to 2.6 kW in the damper system of high-order mode (HOM) and low-order mode (LOM) waveguides. Since the cavity frequency is very sensitive to thermal expansion, the cooling water system is designed so that it is able to control cavity temperature to within 0.1 degrees C. This paper describes the optimization of the thermomechanical design of the cavity based on calculation of thermal stresses and displacement caused by the generated heat loads, and presents the design of a cooling water system required for the proper operation of the cavities. C1 [Brajuskovic, B.; Collins, J.; Hartog, P. Den; Morrison, L.; Waldschmidt, G.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Brajuskovic, B (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 46 EP 48 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300016 ER PT B AU Dowd, R Boland, M LeBlanc, G Spencer, M Tan, E Byrd, J Sannibale, F AF Dowd, Rohan Boland, Mark LeBlanc, Gregory Spencer, Martin Tan, Eugene Byrd, John Sannibale, Fernando GP IEEE TI Measurements of impedance and beam instabilities at the Australian Synchrotron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we present the first measurements of machine impedance and observed beam instabilities at the Australian Synchrotron. Impedance measurements are made by studying the single bunch behaviour with beam current, using optical and X-ray diagnostic beamlines. An observed coupled-bunch instability, its cause and cure is also discussed. C1 [Dowd, Rohan; Boland, Mark; LeBlanc, Gregory; Spencer, Martin; Tan, Eugene] ASP, Clayton, Vic, Australia. [Byrd, John; Sannibale, Fernando] LBNL, Berkeley, CA USA. RP Dowd, R (reprint author), ASP, Clayton, Vic, Australia. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 52 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300018 ER PT B AU Zhukov, A Assadi, A AF Zhukov, A. Assadi, A. GP IEEE TI Beam loss simulation of Sns Linac SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We are developing a sophisticated system of beam loss pattern evaluation and residual radiation estimation. We have installed a number of Neutron Detectors (ND) and Ionization Chambers along the SNS LINAC. In this paper we present our implementation and simulation of the losses by inserting Faraday Cups, using Beam Stops and running Wire Scanners at different energies. The measured losses are simulated by 3-D transport codes (GEANT4, SHIELD, MCNPX). We compare two different sets of Beam Loss Monitors (BLM): Ionization Chambers (detecting X-ray and gamma radiation) and Photo-Multiplier Tubes with a neutron converter (detecting neutrons) and show that such a combination is a better way to measure beam losses than relying on detectors of only one type. We interpret the loss signal in terms of beam current lost in the SNS LINAC with accurate longitudinal loss distribution and plan to automate beam steering according to loss-monitor readings by using a Loss Pattern Database developed by simulating different loss scenarios with the transport codes. C1 [Zhukov, A.] RAS, Inst Nucl Res, Moscow 117901, Russia. [Assadi, A.] ORNL, Oak Ridge, TN 37831 USA. RP Zhukov, A (reprint author), RAS, Inst Nucl Res, Moscow 117901, Russia. FU Division of Materials Science; U.S. Department of Energy [DE-AC05-96OR22464]; UT-Battelle Corporation for Oak Ridge National Laboratory FX Research on the Spallation Neutron Source is sponsored by the Division of Materials Science, U.S. Department of Energy, under contract number DE-AC05-96OR22464 with UT-Battelle Corporation for Oak Ridge National Laboratory NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 193 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300065 ER PT B AU Tyukhtin, AV Antipov, SP Kanareykin, A Schoessow, P AF Tyukhtin, A. V. Antipov, S. P. Kanareykin, A. Schoessow, P. GP IEEE TI Applications of Cherenkov radiation in dispersive and anisotropic metamaterials to beam diagnostics SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID WAVE-GUIDE AB We present theoretical and numerical analyses of Cherenkov radiation in bulk anisotropic and dispersive metamaterials and in waveguides loaded with these materials. Anisotropy and dispersion of both permittivity and permeability are taken into account. It is shown that the properties exhibited by these materials allow the design of detectors with unusual and previously unavailable characteristics. C1 [Tyukhtin, A. V.] St Petersburg State Univ, St Petersburg 198504, Russia. [Antipov, S. P.] Argonne Natl Lab, Argonne, IL 60439 USA. [Antipov, S. P.] IL Inst Technol, Chicago, IL 60616 USA. [Kanareykin, A.; Schoessow, P.] Euclid TechLabs LLC, Solon, OH 44139 USA. RP Tyukhtin, AV (reprint author), St Petersburg State Univ, St Petersburg 198504, Russia. EM tyukhtin@bk.ru NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 202 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300068 ER PT B AU Bravin, E Burger, S Dutriat, C Lefevre, T Talanov, V Byrd, JM Chow, K Matis, HS Monroy, M Ratti, A Turner, WC Brambilla, A Jolliot, M Renet, S AF Bravin, E. Burger, S. Dutriat, C. Lefevre, T. Talanov, V. Byrd, J. M. Chow, K. Matis, H. S. Monroy, M. Ratti, A. Turner, W. C. Brambilla, A. Jolliot, M. Renet, S. GP IEEE TI Collision rate monitors for Lhc SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID LUMINOSITY AB Collision rate monitors are essential in bringing particle beams into collision and optimizing the performances of a collider. In the case of LHC the relative luminosity win be monitored by measuring the flux of small angle neutral particles produced in the collisions. Due to the very different luminosity levels at the four interaction regions (IR) of LHC two different types of monitors have been developed. At the high luminosity IR (ATLAS and CMS) fast ionization chambers will be installed while at the other two (ALICE and LHC-b) solid state polycrystalline Cadmium Telluride (CdTe) detectors will be used. The ionization chambers are being developed by LBNL while the CdTe monitors are being developed by CERN and CEA-LETI. C1 [Bravin, E.; Burger, S.; Dutriat, C.; Lefevre, T.; Talanov, V.] CERN, Geneva, Switzerland. [Byrd, J. M.; Chow, K.; Matis, H. S.; Monroy, M.; Ratti, A.; Turner, W. C.] LBNL, Berkeley, CA USA. [Brambilla, A.; Jolliot, M.; Renet, S.] CEA Grenoble, LETI MINATEC, Grenoble, France. RP Bravin, E (reprint author), CERN, Geneva, Switzerland. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 208 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300070 ER PT B AU Caspers, F Jimenez, JM Jones, OR Kroyer, T Vuitton, C Hamerla, TW Jansson, A Misek, J Pasquinelli, RJ Seifrid, P Sun, D Tinsley, D AF Caspers, Fritz Jimenez, Jose Miguel Jones, Owain Rhodri Kroyer, Tom Vuitton, Christophe Hamerla, Timothy W. Jansson, Andreas Misek, Joel Pasquinelli, Ralph J. Seifrid, Peter Sun, Ding Tinsley, David GP IEEE TI The 4.8 Ghz Lhc Schottky pick-up system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The LHC Schottky observation system is based on traveling wave type high sensitivity pickup structures operating at 4.8 GHz. The choice of the structure and operating frequency is driven by the demanding LHC impedance requirements, where very low impedance is required below 2 GHz, and good sensitivity at the selected band at 4.8 GHz. A sophisticated filtering and triple down-mixing signal processing chain has been designed and implemented in order to achieve the specified 100 dB instantaneous dynamic range without range switching. Detailed design aspects for the complete systems and test results without beam are presented and discussed. C1 [Caspers, Fritz; Jimenez, Jose Miguel; Jones, Owain Rhodri; Kroyer, Tom; Vuitton, Christophe] CERN, Geneva, Switzerland. [Hamerla, Timothy W.; Jansson, Andreas; Misek, Joel; Pasquinelli, Ralph J.; Seifrid, Peter; Sun, Ding; Tinsley, David] Fermilab Natl Accelerator Lab, Batavia, IL USA. RP Caspers, F (reprint author), CERN, Geneva, Switzerland. FU US Department of Energy Office of Science; LARP FX The authors would like to thank the US Department of Energy Office of Science and LARP for financial support.Thanks also to Fermilabs Accelerator Division RF and Mechanical Support Departments and R.Garoby (CERN, AB-BI) and T. Linnecar (CERN, AB-RF) for their support. We would also like to acknowledge the work done by Andrea Boccardi, Marek Gasior and Krzyszt of Kasinski in providing a superb system for the baseb and acquisition of the Schottky signals NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 211 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300071 ER PT B AU Tomas, R Arduini, G Rumolo, G Zimmermann, F Calaga, R Faus-Golfe, A AF Tomas, R. Arduini, G. Rumolo, G. Zimmermann, F. Calaga, R. Faus-Golfe, A. GP IEEE TI Improved algorithms to determine the non-linear optics model of the SPS from non-linear chromaticity SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In recent years several measurements of the SPS nonlinear chromaticity have been performed in order to determine the non-linear optics model of the SPS machine at injection energy for different cycles. In 2006 additional measurements have been performed at injection and during the ramp for the cycle used to accelerate the LHC beam. New and more robust matching algorithms have been developed in 2006 to fit the model to the measurements up to arbitrary chromatic order. In this paper we describe the algorithms used in the analysis of the data and we summarize and compare the results from all experiments. C1 [Tomas, R.; Arduini, G.; Rumolo, G.; Zimmermann, F.] CERN, CH-1211 Geneva 23, Switzerland. [Calaga, R.] BNL, New York, NY USA. [Faus-Golfe, A.] IFIC, Valencia, Spain. RP Tomas, R (reprint author), CERN, CH-1211 Geneva 23, Switzerland. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 238 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300080 ER PT B AU Lyapin, A Goumaris, F Maiheu, B Miller, D Wing, M Chistiakova, M Kolomensky, Y Sadre-Bazzaz, M Petigura, E Slater, M Thomson, M Ward, D Schreiber, HJ Viti, M Kostromin, S Morozov, N Duginov, V Hildreth, M Boogert, S Boorman, G Adolphsen, C Arnold, R Hast, C McCormick, D Szalata, Z Woods, M AF Lyapin, A. Goumaris, F. Maiheu, B. Miller, D. Wing, M. Chistiakova, M. Kolomensky, Yu. Sadre-Bazzaz, M. Petigura, E. Slater, M. Thomson, M. Ward, D. Schreiber, H. -J. Viti, M. Kostromin, S. Morozov, N. Duginov, V. Hildreth, M. Boogert, S. Boorman, G. Adolphsen, C. Arnold, R. Hast, C. McCormick, D. Szalata, Z. Woods, M. GP IEEE TI A prototype energy spectrometer for the ILC at end station a in SLAC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The main physics program of the International Linear Collider requires a measurement of the beam energy with a relative precision of the order 10(-4) or better. A magnetic spectrometer using high resolution beam position monitors (BPMs) has been proposed to achieve this goal. A prototype spectrometer chicane employing four dipole magnets is currently under development at the End Station A in SLAC, intending to demonstrate the required resolution and stability of this method and investigate possible systematic effects and operational issues. This contribution reports on the successful commissioning of the beam position monitor system and the resolution and stability achieved. Also, the initial results from a run with a full spectrometer chicane are presented. C1 [Lyapin, A.; Goumaris, F.; Maiheu, B.; Miller, D.; Wing, M.] UCL, London WC1E 6BT, England. [Chistiakova, M.; Kolomensky, Yu.; Sadre-Bazzaz, M.; Petigura, E.] Berkeley & Lawrence Berkeley Natl Lab, Berkeley, CA USA. [Slater, M.; Thomson, M.; Ward, D.] Univ Cambridge, Cambridge CB2 1TN, England. [Schreiber, H. -J.; Viti, M.] DESY, Hamburg, Germany. [Kostromin, S.; Morozov, N.; Duginov, V.] JINR, Dubna, Russia. [Hildreth, M.] Univ Notre Dame, Notre Dame, IN USA. [Boogert, S.; Boorman, G.] Royal Holloway Univ London, London, England. [Adolphsen, C.; Arnold, R.; Hast, C.; McCormick, D.; Szalata, Z.; Woods, M.] SLAC, Menlo Pk, CA 94025 USA. RP Lyapin, A (reprint author), UCL, London WC1E 6BT, England. EM al@hep.ucl.ac.uk RI Kostromin, Sergei/Q-1101-2015 OI Kostromin, Sergei/0000-0003-1337-6851 FU Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area" [RIDS-011899] FX This work was supported by the Commission of the European Communities under the 6th Framework Programme Structuring the European Research Area, contract number RIDS-011899. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 265 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300089 ER PT B AU Bailey, JL Morgan, JW Capatina, D Nuhn, H AF Bailey, J. L. Morgan, J. W. Capatina, D. Nuhn, H. GP IEEE TI An instrument design for the accurate determination of the electron beam location in the Linac Coherent Light Source undulator SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Linac Coherent Light Source (LCLS), currently under design, requires accurate alignment between the electron beam and each undulator's magnetic centerline. A beam finder wire (BFW) instrument has been developed to provide beam location information that is used to move the undulators to their appropriate positions. A BFW instrument is mounted at each of the 33 magnets in the undulator section. Beam detection is achieved by electrons impacting two carbon fiber wires and then sensing the downstream radiation. The wires are mounted vertically and horizontally on a wire card similar to that of a traditional wire scanner instrument. The development of the BFW presents several design challenges due to the need for high accuracy of the wires' locations and the need for removal of the wires during actual operation of the LCLS (30 microns repeatability is required for the wire locations). In this paper, we present the technical specification, design criteria, mechanical design, and results from prototype tests for the BFW. C1 [Bailey, J. L.; Morgan, J. W.; Capatina, D.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Nuhn, H.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Bailey, JL (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jbailey@anl.gov FU U.S. Department of Energy [W-31-109-ENG-38, DE-AC03-76SF00515] FX Work supported by the U.S. Department of Energy, under Contract Nos. W-31-109-ENG-38 and DE-AC03-76SF00515. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 283 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300095 ER PT B AU Chae, YC Wang, YS Xiao, AM AF Chae, Yong-Chul Wang, Yusong Xiao, Aimin GP IEEE TI Single-bunch instability estimates for the 1-nm APS storage ring upgrade with a smaller vacuum chamber SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We recently studied a lattice achieving 1-nm emittance at the APS storage ring [1]. The successful design required very strong sextupoles in order to tune the machine to the desired positive chromaticity. A preliminary design of such magnets indicated saturation in the poles unless the vacuum chamber gets smaller by a factor of two compared to the existing APS chamber. Since the resistive wall impedance scales as 1/b(3), where b is the radius of the chamber, we questioned how much current we can store in a single bunch at the 1-nm storage ring. In order to answer this question quantitatively, we calculated all wake potentials of impedance elements of the existing APS storage ring with the transverse dimension properly scaled but with the longitudinal dimension kept unchanged. With the newly calculated impedance of a smaller chamber, we estimated the single-bunch current limit. It turned out that the ring with a smaller chamber would not diminish the single-bunch current limit substantially. We present both wake potentials of 1-nm and the existing rings followed by the simulation results carried out for determining the accumulation limit to the ring. C1 [Chae, Yong-Chul; Wang, Yusong; Xiao, Aimin] Argonne Natl Lab, Argonne, IL 60439 USA. RP Chae, YC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM chae@aps.anl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 286 EP 288 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300096 ER PT B AU Chae, YC Wang, Y AF Chae, Yong-Chul Wang, Yusong GP IEEE TI Impedance database II for the advanced Photon Source storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The first Impedance Database [1] constructed at the Advanced Photon Source was successfully used in reproducing the main characteristics of single-bunch instabilities observed in the storage ring. However, the finite bandwidth of the corresponding impedance model was limited to 40 GHz, which happens to be the resolution limit of the density modulation observed in the microwave instability simulation. In order to resolve simulation results never verified in the experiments, we decided to extend the calculated bandwidth of impedance to 100-200 GHz by recalculating the wake potentials excited by a shorter bunch. Since low-order electromagnetic code requires 20-40 grid points per wavelength, reducing the bunch length required a large number of grids for the 3D structure. We used bunch lengths of 1- and 2-mm in the Gaussian distribution in the Impedance Database R project. For the large-scale computation we used the 3D electromagnetic code GdfidL [2] for wake potential calculation at the cluster equipped with 240 GB of memory. The resultant wake potential excited by the short bunch together with application to the storage ring for collective effects is presented in this paper. C1 [Chae, Yong-Chul; Wang, Yusong] Argonne Natl Lab, Argonne, IL 60439 USA. RP Chae, YC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM chae@aps.anl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 289 EP 291 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300097 ER PT B AU Chae, YC Waldschmidt, G Dolgashev, V AF Chae, Y. -C. Waldschmidt, G. Dolgashev, V. GP IEEE TI The wakefield effects of pulsed crab cavities at the advanced photon source for short-x-ray pulse generation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In recent years we have explored the application to the Advanced Photon Source (APS) of Zholents' crab-cavity-based scheme for production of short x-ray pulses [1]. As a near-term project, the APS has elected to pursue a pulsed system using room-temperature cavities [2]. The cavity design has been optimized to heavily damp parasitic modes while maintaining large shunt impedance for the deflecting dipole mode [3]. We evaluated a system consisting of three crab cavities as an impedance source and determined their effect on the single- and multi-bunch instabilities. In the single-bunch instability we used the APS impedance model as the reference system in order to predict the overall performance of the ring when the crab cavities are installed in the future. For multi-bunch instabilities we used a realistic fill pattern, including hybrid-fill, and tracked multiple bunches where each bunch was treated as soft in distribution. C1 [Chae, Y. -C.; Waldschmidt, G.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Dolgashev, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Chae, YC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM chae@aps.anl.gov FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 292 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300098 ER PT B AU Decker, G Den Hartog, P Singh, O Rosenbaum, G AF Decker, Glenn Den Hartog, P. Singh, O. Rosenbaum, Gerd GP IEEE TI Progress toward a hard x-ray insertion device beam position monitor at the Advanced Photon Source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Long-term pointing stability at synchrotron light sources using conventional rf-based particle beam position monitoring is limited by the mechanical stability of the pickup electrode assembly. Photoemission-based photon beam position monitors for insertion device beams suffer from stray radiation backgrounds and other gap-dependent systematic errors. To achieve the goal of 500-nanoradian peak-to-peak pointing stability over a one-week period, the development of a photon beam position detector sensitive only to hard x-rays (> several keV) using copper x-ray fluorescence has been initiated. Initial results and future plans are presented. C1 [Decker, Glenn; Den Hartog, P.; Singh, O.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Rosenbaum, Gerd] Univ Georgia, Athens, GA 30602 USA. RP Decker, G (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 295 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300099 ER PT B AU Dooling, JC Brumwell, FR Donley, LI Harkay, KC Kustom, RL Lien, MK McMichael, GE Middendorf, ME Nassiri, A Wang, S AF Dooling, J. C. Brumwell, F. R. Donley, L. I. Harkay, K. C. Kustom, R. L. Lien, M. K. McMichael, G. E. Middendorf, M. E. Nassiri, A. Wang, S. GP IEEE TI Observations of rising tune during the injection instability of the IPNS RCS proton bunch SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In the Rapid Cycling Synchrotron (RCS), a single proton bunch (h=1) is accelerated from 50 MeV to 450 MeV in approximately 14.2 ms. The bunch experiences an instability shortly after injection (<1 ms). During the first millisecond, the beam is bunched but little acceleration takes place; therefore this period is similar to a storage ring mode of operation. Natural vertical oscillations (assumed to be tune lines) show the vertical tune to be rising toward the bare time value, suggesting neutralization of space charge and a reduction of its detuning effects. Neutralization time near injection ranges from 250 mu s - 500 mu s, depending on the background gas pressure. Oscillations move from the LSB to the USB before disappearing. Tune measurements made with a recently installed ferrite-magnet pinger system show the horizontal chromaticity to be positive early but approaching zero later in the cycle; on the other hand, the vertical chromaticity is negative throughout the cycle. During pinger studies near injection, two vertical lines are observed. Neutralization of the beam space charge implies the generation of plasma in the beam volume early in the cycle which may then dissipate as the time-varying electric fields of the beam become stronger. C1 [Dooling, J. C.; Brumwell, F. R.; Donley, L. I.; Harkay, K. C.; Kustom, R. L.; Lien, M. K.; McMichael, G. E.; Middendorf, M. E.; Nassiri, A.; Wang, S.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Dooling, JC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jcdooling@anal.gov NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 298 EP 300 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300100 ER PT B AU Emery, L AF Emery, L. GP IEEE TI Coupled-bunch instability study of multi-cell deflecting mode cavities for the Advanced Photon Source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The short-pulse X-ray project at the Advanced Photon Source (APS) uses four room-temperature, three-cell, 2.815-GHz, deflecting-mode cavities in two consecutive straight sections. Undamped, these cavities' higher-order and lower-order resonator modes will cause multi-bunch instabilities in longitudinal and transverse planes for any bunch pattern of a 100-mA store. Damping of these modes must be part of the design of the cavities. We report calculations of instability growth rates that were essential in specifying and checking the rf design of the damping structures. We used various operating bunch patterns and scanned levels of damping of the cavities. Because one of the operating bunch patterns is not symmetric, we used a normal mode analysis implemented in the APS code clinchor. Our calculation included random sampling of resonator frequencies in a reasonable range. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Emery, L (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM emery@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 301 EP 303 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300101 ER PT B AU Harkay, K Chae, YC Emery, L Morrison, L Nassiri, A Waldschmidt, G AF Harkay, K. Chae, Y. -C. Emery, L. Morrison, L. Nassiri, A. Waldschmidt, G. GP IEEE TI 200-mA studies in the APS storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Photon Source (APS) storage ring is normally operated with 100 mA of beam current. A number of high-current studies were carried out to determine the multibunch instability limits. The longitudinal multibunch instability is dominated by the rf cavity higher-order modes (HOMs), and the coupled-bunch instability (CBI) threshold is bunch-pattern dependent. We can stably store 200 mA with 324 bunches, and the CBI threshold is 245 mA. With 24 bunches, several components are approaching temperature limits above 160 mA, including the HOM dampers. We do not see any CBI at this current. The transverse multibunch instabilities are most likely driven by the resistive wall impedance; there is little evidence that the dipole HOMs contribute. Presently, we rely on the chromaticity to stabilize the transverse multibunch instabilities. When we stored beam up to 245 mA, we used high chromaticity and the beam was transversely stable. The stabilizing chromaticity was studied as a function of current. We can use these experimental results to predict multibunch instability thresholds for various upgrade options, such as smaller-gap or longer ID chambers and the associated increased impedance. C1 [Harkay, K.; Chae, Y. -C.; Emery, L.; Morrison, L.; Nassiri, A.; Waldschmidt, G.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Harkay, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM harkay@aps.anl.gov NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 304 EP 306 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300102 ER PT B AU Harkay, K Sajaev, V Yang, B AF Harkay, K. Sajaev, V. Yang, B. GP IEEE TI Transverse multibunch bursting instability in the APS storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The horizontal bursting instability was first observed in a single bunch in the Advanced Photon Source (APS) soon after operation began. Above the instability threshold, the bursting is characterized by exponentially growing bunch centroid oscillations whose amplitude saturates, then decays, repeating quasi-periodically. More recently, bursting was also observed with multiple bunches in both the horizontal and vertical planes, showing that this is not purely a single-bunch phenomenon. On the other hand, the multibunch instability threshold is strongly dependent on bunch spacing, and the dependence is markedly different for the two transverse planes. Depending on the bunch spacing, the bunch-to-bunch oscillations are sometimes coupled, sometimes not. In this paper, we discuss the threshold in terms of the chromaticity required to stabilize the beam. We present instability imaging data using a streak camera that shows the bunch-to-bunch oscillation phase, and turn-by-turn beam position histories that give the bursting time dependence for different bunch spacings. Finally, we discuss the machine impedance and measured tune shift with current. C1 [Harkay, K.; Sajaev, V.; Yang, B.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Harkay, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM harkay@aps.anl.gov NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 307 EP 309 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300103 ER PT B AU Lill, R Norum, W Morrison, L Sereno, N Waldschmidt, G Walters, D Smith, S Straumann, T AF Lill, R. Norum, W. Morrison, L. Sereno, N. Waldschmidt, G. Walters, D. Smith, S. Straumann, T. GP IEEE TI Design and performance of the LCLS cavity BPM system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we present the design of the beam position monitor (BPM) system for the LCLS undulator, which features a high-resolution X-band cavity BPM. Each BPM has a TK010 monopole reference cavity and a TM110 dipole cavity designed to operate at a center frequency of 11.384 GHz. The signal processing electronics features a low-noise single-stage three-channel heterodyne receiver that has selectable gain and a phase locking local oscillator. We will discuss the system specifications, design, and prototype test results. C1 [Lill, R.; Norum, W.; Morrison, L.; Sereno, N.; Waldschmidt, G.; Walters, D.] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. [Smith, S.; Straumann, T.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Lill, R (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-ACOS-06CH11357] FX Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-ACOS-06CH11357. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 310 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300104 ER PT B AU Lumpkin, AH Yang, BX Berg, WJ Sereno, NS Yao, CY Rule, DW AF Lumpkin, A. H. Yang, B. X. Berg, W. J. Sereno, N. S. Yao, C. -Y. Rule, D. W. GP IEEE TI Far-field OTR and ODR images produced by 7-GeV electron beams at APS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We have investigated the angular distribution patterns (far-field focus) of optical transition radiation (OTR) and optical diffraction radiation (ODR) generated by 7-GeV electron beams passing through and near an Al metal plane, respectively. The 70-mu rad opening angles of the OTR patterns provide calibration factors for the system. Effects of the upstream quadrupole focusing strength on the patterns as well as polarization effects were observed. The OTR data are compared to an existing OTR single-foil model, while ODR profile results are compared to expressions for single-edge diffraction. ODR was studied with impact parameters of about 1.25 mm, close to the gamma lambda-bar value of 1.4 mm for 628-nm radiation. We expect angle-pointing information along the x axis parallel to the mirror edge is available from the single-lobe ODR data as well as divergence information at the sub-100-mu rad level. Experimental and model results will be presented. C1 [Lumpkin, A. H.; Yang, B. X.; Berg, W. J.; Sereno, N. S.; Yao, C. -Y.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Rule, D. W.] NSWC, Carderock Div, Bethesda, MD 20817 USA. RP Lumpkin, AH (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. FU Argonne Accelerator Institute; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX The authors acknowledge support from K.-J. Kim of the Argonne Accelerator Institute.; Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 313 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300105 ER PT B AU Lumpkin, AH Scarpine, VE Tassotto, GR AF Lumpkin, A. H. Scarpine, V. E. Tassotto, G. R. GP IEEE TI Initial far-field OTR images generated by 120-GeV protons at FNAL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID OPTICAL-TRANSITION RADIATION AB We have successfully imaged for the first time the angular distribution patterns of optical transition radiation (OTR) generated by 120-GeV proton beams passing through an Al metal plane. These experiments were performed at Fermilab (FNAL) with the same chamber, foil, and camera design as with the near-field experiments previously reported. In this case the lens-to-CID-chip separation was remotely adjusted to provide the focus-at-infinity, or far-field optical imaging. Data have been obtained in transport lines both before the antiproton production target and before the NuMI target with particle intensities of about 5 to 22 x 10(12). A two-foil interferometer calculation was also performed. Single-foil experimental and modeling results will be presented. C1 [Lumpkin, A. H.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Scarpine, V. E.; Tassotto, G. R.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RP Lumpkin, AH (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]; U.S. Department of Energy [DE-AC02-CH03000] FX Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357 and by U.S. Department of Energy under Contract No. DE-AC02-CH03000. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 316 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300106 ER PT B AU Lumpkin, AH Evtushenko, P Freyberger, AP Liu, CY AF Lumpkin, A. H. Evtushenko, P. Freyberger, A. P. Liu, C. Y. GP IEEE TI Feasibility of near-field ODR imaging of multi-GeV electron beams at CEBAF SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We have evaluated the feasibility of using the optical diffraction radiation (ODR) generated as a 1- to 6-GeV CW electron beam passes nearby the edge of a single metal conducting plane as a nonintercepting (NI) relative beam size monitor for CEBAF. Previous experiments were successfully done using near-field imaging on the lower-current, 7-GeV beam at APS, and an analytical model was developed for near-field imaging. Calculations from this model indicate sufficient beam size sensitivity in the ODR profiles for beam sizes in the 30- to 50-micron regime as found in the transport lines of CEBAF before the experimental targets. With anticipated beam currents of 100 mu A, the ODR signal from the charge integrated over the video field time should be similar to 500 times larger than in the APS case. These signal strengths will allow a series of experiments to be done on beam energy dependencies, impact parameters, polarization effects, and wavelength effects that should further elucidate the working regime of this technique and test the model. Plans for the diagnostics station that win provide reference optical transition radiation (OTR) images will also be described. C1 [Lumpkin, A. H.] Argonne Natl Lab, Argonne Accelerator Inst, 9700 S Cass Ave, Argonne, IL 60439 USA. [Evtushenko, P.; Freyberger, A. P.; Liu, C. Y.] Jefferson Lab, Newport New, Jefferson, AR USA. RP Lumpkin, AH (reprint author), Argonne Natl Lab, Argonne Accelerator Inst, 9700 S Cass Ave, Argonne, IL 60439 USA. FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]; LLC under U.S. DOE [DE-AC05-06OR23177] FX Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.; Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. The U.S. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 319 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300107 ER PT B AU Norum, WE Yang, BX AF Norum, W. Eric Yang, Bingxin GP IEEE TI A novel FPGA-based bunch purity monitor system at the APS storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Bunch purity is an important source quality factor for the magnetic resonance experiments at the Advanced Photon Source. Conventional bunch-purity monitors utilizing time-to-amplitude converters are subject to dead time. We present a novel design based on a single field-programmable gate array (FPGA) that continuously processes pulses at the full speed of the detector and front-end electronics. The FPGA provides 7778 single-channel analyzers (six per rf bucket). The starting time and width of each single-channel analyzer window can be set to a resolution of 178 ps. A detector pulse arriving inside the window of a single-channel analyzer is recorded in an associated 32-bit counter. The analyzer makes no contribution to the system dead time. Two channels for each rf bucket count pulses originating from the electrons in the bucket. The other four channels on the early and late side of the bucket provide estimates of the background. A single-chip microcontroller attached to the FPGA acts as art EPICS [1] IOC to make the information in the FPGA available to the EPICS clients. C1 [Norum, W. Eric; Yang, Bingxin] Argonne Natl Lab, Argonne, IL 60439 USA. RP Norum, WE (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 322 EP 324 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300108 ER PT B AU Pietryla, A Bui, H Decker, G Laird, R Lill, R Norum, E AF Pietryla, A. Bui, H. Decker, G. Laird, R. Lill, R. Norum, E. GP IEEE TI Status of the rf BPM upgrade at the advanced photon source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Photon Source (APS), a third-generation synchrotron light source, has been in operation for eleven years. The monopulse radio frequency (rf) beam position monitor (BPM) is one of three BPM types now employed in the storage ring at the APS. It is a broadband (10 MHz) system designed to measure single-turn and multi-turn beam positions, but it suffers from an aging data acquisition system. The replacement BPM system retains the existing monopulse receivers and replaces the data acquisition system with high-speed analog-to-digital converters (ADCs) and a field-programmable gate array (FPGA) that performs the signal processing. A first-article system has been constructed and is currently being evaluated. This paper presents the results of testing of the first-article system as well as the progress made in other areas of this upgrade effort C1 [Pietryla, A.; Bui, H.; Decker, G.; Laird, R.; Lill, R.; Norum, E.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Pietryla, A (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM afp@aps.anl.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 325 EP 327 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300109 ER PT B AU Power, JG Conde, ME Gai, W Gao, F Konecny, R Liu, W Yusof, Z Piot, P Rihaoui, M AF Power, J. G. Conde, M. E. Gai, W. Gao, F. Konecny, R. Liu, W. Yusof, Z. Piot, Ph. Rihaoui, M. GP IEEE TI Pepper-pot based emittance measurements of the AWA photoinjector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Argonne Wakefield Accelerator (AWN) RF photocathode gun is a 1.5 cell, L-band, RF photocathode gun operating at 77 MV/m, with emittance compensating solenoids, a magnesium photocathode, and generates an 8 MeV, 1 nC - 100 nC beam. In this paper, we report on a parametric set of measurements to characterize the transverse trace space of the 1 nC electron beam directly out of the gun. We emphasize details of the experimental setup, image analysis, and end with a comparison of the measuremetns to PARMELA simulations. C1 [Power, J. G.; Conde, M. E.; Gai, W.; Gao, F.; Konecny, R.; Liu, W.; Yusof, Z.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Piot, Ph.; Rihaoui, M.] Northern Illinois Univ, De Kalb, IL 60115 USA. RP Power, JG (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jp@anl.gov FU U.S.D.O.E. Office of Science FX Work supported by U.S.D.O.E. Office of Science NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 328 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300110 ER PT B AU Berg, WJ Yang, BX Erwin, LL Shoaf, SE AF Berg, W. J. Yang, B. X. Erwin, L. L. Shoaf, S. E. GP IEEE TI LCLS-S1 optical transition radiation monitor SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Argonne National Laboratory has developed a high-resolution optical transition radiation (OTR) imaging monitor for the Linac Coherent Light Source (LCLS) injection linac at SLAC. The imaging station, OTR-S1, will be located at the S1 spectrometer with a beam energy of 135 MeV. The system will be used to acquire 2-D transverse beam distributions of the accelerated photocathode-gun-generated electron beam. We anticipate an average beam current of 0.2 to 1 nC and nominal beam spot size of 130 mu m (sigma x), 100 mu m (sigma y). The imaging system was designed for a field of view x/y: 10 x 7.5 mm. The spatial resolution of similar to 12 microns was verified over the central 5 x 4 mm region in the visible. A 12-bit digital camera acquires the image and a Mac-based digital frame-capturing system was employed for the initial lab-based performance testing of the device. We report on system development, testing methods, and data analysis. C1 [Berg, W. J.; Yang, B. X.; Erwin, L. L.; Shoaf, S. E.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Berg, WJ (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 331 EP 333 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300111 ER PT B AU Shoaf, S AF Shoaf, S. GP IEEE TI Vector processing enhancements for real-time image analysis SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A real-time image analysis system was developed for beam imaging diagnostics. An Apple Power Mac G5 with an Active Silicon LFG frame grabber was used to capture video images that were processed and analyzed. Software routines were created to utilize vector-processing hardware to reduce the time to process images as compared to conventional methods. These improvements allow for more advanced image processing diagnostics to be performed in real time. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Shoaf, S (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 334 EP 336 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300112 ER PT B AU Sun, X Singh, O AF Sun, X. Singh, O. GP IEEE TI Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in aps storage ring orbit measurements SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Photon Source storage ring employs a real-time orbit correction system to reduce orbit motion up to 50 Hz. This system uses up to 142 narrow-band rf beam position monitors (Nbbpms) in a correction algorithm by sampling at a frequency of 1.53 kHz. Several Nbbpms exhibit aliasing errors in orbit measurements, rendering these Nbbpms unusable in real-time orbit feedback. The aliasing errors are caused by beating effects of the internal sampling clocks with various other processing clocks residing within the BPM electronics. A programmable external clock has been employed to move the aliasing errors out of the active frequency band of the real-time feedback system (RTFB) and rms beam motion calculation. This paper discusses the process of tuning and provides test results. C1 [Sun, X.; Singh, O.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Sun, X (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM xiang@aps.anl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 337 EP 339 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300113 ER PT B AU Yao, CY Lumpkin, AH Rule, DW AF Yao, C. -Y. Lumpkin, A. H. Rule, D. W. GP IEEE TI Numerical simulation of optical diffraction radiation from a 7-GeV beam SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Experimental study and numerical modeling have been performed on the optical diffraction radiation (ODR) of the 7-GeV beam of the Advanced Photon Source (APS) booster-to-storage ring (BTS) transport line. This report describes the simulation method, the results, and the comparison with experiment results. C1 [Yao, C. -Y.; Lumpkin, A. H.; Rule, D. W.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Yao, CY (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM tcyao@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 340 EP 342 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300114 ER PT B AU Sayyar-Rodsari, B Schweiger, C Hartman, E Corbett, J Lee, M Lui, P Paterson, E AF Sayyar-Rodsari, B. Schweiger, C. Hartman, E. Corbett, J. Lee, M. Lui, P. Paterson, E. GP IEEE TI Parametric modeling of electron beam loss in synchrotron light sources SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Synchrotron light is used for a wide variety of scientific disciplines ranging from physical chemistry to molecular biology and industrial applications. As the electron beam circulates, random single-particle collisional processes lead to decay of the beam current in time. We report a simulation study in which a combined neural network (NN) and first-principles (FP) model is used to capture the decay in beam current due to Touschek, Bremsstrahlung and Coulomb effects. The FP block in the combined model is a parametric description of the beam current decay where model parameters vary as a function of beam operating conditions (e.g. vertical scraper position, RF voltage, number of the bunches, and total beam current). The NN block provides the parameters of the FP model and is trained (through constrained nonlinear optimization) to capture the variation in model parameters as operating condition of the beam changes. Simulation results will be presented to demonstrate that the proposed combined framework accurately models beam decay as well as variation to model parameters without direct access to parameter values in the model. C1 [Sayyar-Rodsari, B.; Schweiger, C.; Hartman, E.] Pavilion Technol Inc, Austin, TX 78759 USA. [Corbett, J.; Lee, M.; Lui, P.; Paterson, E.] SLAC, Menlo Pk, CA 94025 USA. RP Sayyar-Rodsari, B (reprint author), Pavilion Technol Inc, Austin, TX 78759 USA. EM bijan@pavtech.com FU DOE STTR [DE-FG02-04ER86225]; DOE-Stanford [DE-AC02-76SF00515] FX Work supported by DOE STTR Grant DE-FG02-04ER86225 and DOE-Stanford contract DE-AC02-76SF00515. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 343 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300115 ER PT B AU Miyamoto, R Kopp, SE Jannson, A Syphers, MJ AF Miyamoto, R. Kopp, S. E. Jannson, A. Syphers, M. J. GP IEEE TI Geometrical interpretation of nonlinearities from a cylindrical pick-up SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In many accelerators, cylindrical pick-ups are used to measure transverse beam positions. Theoretically, signals from these pick-ups are related to infinite power series of the beam position but, in practice, only finite number of terms are considered and the position measurements degrade when a beam is far from the center of a pick-up. This paper shows there is actually a simple geometrical relation between a beam position and induced signals. With help of the geometrical relation, the beam position can be written in a compact function of signals. The paper is concluded with numerical simulations and a test to show this geometry based expression can calculate a beam position better than the conventional methods. C1 [Miyamoto, R.; Kopp, S. E.] Univ Texas Austin, Austin, TX 78712 USA. [Jannson, A.; Syphers, M. J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Miyamoto, R (reprint author), Univ Texas Austin, Austin, TX 78712 USA. FU Fermilab Research Alliance; LLC [DE-AC02-07CH11359]; United States Department of Energy FX Work supported by Fermilab Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 346 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300116 ER PT B AU Miyamoto, R Kopp, SE Jannson, A Syphers, MJ AF Miyamoto, R. Kopp, S. E. Jannson, A. Syphers, M. J. GP IEEE TI Tevatron AC dipole system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The AC dipole is an oscillating dipole magnet which can induce large amplitude oscillations without the emittance growth and decoherence. These properties make it a good tool to measure optics of a hadron synchrotron. The vertical AC dipole for the Tevatron is powered by an inexpensive high power audio amplifier since its operating frequency is approximately 20 kHz. The magnet is incorporated into a parallel resonant system to maximize the current. The use of a vertical pinger magnet which has been installed in the Tevatron made the cost relatively inexpensive. Recently, the initial system was upgraded with a more powerful amplifier and oscillation amplitudes up to 2-3 sigma were achieved with the 980 GeV proton beam. This paper discusses details of the Tevatron AC dipole system and also shows its test results. C1 [Miyamoto, R.; Kopp, S. E.] Univ Texas Austin, Austin, TX 78712 USA. [Jannson, A.; Syphers, M. J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Miyamoto, R (reprint author), Univ Texas Austin, Austin, TX 78712 USA. FU Fermilab Research Alliance; LLC [DE-AC02-07CH11359]; United States Department of Energy FX Work supported by Fermilab Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 349 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300117 ER PT B AU Alexahin, Y AF Alexahin, Y. GP IEEE TI Optimization of the helical orbits in the Tevatron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To avoid multiple head-on collisions the proton and antiproton beams in the Tevatron move along separate helical orbits created by 7 horizontal and 8 vertical electrostatic separators. Still the residual long-range beam-beam interactions can adversely affect particle motion at all stages from injection to collision. With increased intensity of the beam it became necessary to modify the orbits in order to mitigate the beam-beam effect on both antiprotons and protons. This report summarizes the work done on optimization of the Tevatron helical orbits, outlines the applied criteria and presents the achieved results. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Alexahin, Y (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 352 EP 354 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300118 ER PT B AU Semenov, A Carneiro, JP Kamerdzhiev, V Lebedev, V AF Semenov, A. Carneiro, J. -P. Kamerdzhiev, V. Lebedev, V. GP IEEE TI Status of the FNAL digital tune monitor SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We have implemented a real-time method for bunch-by-bunch betatron tune measurements in the TEVATRON based on 16 bit 100 MHz ADC. To increase the betatron signal level from a pick-up we have used a modified version of Direct Diode Detector method combined with fast FPGA algorithm and a feedback loop utilizing a 14 bit DAC for suppression of low frequency beam motion. A description of this device is presented in this paper together with first results. C1 [Semenov, A.; Carneiro, J. -P.; Kamerdzhiev, V.; Lebedev, V.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Semenov, A (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM carneiro@fnal.gov; vsevolod@fnal.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 355 EP 357 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300119 ER PT B AU Jansson, A Bowie, K Fitzpatrick, T Kwarciany, R Lundberg, C Slimmer, D Valerio, L Zagel, J AF Jansson, A. Bowie, K. Fitzpatrick, T. Kwarciany, R. Lundberg, C. Slimmer, D. Valerio, L. Zagel, J. GP IEEE TI IPM measurements in the Tevatron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Two Ionization Profile Monitors (IPMs) were installed in the Tevatron in 2006. The detectors are capable of resolving single bunches turn-by-turn. This paper presents recent improvements to the system hardware and its use for beam monitoring. In particular, the correction of beam size oscillations observed at injection is discussed. C1 [Jansson, A.; Bowie, K.; Fitzpatrick, T.; Kwarciany, R.; Lundberg, C.; Slimmer, D.; Valerio, L.; Zagel, J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Jansson, A (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM jansson@fnal.gov NR 3 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 358 EP 360 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300120 ER PT B AU Snopok, P Berz, M Johnstone, C AF Snopok, Pavel Berz, Martin Johnstone, Carol GP IEEE TI Calculating the nonlinear tune shifts with amplitude using measured BPM data SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An algorithm is proposed to calculate the approximate tune shifts with amplitude using only the linear transfer map of a circular accelerator and with little or no information on higher order nonlinearities. To extract information about the nonlinear dynamics, the decay rate of the average amplitude of the particle distribution after an instantaneous transversal kick is used. This method works when strong, low-order resonances are not present, that is where the linear lattice rather than the nonlinear driving terms dominates the machine dynamics. Nonlinear normal form transformation and differential algebra methods are employed to establish the connection between measurement results and the nonlinear tune shifts with amplitude. Proposed algorithm is applicable to a wide range of circular accelerators. C1 [Snopok, Pavel] SPbSU, St Petersburg, Russia. [Berz, Martin] MSU, E Lansing, MI USA. [Johnstone, Carol] Fermi Lab, Batavia, IL USA. RP Snopok, P (reprint author), SPbSU, St Petersburg, Russia. EM snopok@gmail.com; berz@msu.edu; cjj@fnal.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 361 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300121 ER PT B AU Ng, KY AF Ng, K. Y. GP IEEE TI Electron cloud in the Fermilab Booster SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Simulations of the Fermilab Booster reveal a substantial electron-cloud buildup both inside the unshielded combined-function magnets and the beam pipes joining the magnets, when the second-emission yield (SEY) is larger than similar to 1.6. The implication of the electron-cloud effects on space charge and collective instabilities of the beam is discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ng, KY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM ng@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 364 EP 366 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300122 ER PT B AU Ruan, J Edwards, H Tan, CY Thurman-Keup, R Scarpine, V Li, Y Power, J Maxwell, T AF Ruan, J. Edwards, H. Tan, Cheng-Yang Thurman-Keup, R. Scarpine, V. Li, Y. Power, John Maxwell, Tim GP IEEE TI Design of an electro-optical sampling experiment at the AWA facility SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The free space electro-optical (EO) sampling technique is a powerful tool for analyzing the longitudinal charge density of an ultrashort e-beam. In this paper, we present (i) experimental results for a laser-based mock-up of the EO experiment [1] and (ii) a design for a beam-based, single-shot, EO sampling experiment using the e-beam from the Argonne Wakefield Accelerator (AWA) RF photoinjector. For the mock-up, a tabletop terahertz experiment is conducted in the AWN laser room. The mock-up uses an IR beam incident on < 110 > ZnTe crystal to produce a THz pulse via optical rectification. Detection is based on the cross correlation between the THz field and the probe IR laser field in a second < 110 > ZnTe crystal. C1 [Ruan, J.; Edwards, H.; Tan, Cheng-Yang; Thurman-Keup, R.; Scarpine, V.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Li, Y.; Power, John] Argonne Natl Lab, Argonne, IL 60439 USA. [Maxwell, Tim] Northern Illinois Univ, De Kalb, IL 60115 USA. RP Ruan, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. FU Fermi Research Alliance LLC [DE-AC0207CH11359]; DOE [DE-FG0206ER41435] FX This work is supported by Fermi Research Alliance LLC. under DE-AC0207CH11359 with the U.S. DOE. T. M. is supported by DOE under Contract No. DE-FG0206ER41435 with NIU. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 367 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300123 ER PT B AU Tan, CY AF Tan, C. Y. GP IEEE TI Chromaticity tracking using a phase modulation technique SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In the classical chromaticity measurement technique, chromaticity is measured by measuring the change in betatron tune as the the RF frequency is varied. This paper will describe a novel way of measuring chromaticity: we win phase modulate the RF with a known sine wave and then phase demodulate the betatron frequency. The result is a line in Fourier space which corresponds to the frequency of our sine wave modulation. The peak of this sine wave is proportional to chromaticity. For this technique to work, a tune tracker PLL system is required because it supplies the betatron carrier frequency. This method has been tested in the Tevatron and we will show the results here. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Tan, CY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cytan@fnal.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 370 EP 372 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300124 ER PT B AU Tan, CY Ranjbar, VH AF Tan, C. Y. Ranjbar, V. H. GP IEEE TI Chromaticity measurement using a continuous head-tail kicking technique SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In the classical head-tail chromaticity measurement technique, a single large kick is applied transversely to the beam. The resulting phase difference between the head and the tail is measured and the chromaticity extracted. In the continuous head-tail kicking technique, a very small transverse kick is applied to the beam and the asymptotic phase difference between the head and the tail is found to be a function of chromaticity. The advantage of this method is that since the tune tracker PLL already supplies the small transverse kicks, no extra modulation is required. C1 [Tan, C. Y.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Ranjbar, V. H.] Tech X, Boulder, CO 80303 USA. RP Tan, CY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cytan@fnal.gov; ranibar@txcorp.com FU Fermi Research Alliance, LLC [DE-AC02-07CH11359]; United States Department of Energy; US-LARP FX Work supported by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy, and US-LARP. NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 373 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300125 ER PT B AU Valishev, A Annala, G Lebedev, V Moore, RS AF Valishev, A. Annala, G. Lebedev, V. Moore, R. S. GP IEEE TI Correction of second order chromaticity at Tevatron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Correction of the second order betatron tune chromaticity is essential for operation at the working point near half integer resonance which is proposed as one of the ways to improve performance of the Tevatron. In this report the new chromaticity correction scheme with split sextupole families is described. Details of implementation and commissioning at the present working point are discussed. C1 [Valishev, A.; Annala, G.; Lebedev, V.; Moore, R. S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Valishev, A (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM valishev@fnal.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 376 EP 378 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300126 ER PT B AU Yang, MJ Crisp, J Prieto, P AF Yang, M. J. Crisp, J. Prieto, P. GP IEEE TI A BPM calibration procedure using TBT data SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Accurate BPM calibration is crucial for lattice analysis. It is also reassuring when the calibration can be independently verified. This paper outlines a procedure that can extract BPM calibration information from TBT orbit data. The procedure is developed as an extension to the Turn-By-Turn lattice analysis [1]. Its application to data from both Recycler Ring and Main Injector (MI) at Fermilab have produced very encouraging results. Some specifics in hardware design will be mentioned to contrast that of analysis results. C1 [Yang, M. J.; Crisp, J.; Prieto, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Yang, MJ (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM yang@fnal.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 379 EP 381 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300127 ER PT B AU Yang, MJ AF Yang, M. J. GP IEEE TI Magnetic error analysis of recycler PBAR injection transfer line SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Detailed study of Fermilab Recycler Ring anti-proton injection line became feasible with its BPM system upgrade, though the beamline has been in existence and operational since year 2000. Previous attempts were not fruitful due to limitations in the BPM system. Among the objectives are the assessment of beamline optics and the presence of error fields. In particular the field region of the permanent Lambertson magnets at both ends of R22 transfer line will be scrutinized. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Yang, MJ (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM yang@fnal.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 382 EP 384 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300128 ER PT B AU Bieniosek, FM Leitner, M AF Bieniosek, F. M. Leitner, M. GP IEEE TI 1-mev electrostatic ion energy analyzer SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID MULTIPOLES; OPTICS AB We describe a high-resolution 90-degree cylindrical electrostatic energy analyzer for 1-MeV (singly ionized) heavy ions for experiments in the Heavy Ion Fusion Science Virtual National Laboratory (HIFS-VNL). By adding a stripping cell, the energy reach of the analyzer can be extended to 2 MeV. This analyzer has high dispersion in a first-order focus with bipolar deflection-plate voltages in the range of 50 kV. We present calculations of vacuum-field beam trajectories, space-charge effects, field errors, and a multipole corrector. The corrector consists of 12 rods arranged in a circle around the beam. Such a corrector has excellent properties as an electrostatic quadrupole, sextupole, or linear combination. The improved energy diagnostic will allow measurements of beam energy spread, such as caused by charge exchange or temperature anisotropy, and better understanding of experimental results in planned longitudinal beam studies. Examples for such experiments include investigations of a beam patching pulser to correct errors in the head and tail of the transported beam bunch, and energy errors derived from ripples in the injector voltage waveform. C1 [Bieniosek, F. M.; Leitner, M.] LBNL, Berkeley, CA 94720 USA. RP Bieniosek, FM (reprint author), LBNL, Berkeley, CA 94720 USA. EM fmbieniosek@lbl.gov NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 385 EP 387 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300129 ER PT B AU Byrd, J De Santis, S Sonnad, K Pivi, M AF Byrd, J. De Santis, S. Sonnad, K. Pivi, M. GP IEEE TI Measurements of the propagation of EM waves through the vacuum chamber of the PEP-II low energy ring for beam diagnostics SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the results of our measurements of the electron cloud density in the PEP-II low energy ring (LER) by propagating a TE wave into the beam pipe. By connecting a signal generator to a beam position monitor button we can excite a signal above the vacuum chamber cut-off frequency and measure its propagation through the beam pipe with a spectrum analyzer connected to another button about 50 meters away. The measurement can be performed with different beam conditions and also at different settings of the solenoids used to reduce the build up of electrons. The presence of a modulation in the TE wave transmission, synchronous with the beam revolution frequency, which appear to increase in depth when the solenoids are switched off, seem to be directly correlated to the electron cloud density in the region between the two BPM's. In this paper we present and discuss the measurements taken in the Interaction Region 12 straight of the LER during 2006 and the first part of 2007. C1 [Byrd, J.; De Santis, S.; Sonnad, K.] LBNL, Berkeley, CA USA. [Pivi, M.] SLAC, Menlo Pk, CA USA. RP Byrd, J (reprint author), LBNL, Berkeley, CA USA. EM sdesantis@lbl.gov FU U.S. Department of Energy [DE-AC0-05CH11231] FX Work supported by the U.S. Department of Energy under Contract No. DE-AC0-05CH11231. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 388 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300130 ER PT B AU Byrd, J De Santis, S Wilcox, R Yin, Y AF Byrd, J. De Santis, S. Wilcox, R. Yin, Y. GP IEEE TI Optical beam timing monitor experiments at the advanced light source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the initial results of an experimental study of a beam timing monitor based on an optoelectronic technique. This technique uses the electrical signal from a beam position monitor to modulate the amplitude of a train of laser pulses, converting timing jitter into an amplitude jitter. This modulation is then measured with a photodetector and sampled by a fast ADC. This approach has already demonstrated sub-100 fs resolution and promises even better results. Additionally, we are planning to use the technique as a way to extract the maximum possible bandwidth from a BPM, avoiding the dispersion typical of long RF cables. We show our initial results using signals from the Advanced Light Source storage ring. C1 [Byrd, J.; De Santis, S.; Wilcox, R.] LBNL, Berkeley, CA USA. [Yin, Y.] YYLabs, Fremont, CA USA. RP Byrd, J (reprint author), LBNL, Berkeley, CA USA. EM sdesantis@lbl.gov FU U.S. Department of Energy [DE-AC0-05CH11231] FX Work supported by the U.S. Department of Energy under Contract No. DE-AC0-05CH11231. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 391 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300131 ER PT B AU Huang, G Byrd, JM Feng, J Qiang, J Wan, W AF Huang, G. Byrd, J. M. Feng, J. Qiang, J. Wan, W. GP IEEE TI Progress on modeling of ultrafast X-ray streak cameras SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Streak cameras continue to be useful tools for studying phenomena on the picoseconds time scale. We have employed accelerator modeling tools to understand and possibly improve the time resolution of present and future streak cameras. This effort has resulted in an end-to-end model of the camera. This model has contributed to the recent measurement of 230 fsec (FWHM) resolution measured at 266 nm in the Advanced Light Source Streak Camera Laboratory. We describe results front this model that show agreement with the experiments. We also extrapolate the performance of this camera including several possible improvements. C1 [Huang, G.; Byrd, J. M.; Feng, J.; Qiang, J.; Wan, W.] LBNL, Berkeley, CA 94720 USA. RP Huang, G (reprint author), LBNL, Berkeley, CA 94720 USA. EM ghuag@lbl.gov RI Huang, Gang/I-7772-2013 NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 394 EP 396 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300132 ER PT B AU Qiang, J Byrd, JM Feng, J Huang, G AF Qiang, J. Byrd, J. M. Feng, J. Huang, G. GP IEEE TI Streak camera temporal resolution improvement using a time-dependent field SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Streak camera is an important diagnostic device in the studies of laser plasma interaction, the detailed structure of photo reaction from material science to biochemistry, and in the measurement of the longitudinal distribution of a beam in accelerators. In this paper, we report on a new method which can potentially improve the temporal resolution of a streak camera down to femtoseconds. This method uses a time-dependent acceleration field to defocus the photo electrons longitudinally. This not only reduces the time dispersion distortion caused by initial energy spread but also mitigates the effects from the space-charge forces of photo electrons. An illustration of the method shows significant improvement of the modulation transfer function (MFT) compared with the conventional design. C1 [Qiang, J.; Byrd, J. M.; Feng, J.; Huang, G.] LBNL, Berkeley, CA 94720 USA. RP Qiang, J (reprint author), LBNL, Berkeley, CA 94720 USA. EM jqiang@lbl.gov NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 397 EP 399 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300133 ER PT B AU Qiang, J Fischer, W Sen, T AF Qiang, J. Fischer, W. Sen, T. GP IEEE TI Strong-strong simulation of long-range beam-beam effects at RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Long-range beam-beam interactions can cause significant degradation of beam quality and lifetime in high energy ring colliders. In this paper, we report on numerical simulation of the long-range beam-beam interactions at RHIC using a parallel strong-strong particle-in-cell code, BeamBeam3D. The simulation includes nonlinearities from both the beam-beam interactions and the arc sextupoles. Scan studies in tune space show strong emittance growth islands around 7th and 11th order resonances. The large emittance growth inside the resonance island is driven by the dynamic tune modulation together with the nonlinear forces from beam-beam interactions and sextupole magnet. The emittance growth decreases quickly as the beam-beam separation increases from four to six sigmas. C1 [Qiang, J.] LBNL, Berkeley, CA 94720 USA. [Fischer, W.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Sen, T.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Qiang, J (reprint author), LBNL, Berkeley, CA 94720 USA. EM jqiang@lbl.gov FU Science, U. S. Department of Energy [DE-AC02-05CH11231] FX Work supported by the of Science, U. S. Department of Energy, under Contract No. DE-AC02-05CH11231 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 400 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300134 ER PT B AU Sonnad, KG Furinan, M Vay, JL Venturini, M Celata, CM Grote, D AF Sonnad, Kiran G. Furinan, Miguel Vay, Jean-Luc Venturini, Marco Celata, Christine M. Grote, David GP IEEE TI Simulations of electron cloud effects on the beam dynamics for the FNAL main injector upgrade SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Fermilab main injector (MI) is being considered for an upgrade as part of the high intensity neutrino source (HINS) effort. This upgrade will involve a significant increasing of the bunch intensity relative to its present value. Such an increase will place the MI in a regime in which electron-cloud effects are expected to become important. We have used the electrostatic particle-in-cell code WARP, recently augmented with new modeling capabilities and simulation techniques, to study the dynamics of beam-electron cloud interaction. This work in progress involves a systematic assessment of beam instabilities due to the presence of electron clouds. C1 [Sonnad, Kiran G.; Furinan, Miguel; Vay, Jean-Luc; Venturini, Marco; Celata, Christine M.] LBNL, Berkeley, CA 94720 USA. [Grote, David] LLNL, Livermore, CA USA. RP Sonnad, KG (reprint author), LBNL, Berkeley, CA 94720 USA. FU U.S. DOE [DE-AC02-05CH11231] FX Work supported by the U.S. DOE under Contract no. DE-AC02-05CH11231 NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 403 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300135 ER PT B AU Weber, J Chin, M Timossi, C Williams, E AF Weber, J. Chin, M. Timossi, C. Williams, E. GP IEEE TI ALS Mini IOC: An FPGA embedded processor based control system module for booster magnet ramping at the ALS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Light Source (ALS) booster magnet upgrade for top-off operation [1] requires new instrumentation to meet increased magnet ramping requirements. To address these requirements, the ALS Instrumentation group and Control Systems group collaborated to design a new control system module called the Mini IOC. The Mini IOC hardware is based on a commercial evaluation board containing an FPGA with embedded processor and built-in interfaces for 64MB of DDR SDRAM and Ethernet. A custom module is used for analog controls and monitors. The PowerPC (R) embedded processor runs an EPICS [2] database built on the VxWorks operating system allowing remote access via Ethernet. This paper includes an overview of the Mini IOC design and operational results. C1 [Weber, J.; Chin, M.; Timossi, C.; Williams, E.] LBNL, Berkeley, CA 94720 USA. RP Weber, J (reprint author), LBNL, Berkeley, CA 94720 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 406 EP 408 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300136 ER PT B AU Shkvarunets, AG Fiorito, RB O'Shea, PG Power, JG Conde, ME Gei, W AF Shkvarunets, A. G. Fiorito, R. B. O'Shea, P. G. Power, J. G. Conde, M. E. Gei, Wei GP IEEE TI Optical diffraction-dielectric foil radiation interferometry diagnostic for low energy beams SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We have developed and used a novel optical diffraction-dielectric foil radiation interferometer to measure the divergence of the low energy (8 - 14 MeV) ANL-AWA electron beam. Our interferometer employs an electro-formed micromesh first foil to overcome the inherent limitation due to scattering in the solid first foil of a conventional OTR interferometer (OTRI) and an optically transparent dielectric foil. The interferences of forward directed optical diffraction radiation (ODR) from the mesh and radiation from the dielectric foil is observed in transmission. This geometry allows a small gap between the foils (1 - 2 mm), which is required to observe fringes from two foils at low beam energies. Our measurements indicate that a single Gaussian distribution is sufficient to describe the angular phase space of the measured beam. C1 [Shkvarunets, A. G.; Fiorito, R. B.; O'Shea, P. G.] Univ Maryland, IREAP, College Pk, MD 20742 USA. [Power, J. G.; Conde, M. E.; Gei, Wei] Argonne Natl Lab, Argonne, IL 60439 USA. RP Shkvarunets, AG (reprint author), Univ Maryland, IREAP, College Pk, MD 20742 USA. EM shkvar@umd.edu FU ONR; DOD Joint Technology Office FX Research sponsored by ONR and the DOD Joint Technology Office. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 415 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300139 ER PT B AU Maxwell, TJ Bohn, CL Mihalcea, D Piot, P AF Maxwell, T. J. Bohn, C. L. Mihalcea, D. Piot, P. GP IEEE TI Vector diffraction theory and coherent transition radiation interferometry in electron linacs SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Electrons impinging on a thin metallic foil produce small bursts of transition radiation (TR) as they cross the boundary from one medium to the next. A popular diagnostic application is found for compact electron bunches. In this case they will emit radiation more or less coherently with an enhancement of the intensity on wavelengths comparable to or larger than the bunch size, generating coherent transition radiation (CTR). Several detailed analytical descriptions have been proposed for describing the resulting spectral distribution, often making different simplifying assumptions. Given that bunches tenths of millimeters long can generate measurable spectra into the millimeter range, concern may arise as to weak diffraction effects produced by optical interference devices containing elements with dimensions in the centimeter range. C1 [Maxwell, T. J.; Bohn, C. L.; Mihalcea, D.; Piot, P.] Northern Illinois Univ, De Kalb, IL 60115 USA. [Piot, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Maxwell, TJ (reprint author), Northern Illinois Univ, De Kalb, IL 60115 USA. FU US. Department of Energy [DE-FG02-06ER41435]; Northern Illinois University FX Work supported by US. Department of Energy, under Contract No. DE-FG02-06ER41435 with Northern Illinois University NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 418 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300140 ER PT B AU Rihaoui, M Bohn, CL Piot, P Power, JG AF Rihaoui, M. Bohn, C. L. Piot, P. Power, J. G. GP IEEE TI Impact of transverse irregularities at the photocathode on the production of high-charge electron bunches SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The properties of electron beams produced in a photoinjector are strongly dependent on the initial conditions, i.e. the photocathode drive laser shape and its uniformity. We explore the impact of well-defined transverse laser perturbations on the evolution of the electron beam both in configuration and velocity spaces and especially investigate how certain types of perturbations evolve as the beam propagates in the Argonne Wakefield Accelerator facility. Numerical simulations performed with IMPACT-T are presented. Finally preliminary experimental results aimed at validating our simulations are discussed. C1 [Rihaoui, M.; Bohn, C. L.; Piot, P.] Northern Illinois Univ, De Kalb, IL 60115 USA. [Piot, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Power, J. G.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Rihaoui, M (reprint author), Northern Illinois Univ, De Kalb, IL 60115 USA. FU U.S. Department of Energy [DE-FG02-04ER41323]; Northern Illinois University FX Work supported by U.S. Department of Energy under Contract No. DE-FG02-04ER41323 with Northern Illinois University. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 424 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300142 ER PT B AU Tang, V Brown, C Houck, T AF Tang, V. Brown, C. Houck, T. GP IEEE TI Characterization of a high current induction accelerator electron beam via optical transition radiation from dielectric foils SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Traditionally, thin metal foils are employed for optical transition radiation (OTR) beam diagnostics but the possibility of shorting accelerator insulating surfaces and modifying accelerating fields are concerns. The successful utilization of dielectric foils in place of metal ones could alleviate these issues but necessitates more understanding of the OTR data for inferring desired beam parameters because of the dielectric's finite permittivity. Additionally, the temperature dependence of the relevant foil parameters due to beam heating should be accounted for. Here, we present and discuss sample synthetic diagnostic results of Kapton OTR spot-size measurements from the Flash X-Ray (FXR) accelerator Which studies these and sightline effects. These simulations show that in some cases, the observed spot-sizes and radii are noticeably larger than the beam radii. C1 [Tang, V.; Brown, C.; Houck, T.] LLNL, Livermore, CA 94551 USA. RP Tang, V (reprint author), LLNL, Livermore, CA 94551 USA. EM tang23@llnl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 454 EP 456 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300152 ER PT B AU Walston, S Chung, C Fitsos, P Gronberg, J Ross, M Khainovski, O Kolomensky, Y Loscutoff, P Slater, M Thomson, M Ward, D Boogert, S Vogel, V Meller, R Lyapin, A Malton, S Miller, D Frisch, J Hinton, S May, J McCormick, D Smith, S Smith, T White, G Orimoto, T Hayano, H Honda, Y Terunuma, N Urakawa, J AF Walston, S. Chung, C. Fitsos, P. Gronberg, J. Ross, M. Khainovski, O. Kolomensky, Y. Loscutoff, P. Slater, M. Thomson, M. Ward, D. Boogert, S. Vogel, V. Meller, R. Lyapin, A. Malton, S. Miller, D. Frisch, J. Hinton, S. May, J. McCormick, D. Smith, S. Smith, T. White, G. Orimoto, T. Hayano, H. Honda, Y. Terunuma, N. Urakawa, J. GP IEEE TI Resolution of a high performance cavity beam position monitor system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved - ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. A metrology system for the three BPMs was recently installed. This system employed optical encoders to measure each BPM's position and orientation relative to a zero-coefficient of thermal expansion carbon fiber frame and has demonstrated that the three BPMs behave as a rigid-body to less than 5 nm. To date, we have demonstrated a BPM resolution of less than 20 nm over a dynamic range of +/- 20 microns. C1 [Walston, S.; Chung, C.; Fitsos, P.; Gronberg, J.] LLNL, Livermore, CA USA. [Ross, M.] FNAL, Batavia, IL USA. [Khainovski, O.; Kolomensky, Y.; Loscutoff, P.] LBNL, Berkeley, CA USA. [Slater, M.; Thomson, M.; Ward, D.] Univ Cambridge, Cambridge, England. [Boogert, S.] Univ London, Royal Holloway, Egham, Surrey, England. [Vogel, V.] DESY, Hamburg, Germany. [Meller, R.] Cornell Univ, Ithaca, NY USA. [Lyapin, A.; Malton, S.; Miller, D.] UCL, London, England. [Frisch, J.; Hinton, S.; May, J.; McCormick, D.; Smith, S.; Smith, T.; White, G.] SLAC, Menlo Pk, CA USA. [Orimoto, T.] CALTECH, Pasadena, CA 91125 USA. [Hayano, H.; Honda, Y.; Terunuma, N.; Urakawa, J.] KEK, Tsukuba, Ibaraki, Japan. RP Walston, S (reprint author), LLNL, Livermore, CA USA. EM walston2@llnl.gov FU U.S. Department of Energy [W-7405-Eng-48]; University of California Lawrence Berkeley National Laboratory [DE-FG02-03ER41279]; Stanford Linear Accelerator Center [DE-AC02-76SF00515]; National Science Foundation; Japan-USA Collaborative Research; Japan Society for the Promotion of Science; Commission of the European Communities under the 6th Framework Programme [RIDS-011899] FX This work was performed under the auspices of the U.S. Department of Energy by Univeristy of California Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48, by University of California Lawrence Berkeley National Laboratory under contract No. DE-FG02-03ER41279, and by the Stanford Linear Accelerator Center under contract No. DE-AC02-76SF00515. This work was supported by the National Science Foundation, by the Japan-USA Collaborative Research Grant, Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science, and by the Commission of the European Communities under the 6th Framework Programme Structuring the European Research Area, contract number RIDS-011899. NR 6 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 457 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300153 ER PT B AU Blind, B Gilpatrick, JD AF Blind, Barbara Gilpatrick, J. Douglas GP IEEE TI LANSCE-linac beam-centroid jitter in transverse phase space SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In order to characterize the beam-centroid jitter in transverse phase space, sets of position data of the 100-MeV H(+) beam and 800-MeV H(-) beam were taken in the transport lines of the Los Alamos Neutron Science Center (LANSCE) accelerator complex. Subsequent data evaluation produced initially puzzling inconsistencies in the phase-space plots from different pairs of beam-position monitors (BPMs). It is shown that very small random measurement errors will produce systematic differences between plots that should nominally be identical. The actual beam-centroid jitter and rms BPM measurement errors can be deduced from the data, and simulations can validate the deductions. The phase-space plots can also reveal the presence of problem beamline components. Examples will be shown. C1 [Blind, Barbara; Gilpatrick, J. Douglas] LANL, Los Alamos, NM 87545 USA. RP Blind, B (reprint author), LANL, Los Alamos, NM 87545 USA. EM bblind@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 460 EP 462 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300154 ER PT B AU Gilpatrick, JD Blind, B Borden, M Erickson, J McCrady, R Gulley, MS Kurennoy, S O'Hara, J Oothoudt, M Pillai, C Power, J Rybarcyk, L Shelley, R AF Gilpatrick, J. D. Blind, B. Borden, M. Erickson, J. McCrady, R. Gulley, M. S. Kurennoy, S. O'Hara, J. Oothoudt, M. Pillai, C. Power, J. Rybarcyk, L. Shelley, R. GP IEEE TI Proposed beam diagnostics instrumentation for the LANSCE refurbishment project SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Presently, the Los Alamos National Laboratory is in the process of planning a refurbishment of various subsystems within its Los Alamos Neutron Science Center accelerator facility. A part of this LANSCE facility refurbishment will include some replacement of and improvement to existing older beam-diagnostics instrumentation. While plans are still being discussed, some instrumentation that is under improvement or replacement consideration are beam phase and position measurements within the 805-MHz side-coupled cavity linac, slow wire profile measurements, typically known as wire scanners, and possibly additional installation of fast ionization-chamber loss monitors. This paper will briefly describe the requirements for these beam measurements, what we have done thus far to answer these requirements, and some of the technical issues related to the implementation of the instrumentation. C1 [Gilpatrick, J. D.; Blind, B.; Borden, M.; Erickson, J.; McCrady, R.; Gulley, M. S.; Kurennoy, S.; O'Hara, J.; Oothoudt, M.; Pillai, C.; Power, J.; Rybarcyk, L.; Shelley, R.] LANL, Los Alamos, NM 87545 USA. RP Gilpatrick, JD (reprint author), LANL, Los Alamos, NM 87545 USA. EM gilpatrick@lanl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 463 EP 465 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300155 ER PT B AU Gilpatrick, JD Blind, B Gulley, MS Pillai, C Power, J AF Gilpatrick, J. D. Blind, B. Gulley, M. S. Pillai, C. Power, J. GP IEEE TI H(+)- and H(-)-beam position and current jitter at LANSCE SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB During the CY2005 and CY2006 Los Alamos Neutron Science Center (LANSCE) beam runs, beam-development shifts were performed in order to acquire and analyze beam-current and beam-position jitter data for both the LANSCE H(+) and H(-) beams. These data were acquired using three beam-position monitors (BPMs) from the 100-MeV Isotope Production Facility (IPF) beam line and three BPMs from the Switchyard (SY) transport line at the end of the LANSCE 800-MeV linac. The two types of data acquired, intermacropulse and intramacropulse, were analyzed for statistical and frequency characteristics as well as various other correlations including comparing their phase-space characteristics in a coordinate system of transverse angle versus transverse position. This paper will briefly describe the measurements required to acquire these jitter data, the analysis of these data, and some interesting implications to beam operation. C1 [Gilpatrick, J. D.; Blind, B.; Gulley, M. S.; Pillai, C.; Power, J.] LANL, Los Alamos, NM 87545 USA. RP Gilpatrick, JD (reprint author), LANL, Los Alamos, NM 87545 USA. EM gilpatrick@lanl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 466 EP 468 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300156 ER PT B AU Kurennoy, SS AF Kurennoy, Sergey S. GP IEEE TI Electromagnetic modeling of beam position and phase monitors for the LANSCE linac SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Electromagnetic modeling has been used to compare designs of pickups for the beam position and phase monitors (BPPM) for the Los Alamos Neutron Science Center (LANSCE) linac. This study is a part of the efforts to upgrade LANSCE beam diagnostics [1]. MAFIA 3-D time-domain simulations with an ultra-relativistic beam allow computing the signal amplitudes and phases on the BPPM electrodes for the given processing frequency, 201.25 MHz, as functions of the beam transverse position. An analytical model can be applied to extrapolate the simulation results to lower beam velocities. Based on modeling results, a BPPM design with 4 one-end-shorted electrodes each covering 60-degree subtended angle, similar to the SNS linac BPPM [2], appears to provide the best combination of mechanical and diagnostics properties for the LANSCE side-coupled linac. C1 LANL, Los Alamos, NM 87545 USA. RP Kurennoy, SS (reprint author), LANL, Los Alamos, NM 87545 USA. EM kurennoy@lanl.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 469 EP 471 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300157 ER PT B AU O'Hara, JF Macek, RJ Browman, AA Borden, MJ Ledford, JE Gillespie, NA Martinez, D McKeown, KG Olivas, FR AF O'Hara, J. F. Macek, R. J. Browman, A. A. Borden, M. J. Ledford, J. E. Gillespie, N. A. Martinez, D. McKeown, K. G. Olivas, F. R. GP IEEE TI PSR Electron Cloud Detector and suppressor mechanical design and fabrication SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In order to better understand the two stream e-p instability issue in the LANSCE Proton Storage Ring (PSR), a new diagnostic instrument has been developed to measure the electron cloud formation and trapping in a quadrupole magnet at the LANSCE PSR. The device called the Electron Cloud Detector (ECD) was fabricated and has successfully been installed in the PSR. Along with the Electron Cloud Detector, an additional device was developed to manipulate electrons ejected from the quadrupole and allow additional information to be obtained from ECD measurements. This paper will discuss the mechanical design and fabrication issues encountered during the course of developing both devices. C1 [O'Hara, J. F.; Macek, R. J.; Browman, A. A.; Borden, M. J.; Ledford, J. E.; Gillespie, N. A.; Martinez, D.; McKeown, K. G.; Olivas, F. R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP O'Hara, JF (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM ohara@lanl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 472 EP 474 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300158 ER PT B AU O'Hara, JF Gilpatrick, JD Bruhn, DC Borden, MJ Erickson, JL Kurennoy, SS AF O'Hara, J. F. Gilpatrick, J. D. Bruhn, D. C. Borden, M. J. Erickson, J. L. Kurennoy, S. S. GP IEEE TI LANSCE prototype Beam Position and Phase Monitor (BPPM) mechanical design SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A prototype Beam Position and Phase Monitor (BPPM) beam line device is being designed to go in the LANSCE 805-MHz linear accelerator. The concept is to install two beam line devices in locations where their measurements can be compared with older existing Delta-T loop and wire scanner measurements. The purpose for the new devices is to measure the transverse position, angular trajectory, and central beam phase and energy of the LANSCE H+ and H- beam. The mechanical design of the new devices will combine features from previous LANL designs that were built for the LANSCE Isotope Production Facility, LANSCE Switchyard project, and those done for the SNS linear accelerator. This paper will discuss the mechanical design and fabrication issues encountered during the course of developing the BPPM. C1 [O'Hara, J. F.; Gilpatrick, J. D.; Bruhn, D. C.; Borden, M. J.; Erickson, J. L.; Kurennoy, S. S.] LANL, Los Alamos, NM USA. RP O'Hara, JF (reprint author), LANL, Los Alamos, NM USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 475 EP 477 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300159 ER PT B AU Ding, X Cline, D Babzien, M Kusche, KP Yakimenko, V Kimura, W Zhou, F AF Ding, X. Cline, D. Babzien, M. Kusche, K. P. Yakimenko, V. Kimura, W. Zhou, F. GP IEEE TI Generation and analysis of subpicosecond double electron bunch at the Brookhaven Accelerator Test Facility SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID RADIATION AB Two compressed electron beam bunches from a single 60-MeV bunch have been generated in a reproducible manner during compression in the magnetic chicane - "dog leg" arrangement at ATF. Measurements indicate they have comparable bunch lengths (similar to 100-200 fs) and are separated in energy by similar to 1.8 MeV with the higher-energy bunch preceding the lower-energy bunch by 0.5-1 ps [1]. Some simulation results for analyzing the double-bunch formation process are also presented. C1 [Ding, X.; Cline, D.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA. [Babzien, M.; Kusche, K. P.; Yakimenko, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Kimura, W.] STI Optron Inc, Bellevue, WA 98004 USA. [Zhou, F.] Stanford Linear Accelerat, Menlo Pk, CA 94025 USA. RP Ding, X (reprint author), Univ Calif Los Angeles, Los Angeles, CA 90095 USA. EM xding@bnl.gov FU Office of Sciences; U.S. Department of Energy FX Work supported by Office of Sciences, U.S. Department of Energy. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 478 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300160 ER PT B AU Venturini, M Bane, K Heifets, S Li, Z Ng, C Novokhatski, A Stupakov, G Warnock, R AF Venturini, M. Bane, K. Heifets, S. Li, Z. Ng, C. Novokhatski, A. Stupakov, G. Warnock, R. GP IEEE TI Impedance and single bunch instability calculations for the ILC damping rings SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An important action item for the damping rings of the International Linear Collider (ILC) is to compute the broad-band impedance and, from it, the threshold to the microwave instability. We report on the status of our study and provide a preliminary estimate of the instability threshold based on impedance models developed so far. C1 [Venturini, M.] LBNL, Berkeley, CA 94720 USA. [Bane, K.; Heifets, S.; Li, Z.; Ng, C.; Novokhatski, A.; Stupakov, G.; Warnock, R.] SLAC, Menlo Pk, CA USA. RP Venturini, M (reprint author), LBNL, Berkeley, CA 94720 USA. EM mventurini@lbl.gov; kbane@slac.stanford.edu FU DOE [DE-AC02-OSCH11231, DE-AC02-76SF00515] FX Work supported by DOE, Contracts no. DE-AC02-OSCH11231 and DE-AC02-76SF00515. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 484 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300162 ER PT B AU Zacherl, W Blumenfeld, I Hogan, MJ Ischebeck, R Clayton, C Muggli, P Zhou, M AF Zacherl, W. Blumenfeld, I. Hogan, M. J. Ischebeck, R. Clayton, C. Muggli, P. Zhou, M. GP IEEE TI Material effects and detector response corrections for bunch length measurements SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A typical diagnostic used to determine the bunch length of ultra-short electron bunches is the auto-correlation of coherent transition radiation. This technique can produce artificially short bunch length results due to the attenuation of low frequency radiation if corrections for the material properties of the Michelson interferometer and detector response are not made. Measurements were taken using FTIR spectroscopy to determine the absorption spectrum of various materials and the response of a Molectron P1-45 pyroelectric detector. The material absorption data will be presented and limitations on the detector calibration discussed. C1 [Zacherl, W.; Blumenfeld, I.; Hogan, M. J.; Ischebeck, R.] SLAC, Menlo Pk, CA 94025 USA. [Clayton, C.; Muggli, P.; Zhou, M.] Univ Calif Los Angeles, Los Angeles, CA USA. RP Zacherl, W (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM walter.zacherl@slac.stanford.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 487 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300163 ER PT B AU Corbett, J Huang, X Lee, M Lui, P Sayyar-Rodsari, B AF Corbett, J. Huang, X. Lee, M. Lui, P. Sayyar-Rodsari, B. GP IEEE TI Electron beam lifetime in SPEAR3: Measurement and simulation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we report on electron beam lifetime measurements as a function of scraper position, RF voltage and bunch fill pattern in SPEAR3. We then outline development of an empirical, macroscopic model using the beam-loss rate equation. By identifying the dependence of loss coefficients on accelerator and beam parameters, a numerically-integrating simulator can be constructed to compute beam decay with time. In a companion paper, the simulator is used to train a parametric, non-linear dynamics model for the system [1]. C1 [Corbett, J.; Huang, X.; Lee, M.; Lui, P.] SLAC, Menlo Pk, CA USA. [Sayyar-Rodsari, B.] Pavilion Technol Inc, Austin, TX USA. RP Corbett, J (reprint author), SLAC, Menlo Pk, CA USA. FU US Department of Energy [DE-AC03-76SF00515]; Office of Basic Energy Sciences; Division of Chemical Sciences FX Work supported by US Department of Energy Contract DE-AC03-76SF00515 and Office of Basic Energy Sciences, Division of Chemical Sciences. NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 490 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300164 ER PT B AU Fisher, AS Ecklund, S Field, RC Gierman, S Grossberg, P Krauter, K Miller, E Petree, M Sonnad, KG Spencer, N Sullivan, MK Underwood, KK Wienands, U AF Fisher, A. S. Ecklund, S. Field, R. C. Gierman, S. Grossberg, P. Krauter, K. Miller, E. Petree, M. Sonnad, K. G. Spencer, N. Sullivan, M. K. Underwood, K. K. Wienands, U. GP IEEE TI Commissioning the fast luminosity dither for PEP-II SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To maximize luminosity, a feedback system adjusts the relative transverse (x, y) position and vertical angle (y) of the electron and positron beams at the interaction point (IP) of PEP-II. The original system sequentially moved ("dithered") the electrons in four steps per coordinate. Communication with DC corrector magnets and field penetration through copper vacuum chambers led to a 9-s cycle time. Machine tuning can shift the beams at the IP, and so must be slowed to wait for the feedback. The new system simultaneously applies a small sinusoidal dither to all three coordinates at three frequencies. Air-core coils around stainless-steel chambers give rapid field penetration. A lock-in amplifier at each frequency detects the magnitude and phase of the luminosity's response. Corrections for all coordinates are applied by the same DC correctors used previously, but with only one adjustment per cycle for an expected nine-fold increase in speed. The commissioning of this system uncovered a sinusoidal vibration of the support for the IP that caused relative motion of the two beams and masked the y dither. Correcting this gave an immediate luminosity gain, and allowed for successful feedback commissioning. C1 [Fisher, A. S.; Ecklund, S.; Field, R. C.; Gierman, S.; Grossberg, P.; Krauter, K.; Miller, E.; Petree, M.; Sonnad, K. G.; Spencer, N.; Sullivan, M. K.; Underwood, K. K.; Wienands, U.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Fisher, AS (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM afisher@slac.stanford.edu NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 496 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300166 ER PT B AU Ischebeck, R Berry, M Blumenfeld, I Decker, FJ Hogan, MJ Iverson, RH Kirby, N Siemann, RH Walz, D Clayton, CE Huang, CK Joshi, C Lu, W Marsh, KA Mori, WB Zhou, MM Katsouleas, T Muggli, P Oz, E AF Ischebeck, Rasmus Berry, Melissa Blumenfeld, Ian Decker, Franz-Josef Hogan, Mark J. Iverson, Richard H. Kirby, Neil Siemann, Robert H. Walz, Dieter Clayton, Christopher E. Huang, Chengkun Joshi, Chandrashekhar Lu, Wei Marsh, Kenneth A. Mori, Warren B. Zhou, Miaomiao Katsouleas, Thomas Muggli, Patric Oz, Erdem GP IEEE TI Energy measurement in a plasma wakefield accelerator SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In the E-167 plasma wakefield acceleration experiment, electrons with an initial energy of 42 GeV are accelerated in a meter-scale lithium plasma. Particles are leaving plasma with a large energy spread. To determine the spectrum of the accelerated particles, a two-plane spectrometer has been set up. C1 [Ischebeck, Rasmus; Berry, Melissa; Blumenfeld, Ian; Decker, Franz-Josef; Hogan, Mark J.; Iverson, Richard H.; Kirby, Neil; Siemann, Robert H.; Walz, Dieter] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. [Clayton, Christopher E.; Huang, Chengkun; Joshi, Chandrashekhar; Lu, Wei; Marsh, Kenneth A.; Mori, Warren B.; Zhou, Miaomiao] Univ Calif Los Angeles, Los Angeles, CA USA. [Katsouleas, Thomas; Muggli, Patric; Oz, Erdem] Univ Southern Calif, Los Angeles, CA 90007 USA. RP Ischebeck, R (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM rasmus@slac.stanford.edu RI Lu, Wei/F-2504-2016 FU Department of Energy [DE-AC02-76SF00515, DE-FG02-92-ER40745, DE-FG03-92ER40745, DE-FC02-01ER41179, DE-FG03-92ER40727, DE-FG02-03ER54721, DE-F52-03NA00065, DE-AC-0376SF0098]; National Science Foundation [ECS-9632735, NSF-Phy-0321345] FX Work supported by: Department of Energy contracts DE-AC02-76SF00515 (SLAC), DE-FG02-92-ER40745, DE-FG03-92ER40745, DE-FC02-01ER41179, DE-FG03-92ER40727, DE-FG02-03ER54721, DE-F52-03NA00065:A004, DE-AC-0376SF0098, and National Science Foundation grants No. ECS-9632735, NSF-Phy-0321345. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 499 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300167 ER PT B AU Kirby, N Berry, M Blumenfeld, I Decker, FJ Hogan, MJ Ischebeck, R Iverson, R Siemann, R Walz, D Clayton, CE Huang, C Joshi, C Lu, W Marsh, KA Mori, WB Zhou, M Katsouleas, TC Muggli, P Oz, E AF Kirby, N. Berry, M. Blumenfeld, I. Decker, F. -J. Hogan, M. J. Ischebeck, R. Iverson, R. Siemann, R. Walz, D. Clayton, C. E. Huang, C. Joshi, C. Lu, W. Marsh, K. A. Mori, W. B. Zhou, M. Katsouleas, T. C. Muggli, P. Oz, E. GP IEEE TI Emittance measurements of trapped electrons from a plasma wakefield accelerator SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Recent electron beam driven plasma wakefield accelerator experiments carried out at SLAC showed trapping of plasma electrons. These trapped electrons appeared on an energy spectrometer with smaller transverse size than the beam driving the wake. A connection is made between transverse size and emittance; due to the spectrometer's resolution, this connection allows for placing an upper limit on the trapped electron emittance. The upper limit for the lowest normalized emittance measured in the experiment is 1 mm.mrad. C1 [Kirby, N.; Berry, M.; Blumenfeld, I.; Decker, F. -J.; Hogan, M. J.; Ischebeck, R.; Iverson, R.; Siemann, R.; Walz, D.] SLAC, Menlo Pk, CA USA. [Clayton, C. E.; Huang, C.; Joshi, C.; Lu, W.; Marsh, K. A.; Mori, W. B.; Zhou, M.] Univ Calif Los Angeles, Los Angeles, CA USA. [Katsouleas, T. C.; Muggli, P.; Oz, E.] USC, Los Angeles, CA USA. RP Kirby, N (reprint author), SLAC, Menlo Pk, CA USA. RI Lu, Wei/F-2504-2016 NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 505 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300169 ER PT B AU Loos, H Borden, T Emma, P Frisch, J Wu, J AF Loos, H. Borden, T. Emma, P. Frisch, J. Wu, J. GP IEEE TI Relative bunch length monitor for the linac coherent light source (LCLS) using coherent edge radiation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ultra-short bunches of the electron beam for LCLS are generated in two 4-dipole bunch compressors located at energies of 250 MeV and 4.3 GeV. Although an absolute measurement of the bunch length can be done by using a transverse deflecting cavity in an interceptive model a non-interceptive single shot method is needed as a relative measurement of the bunch length used in the continuous feedback for beam energy and peak current. We report on the design and implementation of two monitors measuring the integrated power of coherent edge radiation from the last dipole in each chicane. C1 [Loos, H.; Borden, T.; Emma, P.; Frisch, J.; Wu, J.] SLAC, Menlo Pk, CA 94025 USA. RP Loos, H (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM loos@slac.stanford.edu NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 508 EP 510 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300170 ER PT B AU McGuinness, C Colby, E Ischebeck, R Noble, R Sears, CMS Siemann, RH Spencer, J Walz, D Plettner, T Byer, RL AF McGuinness, C. Colby, E. Ischebeck, R. Noble, R. Sears, C. M. S. Siemann, R. H. Spencer, J. Walz, D. Plettner, T. Byer, R. L. GP IEEE TI Timing stability and control at the E163 laser acceleration experiment SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The laser acceleration experiments conducted for the E163 project at the NLC Test Accelerator facility at SLAC have stringent requirements on the temporal properties of the electron and laser beams. A system has been implemented to measure the relative phase stability between the RF sent to the gun, the RF sent to the accelerator, and the laser used to generate the electrons. This system shows rms timing stability better than 1 psec. Temporal synchronicity between the 0.5 psec electron bunch, and the 0.5 psec laser pulse is also of great importance. Cherenkov radiation is used to measure the arrival time of the electron bunch with respect to the laser pulse, and the path length of the laser transport is adjusted to optimize temporal overlap. A linear stage mounted onto a voice coil is used to make shot-by-shot fine timing adjustments to the laser path. The final verification of the desired time stability and control is demonstrated by observing the peak of the laser-electron interaction signal over the course of several minutes. C1 [McGuinness, C.; Colby, E.; Ischebeck, R.; Noble, R.; Sears, C. M. S.; Siemann, R. H.; Spencer, J.; Walz, D.] SLAC, Menlo Pk, CA USA. [Plettner, T.; Byer, R. L.] Stanford Univ, Stanford, CA 94305 USA. RP McGuinness, C (reprint author), SLAC, Menlo Pk, CA USA. EM cmcg@slac.stanford.edu FU Department of Energy [DE-AC02-76SF00515, DE-FG06-97ER41276] FX This work is supported by Department of Energy contracts DE-AC02-76SF00515 and DE-FG06-97ER41276. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 511 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300171 ER PT B AU Molloy, S Emma, P Frisch, J Iverson, R Ross, M McCormick, D Woods, M Walston, S Blackmore, V AF Molloy, S. Emma, P. Frisch, J. Iverson, R. Ross, M. McCormick, D. Woods, M. Walston, S. Blackmore, V. GP IEEE TI Picosecond bunch length and energy-z correlation measurements at SLAC's A-line and End Station A SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We report on measurements of picosecond bunch lengths and the energy-z correlation of the bunch with a high energy electron test beam to the A-line and End Station A (ESA) facilities at SLAC. The bunch length and the energy-z correlation of the bunch are measured at the end of the linac using a synchrotron light monitor diagnostic at a high dispersion point in the A-fine and a transverse RF deflecting cavity at the end of the linac. Measurements of the bunch length in ESA were made using high frequency diodes (up to 100 GHz) and pyroelectric detectors at a ceramic gap in the beamline. Modelling of the beam's longitudinal phase space through the linac and A-line to ESA is done using the 2-dimensional tracking program LiTrack, and LiTrack simulation results are compared with data. High frequency diode and pyroelectric detectors are planned to be used as part of a bunch length feedback system for the LCLS FEL at SLAC. The LCLS also plans precise bunch length and energy-z correlation measurements using transverse RF deflecting cavities. C1 [Molloy, S.; Emma, P.; Frisch, J.; Iverson, R.; Ross, M.; McCormick, D.; Woods, M.] SLAC, Menlo Pk, CA USA. [Walston, S.] Lawrence Livermore Natl Lab, Livermore, CA USA. [Blackmore, V.] Univ Oxford, Oxford, England. RP Molloy, S (reprint author), SLAC, Menlo Pk, CA USA. EM smolloy@slac.stanford.edu FU US Department of Energy [DE-AC02-76SF00515]; U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory [W-7405-Eng-48] FX Work supported by US Department of Energy Contract DE-AC02-76SF00515. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract W-7405-Eng-48. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 514 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300172 ER PT B AU Molloy, S Seletskiy, S Woods, M Smith, JDA Beard, CD Fernandez-Hernando, JL Watson, N Bungau, A Sopczak, A AF Molloy, S. Seletskiy, Sergei Woods, Mike Smith, Jonathan David Andrew Beard, Carl David Fernandez-Hernando, Juan Luis Watson, Nigel Bungau, Adriana Sopczak, Andre GP IEEE TI Measurements of the transverse wakefields due to varying collimator characteristics SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We report on measurements of the transverse wakefields induced by collimators of differing characteristics. An apparatus allowing the insertion of different collimator jaws into the path of a beam was installed in End Station A (ESA) in SLAC. Eight comparable collimator geometries were designed, including one that would allow easy comparison with previous results, and were installed in this apparatus. Measurements of the beam kick due to the collimator wakefields were made with a beam energy of 28.5 GeV, and beam dimensions of 100 microns vertically and a range of 0.5 to 1.5 mm longitudinally. The trajectory of the beam upstream and downstream of the collimator test apparatus was determined from the outputs of ten BPMs (four upstream and six downstream), thus allowing a measurement of the angular kick imparted to the beam by the collimator under test. The transverse wakefield was inferred from the measured kick. The different aperture designs, data collection and analysis, and initial comparison to theoretical and analytic predictions are presented here. C1 [Molloy, S.; Seletskiy, Sergei; Woods, Mike] SLAC, Menlo Pk, CA USA. [Smith, Jonathan David Andrew] Cockcroft Inst, Warrington, Cheshire, England. [Beard, Carl David; Fernandez-Hernando, Juan Luis] STFC, DL, ASTeC, Warrington, Cheshire, England. [Watson, Nigel] STFC, RAL, ASTeC, Didcot, Oxon, England. [Bungau, Adriana] UMAN, Manchester, Lancs, England. [Sopczak, Andre] Univ Lancaster, Lancaster, England. RP Molloy, S (reprint author), SLAC, Menlo Pk, CA USA. EM smolloy@slac.stanford.edu FU EC; EUROTeV DS [011899 RIDS]; U.S. Department of Energy [DEAC02- 76SF00515] FX Work supported in part by the EC under the FP6 Research Infrasctructure Action - Structuring the European Research Area EUROTeV DS Project Contract no.011899 RIDS and by U.S. Department of Energy contract DEAC02- 76SF00515. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 517 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300173 ER PT B AU Novokhatski, A Seeman, J Sullivan, M AF Novokhatski, A. Seeman, J. Sullivan, M. GP IEEE TI Modeling of the sparks in Q2-bellows of the PEP-II SLAC B-factory SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The PEP-II B-factory at SLAC has recently experienced unexpected aborts due to anomalously high radiation levels at the BaBar detector. Before the problem was finally traced, we performed a wake field analysis of the Q-2 bellows, which is located at a distance of 2.2 m from the interaction point. Analysis showed that the electric field in a small gap between a ceramic tile and metal flange can be high enough to produce sparks or even breakdowns. Later traces of sparks were found in this bellows. C1 [Novokhatski, A.; Seeman, J.; Sullivan, M.] SLAC, Menlo Pk, CA 94025 USA. RP Novokhatski, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM novo@slac.stanford.edu NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 520 EP 522 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300174 ER PT B AU Novokhatski, A DeBarger, S Ecklund, S Kurita, N Seeman, J Sullivan, M Weathersby, S Wienands, U AF Novokhatski, A. DeBarger, S. Ecklund, S. Kurita, N. Seeman, J. Sullivan, M. Weathersby, S. Wienands, U. GP IEEE TI New Q2-bellows absorber for the PEP-II SLAC B-factory SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A new Q2-bellows absorber will damp only transverse wake fields and will not produce additional beam losses due to Cherenkov radiation. The design is based on the results of HOM analysis. Geometry of the slots and absorbing tiles was optimized to get maximum absorbing effect. C1 [Novokhatski, A.; DeBarger, S.; Ecklund, S.; Kurita, N.; Seeman, J.; Sullivan, M.; Weathersby, S.; Wienands, U.] SLAC, Menlo Pk, CA 94025 USA. RP Novokhatski, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM novo@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 523 EP 525 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300175 ER PT B AU Novokhatski, A Heifets, S Teytelman, D AF Novokhatski, A. Heifets, S. Teytelman, D. GP IEEE TI High current effects in the PEP-II SLAC B-factory SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Wake fields defining beam stability affect also the beam optics and beam properties in high current machines. We present observations and analysis of the optical effects in the PEP-II SLAC B-factory, which has the record in achievement of high electron and positron currents [1]. We study the synchronous phase and the bunch length variation along the train of bunches, and overall bunch lengthening. C1 [Novokhatski, A.; Heifets, S.; Teytelman, D.] SLAC, Menlo Pk, CA 94025 USA. RP Novokhatski, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM novo@slac.stanford.edu NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 526 EP 528 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300176 ER PT B AU Novokhatski, A AF Novokhatski, A. GP IEEE TI Numerical study of RF-focusing using Fokker-Plank equation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Based on the numerical solution of the Fokker-Plank equation we study the effect of longitudinal damping on the modulation of the bunch length in a storage ring with high RF voltage and momentum compaction. C1 SLAC, Menlo Pk, CA 94025 USA. RP Novokhatski, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM novo@slac.stanford.edu NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 529 EP 531 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300177 ER PT B AU Wang, L Bane, K Chen, C Himel, T Munro, M Pivi, M Raubenheimer, T Stupakov, Q AF Wang, L. Bane, K. Chen, C. Himel, T. Munro, M. Pivi, M. Raubenheimer, T. Stupakov, Q. GP IEEE TI Suppression of secondary electron emission using triangular grooved surface in the ILC dipole and wiggler magnets SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The development of an electron cloud in the vacuum chambers of high intensity positron and proton storage rings may limit machine performance. The suppression of electrons in a magnet is a challenge for the positron damping ring of the International Linear Collider (ILC) as well as the Large Hadron Collider. Simulation show that grooved surfaces can significantly reduce the electron yield in a magnet. Some of the secondary electrons emitted from the grooved surface return to the surface within a few gyrations, resulting in a low effective secondary electron yield (SEY) of below 1.0 A triangular surface is an effective, technologically attractive mitigation with a low SEY and a weak dependence on the scale of the corrugations and the external magnetic field. A chamber with triangular grooved surface is proposed for the dipole and wiggler sections of the ILC and will be tested in KEKB in 2007. The strategy of electron cloud control in ILC and the optimization of the grooved chamber such as the SEY, impedance as well as the manufacturing of the chamber, are also discussed. C1 [Wang, L.; Bane, K.; Chen, C.; Himel, T.; Munro, M.; Pivi, M.; Raubenheimer, T.; Stupakov, Q.] SLAC, Menlo Pk, CA 94025 USA. RP Wang, L (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 11 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 532 EP 534 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300178 ER PT B AU Wang, L Cai, Y Raubenheimer, T AF Wang, L. Cai, Y. Raubenheimer, T. GP IEEE TI Simulation of the beam-ion instability in the electron damping ring of the International Linear Collider SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Ion induced beam instability is one critical issue for the electron damping ring of the International Linear Collider (ILC) due to its ultra small emittance of 2pm. Bunch train filling pattern is proposed to mitigate the instability and bunch-by-bunch feedback is applied to suppress it. Multi-bunch train fill pattern is introduced in the electron beam to reduce the number of trapped ions. Our study shows that the ion effects can be significantly mitigated by using multiple gaps. However, the beam can still suffer from the beam-ion instability driven by the accumulated ions that cannot escape from the beam during the gaps. The effects of beam fill pattern, emittance, vacuum and various damping mechanism are studied using self-consistent program, which includes the optics of the ring. C1 [Wang, L.; Cai, Y.; Raubenheimer, T.] SLAC, Menlo Pk, CA 94025 USA. RP Wang, L (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 535 EP 537 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300179 ER PT B AU Wang, L Chao, A Wei, J AF Wang, L. Chao, A. Wei, J. GP IEEE TI Geometric effects on electron cloud SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The development of an electron cloud in the vacuum chambers of high intensity positron and proton storage rings may limit the machine performances by inducing beam instabilities, beam emittance increase, beam loss, vacuum pressure increases and increased heat load on the vacuum chamber wall. The electron multipacting is a kind of geometric resonance phenomenon and thus is sensitive to the geometric parameters such as the aperture of the beam pipe, beam shape and beam bunch fill pattern, etc. This paper discusses the geometric effects on the electron cloud build-up in a beam chamber and examples are given for different beams and accelerators. C1 [Wang, L.; Chao, A.] SLAC, Menlo Pk, CA 94025 USA. [Wei, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Wang, L (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM wanglf@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 538 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300180 ER PT B AU Wang, L Li, Z Seryi, A AF Wang, L. Li, Z. Seryi, A. GP IEEE TI Precise calculation of traveling-wave periodic structure SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The effects of the round edge beam hole on the frequency and wake field are studied using variational method, which allows for rounded iris disk hole without any approximation in shape treatment. The frequency and wake field of accelerating mode and dipole mode are studied for different edge radius cases, including the flat edge shape that is often used to approximately represent the actual structure geometry. The edge hole shape has weak effect on the frequency, but much effect on the wake field. Our study shows that the amounts of wake fields are not precise enough with the assumption of the flat edge beam hole instead of round edge. C1 [Wang, L.; Li, Z.; Seryi, A.] SLAC, Menlo Pk, CA 94025 USA. RP Wang, L (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM wanglf@slac.stanford.edu NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 541 EP 543 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300181 ER PT B AU Warnock, RL AF Warnock, Robert L. GP IEEE TI Coherent synchrotron radiation and space charge for a 1-D source on an arbitrary planar orbit SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Realistic modeling of coherent synchrotron radiation (CSR) and the space charge force in single-pass systems and rings usually requires at least a two-dimensional (2-D) description of the charge/current density of the bunch. Since that leads to costly computations, one often resorts to a 1-D model of the bunch for first explorations. This paper provides several improvements to previous 1-D theories, eliminating unnecessary approximations and physical restrictions. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Warnock, RL (reprint author), Stanford Linear Accelerator Ctr, MS-26, Menlo Pk, CA 94025 USA. EM warnock@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 544 EP 546 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300182 ER PT B AU Wittmer, W Fisher, AS Martin, DJ Sebek, JJ AF Wittmer, W. Fisher, A. S. Martin, D. J. Sebek, J. J. GP IEEE TI Detection of instrumental drifts in the PEP II LER BPM system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB During the last PEP-II run a major goal was to bring the Low-Energy Ring optics as close as possible to the design. A large number of BPMs exhibited sudden artificial jumps that interfered with this effort. The source of the majority of these jumps had been traced to the filter-isolator boxes (FIBS) near the BPM buttons. A systematic approach to find and repair the failing units had been developed and implemented. Despite this effort, the instrumental orbit jumps never completely disappeared. To trace the source of this behavior a test setup, using a spare Bergoz MX-BPM processor (kindly provided by SPEAR III at SSRL), was connected in parallel to various PEP-H BPM processors. In the course of these measurements a slow instrumental orbit drift was found which was clearly not induced by a moving positron beam. Based on the size of the system and the limited time before PEP-III closes in Oct.2008, an accelerator improvement project was initiated to install BERGOZ BPM-MX processors close to all sextupoles. C1 [Wittmer, W.; Fisher, A. S.; Martin, D. J.; Sebek, J. J.] SLAC, Menlo Pk, CA 94025 USA. RP Wittmer, W (reprint author), SLAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM wittmer@slac.stanford.edu NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 547 EP 549 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300183 ER PT B AU Wu, JH Chao, AW Delayen, JR AF Wu, Juhao Chao, Alexander W. Delayen, Jean R. GP IEEE TI Transverse effect due to short-range resistive wall wakefield SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID FIELDS AB For accelerator designs with ultra short electron beams, beam dynamics study has to invoke the short-range wakefields. In this paper, we first obtain the short-range dipole mode resistive wall wakefield. Analytical approach is then developed to study the single bunch transverse beam dynamics due to this short-range resistive wall wake. The results are applied to the LCLS undulator. C1 [Wu, Juhao; Chao, Alexander W.] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. [Delayen, Jean R.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. [Delayen, Jean R.] Old Dominion Univ, Norfolk, VA 23529 USA. RP Wu, JH (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. EM jhwu@SLAC.Stanford.EDU FU US Department of Energy [DE-AC02-76SF00515, DE-AC05-06OR23177] FX The work of AWC and JW was supported by the US Department of Energy under contract DE-AC02-76SF00515. The work of JRD was supported by US Department of Energy under contract No. DE-AC05-06OR23177. NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 550 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300184 ER PT B AU Delayen, JR Wu, J AF Delayen, J. R. Wu, J. GP IEEE TI Transverse effects due to random displacement of resistive wall segments and focusing elements SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper, we study the single bunch transverse beam dynamics in the presence of random displacements of resistive wall segments and focusing elements. Analytical formulas are obtained for long-range resistive wall wake, together with numerical results for short-range resistive wall wake. The results are applied to the LCLS project and some other proposed accelerators. C1 [Delayen, J. R.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. [Delayen, J. R.] Old Dominion Univ, Norfolk, VA 23529 USA. [Wu, J.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Delayen, JR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. EM delayen@jlab.org; jhwu@slac.stanford.edu FU LLC under U.S. DOE [DE-AC05-06OR23177]; U.S. DOE [DE-AC03-76SF00515] FX Authored in part by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177 (JRD) and supported in part by U.S. DOE Contract No. DE-AC03-76SF00515 (JW). The U.S. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 553 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300185 ER PT B AU Davidson, RC Startsev, EA Qin, H AF Davidson, Ronald C. Startsev, Edward A. Qin, Hong GP IEEE TI Kinetic description of nonlinear wave and soliton excitations in coasting charged particle beams SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SYNCHROTRONS AB A one-dimensional kinetic model based on the Vlasov-Maxwell equations is used to describe nonlinear wave and soliton excitations in coasting charged particle beams. Analytical solutions are obtained for nonlinear traveling wave pulses, and particle-in-cell simulations are presented that describe stability properties and long-time evolution. C1 [Davidson, Ronald C.; Startsev, Edward A.; Qin, Hong] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Davidson, RC (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 559 EP 561 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300187 ER PT B AU Startsev, EA Davidson, RC Qin, H AF Startsev, Edward A. Davidson, Ronald C. Qin, H. GP IEEE TI Numerical studies of the electromagnetic Weibel instability in intense charged particle beams with large temperature anisotropy using the nonlinear best Darwin delta f code SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A numerical scheme for the electromagnetic particle simulation of high-intensity charged particle beams has been developed which is a modification of the Darwin model. The Darwin model neglects the transverse induction current in Amperes law and therefore eliminates fast electromagnetic (light) waves from the simulations. The model has been incorporated into the nonlinear delta f Beam Equilibrium Stability and Transport(BEST) code. We have applied the model to simulate the transverse electromagnetic Weibel instability in a single-species charged particle beam and the mechanism for nonlinear saturation is identified. C1 [Startsev, Edward A.; Davidson, Ronald C.; Qin, H.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Startsev, EA (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 562 EP 564 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300188 ER PT B AU Kanareykin, A Jing, C Schoessow, P Kustov, A Power, JG Gai, W AF Kanareykin, A. Jing, C. Schoessow, P. Kustov, A. Power, J. G. Gai, W. GP IEEE TI Beam breakup instabilities in dielectric structures SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We report on the experimental and numerical investigation of beam breakup (BBU) effects in dielectric structures resulting from parasitic wakefields. The experimental program focuses on measurements of BBU in a number of wakefield devices: (a) a 26 GHz power extraction structure; (b) a high gradient dielectric wakefield accelerator; (c) a wakefield structure driven by a high current ramped bunch train for multibunch BBU studies. New beam diagnostics will provide methods for studying parasitic wakefields that are currently unavailable at the AWA facility. The numerical part of this research is based on a particle-Green's function beam breakup code we are developing using the approach described in [1] that allows rapid, efficient simulation of beam breakup effects in advanced linear accelerators. The goal of this work is to be able to compare the accurate numerical results with the results of detailed experimental measurements and to design the external focusing system for the control of the beam in the presence of strong transverse wakefields. C1 [Kanareykin, A.; Jing, C.; Schoessow, P.] Euclid Techlabs LLC, Rockville, MD USA. [Kustov, A.] Dynam Software, Espoo, Finland. [Power, J. G.; Gai, W.] Argonne Natl Lab, Argonne, IL USA. RP Kanareykin, A (reprint author), Euclid Techlabs LLC, Rockville, MD USA. EM alexkan@euclidtechlabs.com FU DOE SBIR FX Work supported by DOE SBIR Phase I Funding. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 565 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300189 ER PT B AU Beebe-Wang, J AF Beebe-Wang, J. GP IEEE TI Emittance growth due to beam-beam effect in RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The beam-beam interaction has a significant impact on the beam emittance growth and the luminosity lifetime in RHIC. A simulation study of the emittance growth was performed using the LIFETRAC code. The operational conditions of RHIC 2006 100GeV polarized proton run were used in the study. In this paper, the result of this study is presented and compared to the experimental measurements. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Beebe-Wang, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM bbwang@bnl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 568 EP 570 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300190 ER PT B AU Beebe-Wang, J Jain, A AF Beebe-Wang, J. Jain, A. GP IEEE TI Realistic non-linear model and field quality analysis in RHIC interaction regions SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The existence of multipole components in the dipole and quadrupole magnets is one of the factors limiting the beam stability in the RHIC operations. So, a realistic nonlinear model is crucial for understanding the beam behavior and to achieve the ultimate performance in RHIC. A procedure is developed to build a non-linear model using the available multipole component data obtained from measurements of RHIC magnets. We first discuss the measurements performed at different stages of manufacturing of the magnets in relation to their current state in RHIC. We then describe the procedure to implement these measurement data into tracking models, including the implementation of the multipole feed down effect due to the beam orbit offset from the magnet center. Finally, the field quality analysis in the RHIC interaction regions (IR) is presented. C1 [Beebe-Wang, J.; Jain, A.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Beebe-Wang, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 571 EP 573 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300191 ER PT B AU Bengtsson, J AF Bengtsson, J. GP IEEE TI The Poincare map, lie generator, nonlinear invariant, parameter dependance, and dynamic aperture for rings SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In earlier work related to the NSLS-II project we have outlined a control theory approach for the dynamic aperture problem. In particular, an algorithm for the joint optimization of the Lie generator and the working point for the Poincar map. This time we report on how the Lie generator provides guidelines on acceptable magnitudes for e.g. the intrinsic nonlinear effects from insertion devices, and the nonlinear pseudo-invariant from the map normal form can be used to optimize the dynamic aperture. We also show how a polymorphic beam line class can be used to study the parameter dependence and rank conditions for control of optics and dynamic aperture. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Bengtsson, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM bengtsson@bnl.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 574 EP 576 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300192 ER PT B AU Blednykh, A Krinsky, S AF Blednykh, Alexei Krinsky, Samuel GP IEEE TI Prelmnary impedance budget for NSLS-II storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The wakefield and impedance produced by the components of the NSLS-II storage ring have been computed for an electron bunch length of 3mm rms. The results are summarized in a table giving for each component, the loss factor (kappa(parallel to)), the imaginary part of the longitudinal impedance at low frequency divided by the revolution harmonic (ImZ(parallel to)/n), and the transverse kick factors (kappa(x), kappa(y)). C1 [Blednykh, Alexei; Krinsky, Samuel] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Blednykh, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM blednykh@bnl.gov NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 577 EP 579 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300193 ER PT B AU Blednykh, A Krinsky, S Rose, J AF Blednykh, Alexei Krinsky, Samuel Rose, Jim GP IEEE TI Coupling impedance of CESR-B RF cavity for the NSLS-II storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB CESR-B type superconducting cavities are under consideration for acceleration of the electron beam in the 3GeV NSLS-II storage ring. In this paper we present detailed investigation of longitudinal and transverse impedance of CESR-B cavity and transitions. Ferrite material is included in impedance analysis. Its effect on short range wakepotential has been studied using GdfidL code. The summary results of loss factors and kick factors are presented for a 3mm rms bunch length. C1 [Blednykh, Alexei; Krinsky, Samuel; Rose, Jim] NSLS, BNL, Upton, NY 11973 USA. RP Blednykh, A (reprint author), NSLS, BNL, Upton, NY 11973 USA. EM blednykh@bnl.gov NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 580 EP 582 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300194 ER PT B AU Blednykh, A Krinsky, S AF Blednykh, Alexei Krinsky, Samuel GP IEEE TI Impedance of electron beam vacuum chambers for the NSLS-II storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we discuss computation of the coupling impedance of the vacuum chambers for the NSLS-II storage ring using the electromagnetic simulator GdfidL [1]. The impedance of the vacuum chambers depends on the geometric dimensions of the cross-section and height of the slot in the chamber wall. Of particular concern is the complex geometry of the infrared extraction chambers to be installed in special large-gap dipole magnets. In this case, wakefields are generated due to tapered transitions and large vertical-aperture ports with mirrors near the electron beam. C1 [Blednykh, Alexei; Krinsky, Samuel] NSLS 2, BNL, Upton, NY 11973 USA. RP Blednykh, A (reprint author), NSLS 2, BNL, Upton, NY 11973 USA. EM blednykh@bnl.gov NR 10 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 583 EP 585 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300195 ER PT B AU Luo, Y Bai, M Calaga, R Bengtsson, J Fischer, W Malitsky, N Pilat, R Satogata, T AF Luo, Y. Bai, M. Calaga, R. Bengtsson, J. Fischer, W. Malitsky, N. Pilat, R. Satogata, T. GP IEEE TI Measurement and correction of third resonance driving term in the RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To further improve the luminosity in polarized proton operation of the Relativistic Heavy Ion Collider, correction of the horizontal two-third resonance at store is desirable. The long-lasting coherent beam oscillations, produced by the AC dipole, are used to measure 3Q(x)'s resonance driving term h(30000) through the analysis of turn-by-turn beam position data with the algorithm outlined by J. Bengtsson. The resonance driving term h(30000) can be compensated with the 12 arc chromatic sextupole families. hi this article, we will review the technique of h(30000) resonance driving term's measurement and correction with AC dipole excitation in the RHIC, followed by the preliminary beam experiment results from the RHIC 2006 polarized proton run. C1 [Luo, Y.; Bai, M.; Calaga, R.; Bengtsson, J.; Fischer, W.; Malitsky, N.; Pilat, R.; Satogata, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Luo, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 586 EP 588 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300196 ER PT B AU Luo, Y Fischer, W Tepikian, S Trobjevic, D AF Luo, Y. Fischer, W. Tepikian, S. Trobjevic, D. GP IEEE TI Online nonlinear chromaticity correction using off-momentum tune response matrix SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this article, we propose a method for the online nonlinear chromaticity correction at store in the Relativistic Heavy Ion Collider (RHIC). With 8 arc sextupole families in each RHIC ring, the nonlinear chromaticities can be minimized online by matching the off-momentum tunes onto the wanted tunes given by the linear chromaticities. The Newton method is used for this multi-dimensional nonlinear optimization, where the off-momentum tune response matrix with respect to sextupole strength changes is adopted. The off-momentum tune response matrix can be calculated with the online accelerator optics model or directly measured with the real beam. This is a report on the correction algorithm for the RHIC. Simulations are also carried out to verify the method. The preliminary results from the beam experiments, taken place in the RHIC 2007 Au run, are reviewed. C1 [Luo, Y.; Fischer, W.; Tepikian, S.; Trobjevic, D.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Luo, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 589 EP 591 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300197 ER PT B AU Luo, Y Bai, M Beebe-Wang, J Fischer, W Jain, A Montag, C Roser, T Tepikian, S Trobjevic, D AF Luo, Y. Bai, M. Beebe-Wang, J. Fischer, W. Jain, A. Montag, C. Roser, T. Tepikian, S. Trobjevic, D. GP IEEE TI Dynamic aperture evaluation at the current working point for RHIC polarized proton operation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB With the updated multipole magnet field errors in the interaction regions (IRs), detailed dynamic aperture studies are carried out around the current RHIC polarized proton (pp) working point. The beam parameters and beta*s are similar to those proposed for the next pp run. The effects on the dynamic apertures from nonlinear corrections, such as multipole field error correction in the IRs, second order chromaticity correction and horizontal third order resonance correction are evaluated. The sextupole components in the arc dipoles and the observed tune ripples are also considered. C1 [Luo, Y.; Bai, M.; Beebe-Wang, J.; Fischer, W.; Jain, A.; Montag, C.; Roser, T.; Tepikian, S.; Trobjevic, D.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Luo, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 592 EP 594 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300198 ER PT B AU Makdisi, Y Bravar, A Bunce, G Gill, R Huang, H Li, Z Khodinov, A Kponou, A Meng, W Nass, A Rescia, S Zelenski, A Zubets, V Chapman, MA Haeberli, W Wise, T Alekseev, I Svirida, D Jinnouchi, O Nakagawa, I Okada, H Saito, N Dhawan, S Stephenson, E Eyser, KO AF Makdisi, Y. Bravar, A. Bunce, G. Gill, R. Huang, H. Li, Z. Khodinov, A. Kponou, A. Meng, W. Nass, A. Rescia, S. Zelenski, A. Zubets, V. Chapman, M. A. Haeberli, W. Wise, T. Alekseev, I. Svirida, D. Jinnouchi, O. Nakagawa, I. Okada, H. Saito, N. Dhawan, S. Stephenson, E. Eyser, K. O. GP IEEE TI Absolute measurement of the polarization of high energy proton beams at RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The spin physics program at the Relativistic Heavy Ion Collider (RHIC) requires knowledge of the beam polarization to better than 5%. Such a goal is made the more difficult by the lack of knowledge of the analyzing power of high energy nuclear physics processes. To overcome this, a polarized hydrogen jet target was constructed and installed at one intersection region in RHIC where it intersects both beams and utilizes the precise knowledge of the jet atomic hydrogen beam polarization to measure the analyzing power in proton-proton elastic scattering in the Nuclear Coulomb Interference (CNI) region at the prescribed RHIC proton beam energy. The reverse reaction is used to assess the absolute beam polarization. Simultaneous measurements taken with fast high statistics polarimeters that measure the p-Carbon elastic scattering process also in the CNI region use the jet results to calibrate the latter. In this presentation, the status of the polarized jet target mechanics, operation, detector systems, and data analysis results are described. The statistical accuracies as well as the systematic uncertainties will be discussed. C1 [Makdisi, Y.; Bravar, A.; Bunce, G.; Gill, R.; Huang, H.; Li, Z.; Khodinov, A.; Kponou, A.; Meng, W.; Nass, A.; Rescia, S.; Zelenski, A.; Zubets, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Chapman, M. A.; Haeberli, W.; Wise, T.] Univ Wisconsin, Madison, WI 53706 USA. [Alekseev, I.; Svirida, D.] Inst Theoret & Expt Phys, Moscow 117259, Russia. [Jinnouchi, O.; Nakagawa, I.] RIKEN, BNL Res ctr, Upton, NY 11973 USA. [Okada, H.; Saito, N.] Kyoto Univ, Kyoto 6068501, Japan. [Stephenson, E.] Indiana Univ, Bloomington, IN 47408 USA. [Eyser, K. O.] Univ Calif Riverside, Riverside, CA 92521 USA. RP Makdisi, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM makdisi@bnl.gov RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016 OI Alekseev, Igor/0000-0003-3358-9635; FU Brookhaven Scienc Associates, LLC with U.S. Department of Energy [DE-AC02-98CH10886] FX This work was supported by Brookhaven Scienc Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 595 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300199 ER PT B AU Montag, C Bengtsson, J Nash, B AF Montag, C. Bengtsson, J. Nash, B. GP IEEE TI Touschek lifetime calculations and simulations for NSLS-II SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The beam lifetime in most medium energy synchrotron radiation sources is limited by the Touschek effect, which describes the momentum transfer from the transverse into the longitudinal direction due to binary collisions between electrons. While an analytical formula exists to calculate the resulting lifetime, the actual momentum acceptance necessary to perform this calculation can only be determined by tracking. This is especially the case in the presence of small vertical apertures at insertion devices. In this case, nonlinear betatron coupling leads to beam losses at these vertical aperture restrictions. In addition, a realistic model of the storage ring is necessary for calculation of equilibrium beam sizes (particularly in the vertical direction) which are important for a self-consistent lifetime calculation. C1 [Montag, C.; Bengtsson, J.; Nash, B.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Montag, C (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 598 EP 600 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300200 ER PT B AU Pozdeyev, E Ben-Zvi, I Cameron, P Drees, A Gassner, D Kayran, D Litvinenko, V Mahler, G Rao, T AF Pozdeyev, E. Ben-Zvi, I. Cameron, P. Drees, A. Gassner, D. Kayran, D. Litvinenko, V. Mahler, G. Rao, T. GP IEEE TI Diagnostics of BNL ERL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ERL Prototype project is currently under development at the Brookhaven National Laboratory. The ERL is expected to demonstrate energy recovery of high-intensity beams with a current of up to a few hundred milliamps, while preserving the emittance of bunches with a charge of a few nanocoulombs produced by a high-current SRF gun. To successfully accomplish this task the machine will include beam diagnostics that will be used for accurate characterization of the three dimensional beam phase space at the injection and recirculation energies, transverse and longitudinal beam matching, orbit alignment, beam current measurement, and machine protection. This paper outlines requirements on the ERL diagnostics and describes its setup and modes of operation. C1 [Pozdeyev, E.; Ben-Zvi, I.; Cameron, P.; Drees, A.; Gassner, D.; Kayran, D.; Litvinenko, V.; Mahler, G.; Rao, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Pozdeyev, E (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Kayran, Dmitry/E-1876-2013 OI Kayran, Dmitry/0000-0002-1156-4384 NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 601 EP 603 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300201 ER PT B AU Poelker, M Adderley, P Brittian, J Clark, J Grames, J Hansknecht, J McCarter, J Stutzman, ML Suleiman, R Surles-Law, K AF Poelker, M. Adderley, P. Brittian, J. Clark, J. Grames, J. Hansknecht, J. McCarter, J. Stutzman, M. L. Suleiman, R. Surles-Law, K. GP IEEE TI Status of high polarization DC high voltage gallium arsenide photoelectron guns SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID VACUUM; LASER AB Users receive very high beam polarization from reliable GaAs photoelectron guns at facilities worldwide. Satisfaction with beam quality (and a number of lab closures) has reduced the level of polarized source R&D from the heyday of 1990s. However, new experiments and new accelerators proposals including high current unpolarized machines, require GaAs photoguns with capabilities that exceed today's state of the art. This submission describes the capabilities of today's high-polarization DC high voltage GaAs photoguns and discusses issues that must be addressed to meet new demands. C1 [Poelker, M.; Adderley, P.; Brittian, J.; Clark, J.; Grames, J.; Hansknecht, J.; McCarter, J.; Stutzman, M. L.; Suleiman, R.; Surles-Law, K.] Jefferson Lab, Newport News, VA 23606 USA. RP Poelker, M (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM poelker@jlab.org NR 19 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 604 EP 608 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300202 ER PT B AU Okamura, M Kondrashev, S AF Okamura, M. Kondrashev, S. GP IEEE TI Review of laser driven sources for multi-charged ions SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Since the first idea of an ion source using laser ablation plasma arose, almost forty years has already passed. It was found that the laser plasma could provide ultra intense beam with high charge state easily. In spite of this advantage, the laser ion source (LIS) has not been accepted by a major stream of the accelerator field. Once the laser plasma produced, it is hard to control the pulse structure. However, accumulated research results by many groups capable us to provide high quality multi-charged ions from LIS now. The LIS suits not only for a large accelerator complexes but also for small facilities. The history of the LIS and a project for LHC at CERN are briefly introduced. Then recent activities about direct plasma injection scheme (DPIS) are explained. Also other works related to LIS are summarized. C1 [Okamura, M.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Kondrashev, S.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Okamura, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM okamura@bhl.gov FU US Department of Energy FX Work partially supported by the US Department of Energy NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 609 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300203 ER PT B AU Champion, M AF Champion, Mark GP IEEE TI SNS RF system performance and operation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Spallation Neutron Source (SNS) Linac and accumulator ring utilize 100 Radio-Frequency (RF) systems for acceleration and bunching of the proton beam. Several different types of gridded tubes and klystrons are operated at 1, 2, 402.5 and 805 MHz, at power levels ranging from a few kilowatts to several megawatts, to drive several types of accelerating cavities, both normaland super-conducting. The RF systems are standardized, especially in the Linac, to ease operation and maintenance. Phase and amplitude control is achieved with a digital Low-Level RF (LLRF) control system. The RF systems operate reliably and support production of a high-quality low-loss proton beam. Various modifications and upgrades have been made or are in progress to enhance system reliability and performance. Planning is well underway for a power upgrade that will require an additional 36 RF systems. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Champion, M (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 619 EP 621 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300205 ER PT B AU Tompkins, JC Kashikhin, V Parker, B Palmer, MA Clarke, JA AF Tompkins, J. C. Kashikhin, Vl. Parker, B. Palmer, M. A. Clarke, J. A. GP IEEE TI Superconducting magnet needs for the ILC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ILC Reference Design Report was completed early in February 2007. The Magnet Systems Group was formed to translate magnetic field requirements into magnet designs and cost estimates for the Reference Design. As presently configured, the ELC will have more than 13,000 magnetic elements of which more than 2300 will be based on superconducting technology. This paper will describe the major superconducting magnet needs for the ELC as presently determined by the Area Systems Groups, responsible for beam line design, working with the Magnet Systems Group. The superconducting magnet components include Main Linac quadrupoles, Positron Source undulators, Damping Ring wigglers, a complex array of Final Focus superconducting elements in the Beam Delivery System, and large superconducting solenoids in the e(+) and e(-) Sources, and the Ring to Main Linac lines. C1 [Tompkins, J. C.; Kashikhin, Vl.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Parker, B.] BNL, Upton, NY USA. [Palmer, M. A.] CLASSE, Ithaca, NY USA. [Clarke, J. A.] ASTeC Daresbury Lab, Warrington, Cheshire, England. RP Tompkins, JC (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL USA. EM jct@final.gov FU U. S. Department of Energy; U. S. National Science Foundation; U.K. Science & Technology Facilities Council FX Work supported by the U. S. Department of Energy, U. S. National Science Foundation, and the U.K. Science & Technology Facilities Council. NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 622 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300206 ER PT B AU Westenskow, GA Grote, D Bieniosek, F Kwan, JW AF Westenskow, G. A. Grote, D. Bieniosek, F. Kwan, J. W. GP IEEE TI A multi-beamlet injector for Heavy Ion Fusion: Experiments and modeling SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We have performed experiments and modeling to evaluate a proposed merging beamlet approach for use in a compact high-brightness Heavy Ion Fusion injector. We used an rf plasma source to produce the initial beamlets. An extraction current density of 100 mA/cm(2) was achieved, and the thermal temperature of the ions was below 1 eV. An array of converging beamlets was used to produce a beam with the envelope radius, convergence, and ellipticity matched to an electrostatic quadrupole channel. Experimental results were in good quantitative agreement with computer simulations and have demonstrated the feasibility of this concept. The size of a driver-scale injector system using this approach will be several times smaller than one designed using traditional single large-aperture beams. The success of this experiment has possible significant economical and technical impacts on the architecture of HIF drivers. C1 [Westenskow, G. A.; Grote, D.] Lawrence Livermore Natl Lab, Livermore, CA USA. [Bieniosek, F.; Kwan, J. W.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Westenskow, GA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA. EM glen_westenskow@lbl.gov FU US DOE by UC-LBNL [DE-AC03-76SF00098]; UC-LLNL [W-7405-ENG-48] FX This work has been performed under the auspices of the US DOE by UC-LBNL under contract DE-AC03-76SF00098 and by UC-LLNL under contract W-7405-ENG-48, for the Heavy Ion Fusion Virtual National Laboratory. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 629 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300207 ER PT B AU Alessi, J Beebe, E Gould, O Kponou, A Lockey, R Pikin, A Raparia, D Ritter, J Snydstrup, L AF Alessi, J. Beebe, E. Gould, O. Kponou, A. Lockey, R. Pikin, A. Raparia, D. Ritter, J. Snydstrup, L. GP IEEE TI High performance EBIS for RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An Electron Beam Ion Source (EBIS), capable of producing high charge states and high beam currents of any heavy ion species in short pulses, is ideally suited for injection into a synchrotron. An EBIS-based, high current, heavy ion preinjector is now being built at Brookhaven to provide increased capabilities for the Relativistic Heavy Ion Collider (RHIC), and the NASA Space Radiation Laboratory (NSRL). Benefits of the new preinjector include the ability to produce ions of any species, fast switching between species to serve the simultaneous needs of. multiple programs, and lower operating and maintenance costs. A state-of-the-art EBIS, operating with an electron beam current of up to 10 A, and producing multi-milliamperes of high charge state heavy ions, has been developed at Brookhaven, and has been operating very successfully on a test bench for several years. The present performance of this high-current EBIS is presented, along with details of the design of the scaled-up EBIS for RHIC, and the status of its construction. Other aspects of the project, including design and construction of the heavy ion RFQ, Linac, and matching beamlines, are also mentioned. C1 [Alessi, J.; Beebe, E.; Gould, O.; Kponou, A.; Lockey, R.; Pikin, A.; Raparia, D.; Ritter, J.; Snydstrup, L.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Alessi, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM alessi@bnl.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 634 EP 637 PG 4 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300208 ER PT B AU Adolphsen, C AF Adolphsen, Chris GP IEEE TI ILC RF system R&D SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ILC Linac Group at SLAC is actively pursuing a broad range of R&D to improve the reliability and reduce the cost of the L-band (1.3 GHz) rf system. Current activities include the development of a Marx-style modulator and a 10 MW sheet-beam klystron, construction of an rf distribution system with adjustable power tapoffs and custom hybrids, tests of cavity coupler components to understand rf processing limitations, simulations of multipacting in the couplers and optimization of the cavity fill parameters for operation with a large spread of sustainable cavity gradients. Also, a prototype positron capture cavity is being developed for the ILC injectors. This paper surveys the results from the past year and notes related L-band R&D at other labs, in particular, that at DESY for the XFEL project. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Adolphsen, C (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 638 EP 642 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300209 ER PT B AU Prestemon, S Marks, S Schlueter, R AF Prestemon, Soren Marks, Steve Schlueter, Ross GP IEEE TI New developments in light source magnet design SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID UNDULATOR AB The rapid growth in the light source community throughout the world has served to motivate innovation in the magnet technologies that serve as the foundations for both the storage ring lattice magnet systems and the primary radiation sources, the insertion devices. Here a sampling of magnet system developments being pursued at diverse facilities are discussed, including combined-function magnets that minimize space requirements and improve accelerator performance, high performance bend magnets that provide enhanced radiation characteristics, and novel and untested concepts for future lattice magnets. Finally, we review developments in insertion devices that promise new performance characteristics to better serve the light source community. C1 [Prestemon, Soren; Marks, Steve; Schlueter, Ross] LBL, Berkeley, CA 94720 USA. RP Prestemon, S (reprint author), LBL, Berkeley, CA 94720 USA. NR 39 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 649 EP 653 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300211 ER PT B AU Ozaki, S Bengtsson, J Kramer, SL Krinsky, S Litvinenko, VN AF Ozaki, S. Bengtsson, J. Kramer, S. L. Krinsky, S. Litvinenko, V. N. GP IEEE TI Philosophy for NSLS-II design with sub-nanometer horizontal emittance SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB NSLS-II at Brookhaven National Laboratory is a new third-generation storage ring light source, whose construction is on the verge of being approved by DOE. When completed, NSLS-II with its ability to provide users with a wide range of spectrum, ranging from IR to ultra-high brightness hard x-ray beams will replace the existing two (20+ years old) NSLS light sources. While presenting an overview of the NSLS-II accelerator system, this paper focuses on the strategy and development of a novel <1 nm emittance light source. C1 [Ozaki, S.; Bengtsson, J.; Kramer, S. L.; Krinsky, S.; Litvinenko, V. N.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Ozaki, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM ozaki@bnl.gov NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 674 EP 676 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300216 ER PT B AU Benson, S Beard, K Biallas, G Boyce, J Bullard, D Coleman, J Douglas, D Dylla, F Evans, R Evtushenko, P Hernandez-Garcia, C Grippo, A Gould, C Gubeli, J Hardy, D Hovater, C Jordan, K Klopf, M Li, R Moore, W Neil, G Poelker, M Powers, T Preble, J Rimmer, R Sexton, D Shinn, M Tennant, C Walker, R Williams, G Zhang, S AF Benson, S. Beard, K. Biallas, G. Boyce, J. Bullard, D. Coleman, J. Douglas, D. Dylla, F. Evans, R. Evtushenko, P. Hernandez-Garcia, C. Grippo, A. Gould, C. Gubeli, J. Hardy, D. Hovater, C. Jordan, K. Klopf, M. Li, R. Moore, W. Neil, G. Poelker, M. Powers, T. Preble, J. Rimmer, R. Sexton, D. Shinn, M. Tennant, C. Walker, R. Williams, G. Zhang, S. GP IEEE TI High power operation of the JLab IR FEL driver accelerator SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Operation of the JLab IR Upgrade FEL at CW powers in excess of 10 kW requires sustained production of high electron beam powers by the driver ERL. This in turn demands attention to numerous issues and effects, including: cathode lifetime; control of beamline and RF system vacuum during high current operation; longitudinal space charge; longitudinal and transverse matching of irregular/large volume phase space distributions; halo management; management of remnant dispersive effects; resistive wall, wake-field, and RF heating of beam vacuum chambers; the beam break up instability; the impact of coherent synchrotron radiation (both on beam quality and the performance of laser optics); magnetic component stability and reproducibility; and RF stability and reproducibility. We discuss our experience with these issues and describe the modus vivendi that has evolved during prolonged high current, high power beam and laser operation. C1 [Benson, S.; Beard, K.; Biallas, G.; Boyce, J.; Bullard, D.; Coleman, J.; Douglas, D.; Dylla, F.; Evans, R.; Evtushenko, P.; Hernandez-Garcia, C.; Grippo, A.; Gould, C.; Gubeli, J.; Hardy, D.; Hovater, C.; Jordan, K.; Klopf, M.; Li, R.; Moore, W.; Neil, G.; Poelker, M.; Powers, T.; Preble, J.; Rimmer, R.; Sexton, D.; Shinn, M.; Tennant, C.; Walker, R.; Williams, G.; Zhang, S.] TJNAF, Newport News, VA 23606 USA. RP Benson, S (reprint author), TJNAF, Newport News, VA 23606 USA. EM felman@jlab.org NR 5 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 680 EP 682 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300218 ER PT B AU Novokhatski, A AF Novokhatski, A. GP IEEE TI Overall HOM measurement at high beam currents in the PEP-II SLAC B-factory SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We describe a simple method of measuring the total Higher Order Mode (HOM) losses and the synchrotron radiation losses in a storage ring based on a straightforward model of a beam - cavity interaction and a precise knowledge of the rf power distribution. This method works well at higher currents. The comparison of the measured HOM losses and the estimates is given for both Low Energy Ring (LER) and High Energy Ring (HER) rings of the PEP-H SLAC B-factory. C1 SLAC, Menlo Pk, CA 94025 USA. RP Novokhatski, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM novo@slac.stanford.edu NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 692 EP 694 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300222 ER PT B AU Chan, KCD Turchi, P Jason, A AF Chan, K. C. Dominic Turchi, Peter Jason, Andy GP IEEE TI Electron accelerator options for photo-detection of fissile materials SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB For national security, it is important to detect the presence of Special Nuclear Materials, especially Highly-Enriched Uranium (HEU). Generally used methods for such detection include interrogation by photons and neutrons. For example, photofission in HEU can be initiated with 14-MeV photons. The resulting delayed neutrons and photons from the fission fragments are clear signatures of the presence of HEU. One can generate high-energy photons using electron accelerators via various mechanisms. In this paper, we will describe two of them, namely Electron bremsstrahlung and Compton backscattered photons. We focus on these two mechanisms because they cover a wide range of accelerator requirements. Electron bremsstrahlung can be generated using a compact low-energy electron linac while the generation of Compton backscattered photons requires a high-energy electron accelerator of a few hundred MeV. We review these two options, describe their accelerator requirements, and compare their relative merits. C1 [Chan, K. C. Dominic; Turchi, Peter; Jason, Andy] Los Alamos Natl Lab, Los Alamos, NM USA. RP Chan, KCD (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 701 EP 703 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300225 ER PT B AU Bieniosek, FM Leitner, M Logan, BG More, RM Roy, PK Ni, P Barnard, JJ Covo, MK Molvik, A Grisham, LR Yoneda, H AF Bieniosek, F. M. Leitner, M. Logan, B. G. More, R. M. Roy, P. K. Ni, P. Barnard, J. J. Covo, M. Kireeff Molvik, A. Grisham, L. R. Yoneda, H. GP IEEE TI Experiments in warm dense matter using an ion beam driver SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID PHYSICS AB Warm dense matter (WDM) conditions are to be achieved by combined longitudinal and transverse neutralized drift compression of an intense ion beam pulse to provide a hot spot on a target with a beam spot size of about. I mm, and pulse length about 1-2 ns. The range of the beams in solid matter targets is about I micron, which can be lengthened by using reduced density porous targets. Initial experiments in ion-beam-driven WDM win be at low beam velocity, below the Bragg peak, increasing toward the Bragg peak in subsequent higher-energy accelerators. Initial experiments include a transient darkening experiment and a experiment in porous targets at GSI. Further experiments will explore target temperature and other properties such as electrical conductivity to investigate phase transitions and the critical point. C1 [Bieniosek, F. M.; Leitner, M.; Logan, B. G.; More, R. M.; Roy, P. K.; Ni, P.; Barnard, J. J.; Covo, M. Kireeff; Molvik, A.] LBNL, Berkeley, CA USA. [Grisham, L. R.] PPPL, Princeton, NJ 08540 USA. [Grisham, L. R.] HIFS VNL, Livermore, CA USA. [Yoneda, H.] Univ Electrocommun, Tokyo, Japan. RP Bieniosek, FM (reprint author), LBNL, Berkeley, CA USA. EM fmbieniosek@lbl.gov FU U.S. Dept. of Energy by LBNL; LLNL; PPPL [W-7405-Eng-48, DE-AC02-05CH11231, DEAC02-76CH3073] FX Work performed under the auspices of the U.S. Dept. of Energy by LBNL, LLNL, and PPPL under Contracts No. W-7405-Eng-48, DE-AC02-05CH11231, and DEAC02-76CH3073. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 704 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300226 ER PT B AU Alleno, CK Ikegami, M Sako, H Shen, G Ikeda, H Ohkawa, T Ueno, A AF Alleno, C. K. Ikegami, M. Sako, H. Shen, G. Ikeda, H. Ohkawa, T. Ueno, A. GP IEEE TI XAL online model enhancements for J-PARC commissioning and operation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The XAL application development environment has been installed as a part of the control system for the Japan Proton Accelerator Research Center (J-PARC) in Tokai, Japan. XAL was initially developed at the Spallation Neutron Source (SNS) and has been described at length in previous conference proceedings [4]. Included in XAL is an online model for doing quick physics simulations [1]. We outline the upgrades and enhancements to the XAL online model necessary for accurate simulation of the J-PARC linac and transport system. C1 [Alleno, C. K.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. [Ikegami, M.] KEK, Tsukuba, Ibaraki 3050801, Japan. [Sako, H.; Shen, G.; Ikeda, H.; Ohkawa, T.; Ueno, A.] JAEA, Tokai, Ibaraki 3191195, Japan. RP Alleno, CK (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. EM ckallen@oml.gov FU KEK FX Work supported by KEK under a foreign visiting scientist grant. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 788 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096300254 ER PT B AU Takagi, A Sugai, I Takeda, Y Irie, Y Shaw, RW Feigerle, CS Plum, MA AF Takagi, A. Sugai, I. Takeda, Y. Irie, Y. Shaw, R. W. Feigerle, C. S. Plum, M. A. GP IEEE TI Comparative study on lifetime of stripper foil using 650 keV H- ion beam SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Thick carbon stripper foils of >300 mu g/cm(2) will be used as a stripping of H-ion beam for 3GeV Rapid Cycling Synchrotron (3GeV-RCS) of the J-PARC. The carbon foils with long lifetime even at >1800 degrees K are required. For this purpose, we have developed a new irradiation system for the lifetime measurement using high current pulsed and dc H- beams of the KEK Cockcroft-Walton accelerator. These high power 750keV IT Ion beams can simulate the high energy deposition in carbon stripper foils at the J-PARC RCS. An automatic data acquisition system is also developed for recording the data of foil temperature and irradiated beam current. The Hybrid Boron mixed Carbon (BBC) stripper foils, which are developed at KEK are irradiated by high current H- ion beam up to 2000 degrees K. A few SNS-diamond and commercially available carbon (CM) foils are also tested for comparing with BBC-foils. The results of the lifetime measurement of BBC and SNS-diamond including CM stripper foils are reported. C1 [Takagi, A.; Sugai, I.; Takeda, Y.] KEK, J PARC, Tsukuba, Ibaraki 3010801, Japan. [Shaw, R. W.] ORNL, Div Chem Sci, Oak Ridge, TN 37831 USA. [Feigerle, C. S.] UT, Dept Chem, Knoxville, TN USA. [Plum, M. A.] ORNL, Spallat Neutron Source, Oak Ridge, TN USA. [Irie, Y.] JAEA, J PARC, Tokai, Ibaraki 315195, Japan. RP Takagi, A (reprint author), KEK, J PARC, Tsukuba, Ibaraki 3010801, Japan. EM akira.takagi@kek.jp FU Japan Society for the Promotion of Science [18540303] FX Work supported by by the Japan Society for the Promotion of Science, under contract No. 18540303. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 815 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301006 ER PT B AU Burrows, PN Christian, G Clarke, C Constance, B Khah, HD Hartin, T Perry, C Swinson, C Kalinin, A Molloy, S White, GR AF Burrows, P. N. Christian, G. Clarke, C. Constance, B. Khah, H. Dabiri Hartin, T. Perry, C. Swinson, C. Kalinin, A. Molloy, S. White, G. R. GP IEEE TI The FONT4 ILC intra-train beam-based digital feedback system prototype SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the design of the FONT4 intra.-train beam-based digital position feedback system prototype. The system incorporates a fast analogue beam position monitor front-end signal processor, a digital feedback board, and a fast kicker-driver amplifier. The system latency goal is less than 150ns. We report preliminary results of beam tests at the Accelerator Test Facility (ATF) at KEK using electron bunches separated by c. 150ns. C1 [Burrows, P. N.; Christian, G.; Clarke, C.; Constance, B.; Khah, H. Dabiri; Hartin, T.; Perry, C.; Swinson, C.] Univ Oxford, John Adams Inst, Oxford OX1 2JD, England. [Kalinin, A.] Daresbury Lab, Warrington, Cheshire, England. [Molloy, S.; White, G. R.] SLAC, Menlo Pk, CA 94025 USA. RP Burrows, PN (reprint author), Univ Oxford, John Adams Inst, Oxford OX1 2JD, England. RI swinson, christina/C-6782-2012 FU Commission of the European Communities [RIDS-011899]; UK Science and Technology Facilities Council FX This work is supported by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899, and by the UK Science and Technology Facilities Council. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 986 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301063 ER PT B AU DiMonte, N AF DiMonte, N. GP IEEE TI The P0 feedback control system blurs the line between IOC and FPGA SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The PO Feedback system is a new design at the Advanced Photon Source (APS) primarily intended to stabilize a single bunch in order to operate at a higher accumulated charge. The algorithm for this project required a high-speed DSP solution for a single channel that would make adjustments on a turn-by-turn basis. A field programmable gate array (FPGA) solution was selected that not only met the requirements of the project but far exceeded them. By using a single FPGA, we were able to adjust up to 324 bunches on two separate channels with a total computational time of similar to 6x 10(9) multiply-accumulate operations per second. The IOC is a Coldfire CPU tightly coupled to the FPGA, providing dedicated control and monitoring of the system through EPICS [1] process variables. One of the benefits of this configuration is having a four-channel scope in the FPGA that can be monitored on a continuous basis. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP DiMonte, N (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. EM npd@aps.anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1001 EP 1003 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301068 ER PT B AU Feng, G Deriy, B Wang, J AF Feng, Guang Deriy, Boris Wang, Ju GP IEEE TI A linear mosfet regulator for improving performance of the booster ramping power supplies at the APS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.25% while 0.1% is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbation and are not able to reject AC line noises of more than a few tens of hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a real- time current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. So far the simulation results show that with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance. This paper discusses the circuit topology, the regulation method, and the simulation results. C1 [Feng, Guang; Deriy, Boris; Wang, Ju] Argonne Natl Lab, Adv Photon Source, Power Supply Grp, Argonne, IL 60439 USA. RP Feng, G (reprint author), Argonne Natl Lab, Adv Photon Source, Power Supply Grp, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1004 EP 1006 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301069 ER PT B AU Walters, D AF Walters, Dean GP IEEE TI Aluminum coating in the undulator vacuum chamber for the linac coherence light source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A prototype vacuum chamber is under development at the Advanced Photon Source that is intended for use in the Linac Coherent Light Source at Stanford Linear Accelerator Center. The chamber will be fabricated from the austenite stainless steels. The chamber requires a continuous aluminum coating on the inner surface in order to reduce the wakefield losses to a level within the resistivity budget. The method being presented here is unique in that it can be applied to a fully fabricated chamber 5 mm high, 12.5 mm wide, and 3460 mm long. In existing methods the chamber aperture has been much larger than is used here. This paper describes a method applicable for these smaller cross sections. This process uses a pair of small electrodes, centered in the aperture, where they are attached to a high-frequency AC power supply. In this configuration each electrode is connected to the opposite polarity of the other. The chamber cavity is filled with argon gas to facilitate the formation of a glow discharge causing the aluminum electrodes to sputter onto the chamber walls. This paper presents the laboratory test results from small samples up to the fall-sized assemblies. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Walters, D (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. EM drw@aps.anl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1007 EP 1009 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301070 ER PT B AU Yao, CY Norum, E DiMonte, N AF Yao, C. -Y Norum, E. DiMonte, N. GP IEEE TI An FPGA-based bunch-to-bunch feedback system at the advanced photon source SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Photon Source storage ring has several bunch fill patterns for user operation. The hybrids fill pattern consists of a single bunch with a charge of 16 mA and a bunch train of 56 bunches. Both horizontal and vertical instabilities are observed. Currently chromaticity correction is the only method available to overcome the instability. Beam lifetime and injection efficiency suffer because of high sextupole currents. A bunch-to-bunch feedback system is designed to overcome beam instability and reduce the required chromaticity correction. The feedback system is based on an FPGA DSP processor. The signal filtering algorithm is based on the time-domain-least-square (TDLF) method developed at SPring-8. We have just completed the integration of the system. We report the system design and. some test results. C1 [Yao, C. -Y; Norum, E.; DiMonte, N.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Yao, CY (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM cyao@aps.anl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1010 EP 1012 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301071 ER PT B AU Kahn, SA Alsharo'a, M Johnson, RP Kashikhin, V Kashikhin, V Yonehara, K Zlobin, AV AF Kahn, S. A. Alsharo'a, M. Johnson, R. P. Kashikhin, Vadim Kashikhin, Vladimir Yonehara, K. Zlobin, A. V. GP IEEE TI Magnet system for helical muon cooling channels SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A helical cooling channel (HCC) consisting of a pressurized gas absorber imbedded in a magnetic channel that provides superimposed solenoidal, helical dipole, and helical quadrupole fields has shown considerable promise in providing six-dimensional cooling of muon beams. The analysis of this muon cooling technique with both analytic and simulation studies has shown significant reduction of muon phase space emittance. A particular channel that has been simulated is divided into four segments each with progressively smaller apertures and stronger fields to reduce the equilibrium emittance so that more cooling can occur. The fields in the helical channel are sufficiently large that the conductor for segments 1 and 2 can be Nb3Sn and the conductor for segments 3 and 4 may need to be high temperature superconductor. This paper will describe the magnetic specifications for the channel and two conceptual designs on how to implement the magnetic channel. C1 [Kahn, S. A.; Alsharo'a, M.; Johnson, R. P.] Muons Inc, Batavia, IL USA. [Kashikhin, Vadim; Kashikhin, Vladimir; Yonehara, K.; Zlobin, A. V.] Fermilab Natl Accelerator Lab, Batavia, IL USA. RP Kahn, SA (reprint author), Muons Inc, Batavia, IL USA. EM Kahn@muonsinc.com FU US DOE under STTR [DE-FG02-04ER86191] FX Supported by the US DOE under STTR Grant No. DE-FG02-04ER86191. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1013 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301072 ER PT B AU Kahn, SA Alsharo'a, M Johnson, RP Kuchnir, M Gupta, RC Palmer, RB Willen, E Summers, DJ AF Kahn, S. A. Alsharo'a, M. Johnson, R. P. Kuchnir, M. Gupta, R. C. Palmer, R. B. Willen, E. Summers, D. J. GP IEEE TI A high field HTS solenoid for muon cooling SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ability of high temperature superconducting (HTS) conductor to carry high currents at low temperatures makes feasible the development of very high field magnets for uses in accelerators and beam-lines. A specific application of a very high field solenoid is to provide a very small beta region for the final cooling stages for a muon collider. Since ionization cooling in a solenoid acts simultaneously on both transverse planes, any improvement in maximum field has a quadratic consequence in the reduction of the 6-dimensional (6D) beam emittance. This paper describes a conceptual design of a 45 Tesla solenoid based on Bi-2223 HTS tape, where the magnet will be operated at 4.2 K to take advantage of the high current carrying capacity at that temperature. In this design, an outer Nb3Sn shell surrounds the HTS solenoid. This paper describes the technical issues associated with building this magnet. In particular it addresses how to mitigate the large Lorentz stresses associated with the high field magnet and how to design the magnet to reduce the compressive end forces. Also this paper discusses the important issue of how to protect this magnet if a quench should occur. C1 [Kahn, S. A.; Alsharo'a, M.; Johnson, R. P.; Kuchnir, M.] Muons Inc, Batavia, IL USA. [Kuchnir, M.; Gupta, R. C.; Palmer, R. B.; Willen, E.] Brookhaven Natl Lab, Upton, NY USA. [Summers, D. J.] Univ Mississippi, Oxford, MS USA. RP Kahn, SA (reprint author), Muons Inc, Batavia, IL USA. EM Kahn@muonsin.com FU US DOE [DEAC02-98CH10886, DE-FG02-91ER40622]; US DOE STTR [DE-FG02-04ER86191] FX Supported by of the US DOE under Contracts No. DEAC02-98CH10886, DE-FG02-91ER40622, and US DOE STTR Grant No. DE-FG02-04ER86191. NR 8 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1016 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301073 ER PT B AU Drennan, C Ball, M Franck, AR Harding, DJ Kasley, PA Krafczyk, GE Kucera, MJ Lackey, J McArthur, D Misek, J Pellico, W Prebys, EJ Triplett, K Wolff, DA AF Drennan, C. Ball, M. Franck, A. R. Harding, D. J. Kasley, P. A. Krafczyk, G. E. Kucera, M. J. Lackey, J. McArthur, D. Misek, J. Pellico, W. Prebys, E. J. Triplett, K. Wolff, D. A. GP IEEE TI System overview for the multi-element corrector magnets and controls for the Fermilab Booster SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To better control the beam position, tune, and chromaticity in the Fermilab Booster synchrotron, a new package of six corrector elements has been designed, incorporating both normal and skew orientations of dipole, quadrupole; and sextupole magnets. The devices are under construction and will be installed in 48 locations in the Booster accelerator. Each of these 288 corrector magnets will be individually powered. Each of the magnets will be individually controlled using operator programmed current ramps designed specifically for each type of Booster acceleration cycle. This paper provides an overview of the corrector magnet installation in the accelerator enclosure, power and sensor interconnections, specifications for the switch-mode power supplies, rack and equipment layouts, controls and interlock electronics, and the features of the operator interface for programming the current ramps and adjusting the timing of the system triggers. C1 [Drennan, C.; Ball, M.; Franck, A. R.; Harding, D. J.; Kasley, P. A.; Krafczyk, G. E.; Kucera, M. J.; Lackey, J.; McArthur, D.; Misek, J.; Pellico, W.; Prebys, E. J.; Triplett, K.; Wolff, D. A.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Drennan, C (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cdrennan@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1019 EP 1021 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301074 ER PT B AU Harding, DJ DiMarco, J Drennan, CC Kashikhin, VS Kotelnikov, S Lackey, JR Makarov, A Makulski, A Nehring, RH Orris, DF Prebys, EJ Schlabach, P Velev, GV Walbridge, DG AF Harding, D. J. DiMarco, J. Drennan, C. C. Kashikhin, V. S. Kotelnikov, S. Lackey, J. R. Makarov, A. Makulski, A. Nehring, R. H. Orris, D. F. Prebys, E. J. Schlabach, P. Velev, G. V. Walbridge, D. G. GP IEEE TI Design and fabrication of a multi-element corrector magnet for the Fermilab Booster synchrotron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To better control the beam position, tune, and chromaticity in the Fermilab Booster synchrotron, a new package of six corrector elements has been designed, incorporating both normal and skew orientations of dipole, quadrupole, and sextupole magnets. The devices are under construction and installation at 48 locations is planned. The density of elements and the rapid slew rate have posed special challenges. The magnet construction is presented along with DC measurements of the magnetic field. C1 [Harding, D. J.; DiMarco, J.; Drennan, C. C.; Kashikhin, V. S.; Kotelnikov, S.; Lackey, J. R.; Makarov, A.; Makulski, A.; Nehring, R. H.; Orris, D. F.; Prebys, E. J.; Schlabach, P.; Velev, G. V.; Walbridge, D. G.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Harding, DJ (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM harding@fnal.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1022 EP 1024 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301075 ER PT B AU Harding, DJ Bartelson, L Brown, BC Carson, JA Chou, W DiMarco, J Glass, HD Johnson, DE Kashikhin, VS Kourbanis, I Robotham, WR Tartaglia, M AF Harding, D. J. Bartelson, L. Brown, B. C. Carson, J. A. Chou, W. DiMarco, J. Glass, H. D. Johnson, D. E. Kashikhin, V. S. Kourbanis, I. Robotham, W. R. Tartaglia, M. GP IEEE TI A wide aperture quadrupole for the Fermilab Main Injector synchrotron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB During the design of the Fermilab Main Injector synchrotron it was recognized that the aperture was limited at the beam transfer and extraction points by the combination of the Lambertson magnets and the reused Main Ring quadrupoles located between the Lambertsons. Increased intensity demands on the Main Injector from antiproton production for the collider program, slow spill to the meson fixed target program, and high intensity beam to the high energy neutrino program have led us to replace the aperture-limiting quadrupoles with newly built magnets that have the same physical length but a larger aperture. The magnets run on the main quadrupole bus, and must therefore have the same excitation profile as the magnets they replaced. We present here the design of the magnets, their magnetic performance, and the accelerator performance. C1 [Harding, D. J.; Bartelson, L.; Brown, B. C.; Carson, J. A.; Chou, W.; DiMarco, J.; Glass, H. D.; Johnson, D. E.; Kashikhin, V. S.; Kourbanis, I.; Robotham, W. R.; Tartaglia, M.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Harding, DJ (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM harding@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1025 EP 1027 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301076 ER PT B AU Hu, M Broemmelsiek, DR Chase, B Crisp, JL Eddy, N Joireman, PW Ng, KY AF Hu, Martin Broemmelsiek, Daniel Robert Chase, Brian Crisp, James L. Eddy, Nathan Joireman, Paul W. Ng, King Yuen GP IEEE TI Uniform longitudinal beam profiles in the fermilab recycler using adaptive RF correction SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Fermilab Recycler Ring is a permanent magnet based 8 GeV anti-proton storage ring. A wideband RF system, driven with ARB's (ARBitrary waveform generators), allows the system to produce programmable barrier waveforms. Beam current profile distortion was observed, its origin verified both experimentally and theoretically, and an FPGA-based correction system was designed, tested and implemented to level the bunch profile. C1 [Hu, Martin; Broemmelsiek, Daniel Robert; Chase, Brian; Crisp, James L.; Eddy, Nathan; Joireman, Paul W.; Ng, King Yuen] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Hu, M (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM martinhu@fnal.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1028 EP 1030 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301077 ER PT B AU Kashikhin, V Kashikhin, V Lamm, MJ Romanov, G Yonehara, K Zlobin, AV Johnson, RP Kahn, SA Roberts, T AF Kashikhin, Vladimir Kashikhin, Vadim Lamm, Michael Joseph Romanov, Gennady Yonehara, Katsuya Zlobin, Alexander V. Johnson, Rolland Paul Kahn, Stephen Alan Roberts, Thomas GP IEEE TI Magnets for the MANX 6-D muon cooling demonstration experiment SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB MANX is a 6-dimensional muon ionization-coolffig experiment that has been proposed to Fermilab to demonstrate the use of a Helical Cooling Channel (HCC) for future muon colliders and neutrino factories. The HCC for MANX has solenoidal, helical dipole, and helical quadrupole magnetic components which diminish as the beam loses energy as it slow down in a liquid helium absorber inside the magnets. Additional magnets that provide emittance matching between the HCC and upstream and downstream spectrometers are also described as are the results of G4Beamline simulations of the beam cooling behavior of the complete magnet and absorber system. C1 [Kashikhin, Vladimir; Kashikhin, Vadim; Lamm, Michael Joseph; Romanov, Gennady; Yonehara, Katsuya; Zlobin, Alexander V.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Johnson, Rolland Paul; Kahn, Stephen Alan; Roberts, Thomas] Muons Inc, Batavia, IL 60510 USA. RP Kashikhin, V (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM kash@fnal.gov FU STTR [DE-FG02-04ER86191, DE-FG02-06ER86282] FX Supported by STTR Grants DE-FG02-04ER86191 and -06ER86282. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1031 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301078 ER PT B AU Kashikhin, VV Zlobin, AV AF Kashikhin, Vadim V. Zlobin, Alexander V. GP IEEE TI Design study of 2-in-1 large-aperture IR dipole (D2) for the LHC luminosity upgrade SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB This paper analyses possible D2 magnet designs for the "dipole-first" option of the LHC luminosity upgrade based on Nb(3)Sn superconductor and compares them in terms of the maximum field, field quality, and Lorentz forces in the coils. C1 [Kashikhin, Vadim V.; Zlobin, Alexander V.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kashikhin, VV (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM vadim@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1034 EP 1036 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301079 ER PT B AU Zlobin, AV Ambrosio, G Andreev, N Barzi, E Bossert, R Carcagno, R Chlachidze, G DiMarco, J Feher, S Kashikhin, VS Kashikhin, VV Lamm, MJ Nobrega, F Novitski, I Orris, D Pischalnikov, Y Schlabach, P Sylvester, C Tartaglia, M Tompkins, JC Turrioni, D Velev, G Yamada, R AF Zlobin, A. V. Ambrosio, G. Andreev, N. Barzi, E. Bossert, R. Carcagno, R. Chlachidze, G. DiMarco, J. Feher, S. Kashikhin, V. S. Kashikhin, V. V. Lamm, M. J. Nobrega, F. Novitski, I. Orris, D. Pischalnikov, Yu. Schlabach, P. Sylvester, C. Tartaglia, M. Tompkins, J. C. Turrioni, D. Velev, G. Yamada, R. GP IEEE TI Nb3Sn accelerator magnet technology R&D at Fermilab SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Accelerator magnets based on Nb(3)Sn supercondutor are being developed at Fermilab. Six nearly identical 1-m long dipole models and several mirror configurations were built and tested demonstrating magnet performance parameters and their reproducibility. The technology scale up program has started by building and testing long dipole coils. The results of this work are reported in the paper. C1 [Zlobin, A. V.; Ambrosio, G.; Andreev, N.; Barzi, E.; Bossert, R.; Carcagno, R.; Chlachidze, G.; DiMarco, J.; Feher, S.; Kashikhin, V. S.; Kashikhin, V. V.; Lamm, M. J.; Nobrega, F.; Novitski, I.; Orris, D.; Pischalnikov, Yu.; Schlabach, P.; Sylvester, C.; Tartaglia, M.; Tompkins, J. C.; Turrioni, D.; Velev, G.; Yamada, R.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Zlobin, AV (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM zlobin@fnal.gov NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1052 EP 1054 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301085 ER PT B AU De Santis, S Urakawa, J Naito, T AF De Santis, S. Urakawa, J. Naito, T. GP IEEE TI Fast extraction kicker for the accelerator test facility SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the results of a study for the design of a fast extraction kicker to be installed in the Accelerator Test Facility ring at KEK. This activity is carried on in the framework of the ATF2 project, which will be built on the KEK Tsukuba campus as an extension of the existing ATF, taking advantage of the world's smallest normalized emittance achieved there. ATF2's primary goal is to operate as a test facility and establish the hardware and beam handling technologies envisaged for the International Linear Collider. In particular, the fast extraction kicker object of the present paper is an important component of the ILC damping rings, since its rise and fall time define the minimum distance between bunches and ultimately the damping rings length itself. Building on the initial results presented at EPAC '06, we report on the present status of the kicker design and define the minimum characteristics for pulsers and other subsystems. In addition to the original scheme with multiple stripline modules producing a total deflection of 5 mrad, we also investigated a scheme with a single kicker module for a reduced deflection of I mrad placed inside a closed orbit bump, which takes the electron closer to the extraction septum. C1 [De Santis, S.] LBNL, Berkeley, CA USA. [Urakawa, J.; Naito, T.] KEK, Ibaraki, Japan. RP De Santis, S (reprint author), LBNL, Berkeley, CA USA. FU U.S. Department of Energy [DE-AC0-05CH11231] FX Work supported by the U.S. Department of Energy under Contract No. DE-AC0-05CH11231. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1055 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301086 ER PT B AU Marks, S Kennedy, K Plate, D Schlueter, RD Zisman, M AF Marks, S. Kennedy, K. Plate, D. Schlueter, R. D. Zisman, M. GP IEEE TI Conceptual design of Ilc damping ring wiggler straight vacuum system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The positron and electron damping rings for the International Linear Collider will contain long straight sections consisting of twenty wiggler/quadrupole pairs. The wigglers will be based upon the CESR superconducting design. There are a number of challenges associated with the design of the wiggler straight vacuum system, in particular, the absorption of photon power generated by the wigglers. This paper will present the overall conceptual design of the wiggler straight vacuum system developed for the ILC Reference Design Report. Particular emphasis will be placed on photon power load calculations and the absorber design. C1 [Marks, S.; Kennedy, K.; Plate, D.; Schlueter, R. D.; Zisman, M.] LBNL, Berkeley, CA 94720 USA. RP Marks, S (reprint author), LBNL, Berkeley, CA 94720 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1058 EP 1060 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301087 ER PT B AU Mokhov, NV Kashikhin, VV Monville, ME Ferracin, P Sabbi, GL AF Mokhov, N. V. Kashikhin, V. V. Monville, M. E. Ferracin, P. Sabbi, G. L. GP IEEE TI Energy deposition studies of block-coil quadrupoles for the LHC luminosity upgrade SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB At the LHC upgrade luminosity of 10(35) cm(-2) 2 s(-1), collision product power in excess of a kW is deposited in the inner triplet quadrupoles. The quadrupole field sweeps secondary particles from pp-collisions into the superconducting (SC) coils, concentrating the power deposition at the magnetic mid-planes. The local peak power density can substantially exceed the conductor quench limits and reduce component lifetime. Under these conditions, block-coil geometries may result in overall improved performance by removing the superconductor from the magnetic mid-planes and/or allowing increased shielding at such locations. First realistic energy deposition simulations are performed for an interaction region based on block-coil quadrupoles with parameters suitable for the LHC upgrade. Results are presented on distributions of power density and accumulated dose in the inner triplet components as well as on dynamic heat loads on the cryogenic system. Optimization studies are performed on configuration and parameters of the beam pipe, cold bore and cooling channels. The feasibility of the proposed design is discussed. C1 [Mokhov, N. V.; Kashikhin, V. V.; Monville, M. E.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Ferracin, P.; Sabbi, G. L.] LBNL, Berkeley, CA 94720 USA. RP Mokhov, NV (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM mokhov@fnal.gov FU Fermi Research Alliance; LLC [DE-AC02-07CH11359]; U.S. Department of Energy [DE-AC02-07CH11359] FX Work supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1061 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301088 ER PT B AU Staples, JW Wilcox, R Byrd, JM AF Staples, J. W. Wilcox, R. Byrd, J. M. GP IEEE TI Demonstration of femtosecond-phase stabilization in 2km optical fiber SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Long-term phase drifts of less than a femtosecond per hour have been demonstrated in a 2 km length of singlemode optical fiber, stabilized interferometrically at 1530 run. Recent improvements include a wide-band phase detector that reduces the possibility of fringe jumping due to fast external perturbations of the fiber and locking of the master CW laser wavelength to an atomic absorption line. Mode-locked lasers may be synchronized using two wave lengths of the comb, multiplexed over one fiber, each wavelength individually interferometrically stabilized. C1 [Staples, J. W.; Wilcox, R.; Byrd, J. M.] LBNL, Berkeley, CA 94720 USA. RP Staples, JW (reprint author), LBNL, Berkeley, CA 94720 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1064 EP 1066 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301089 ER PT B AU Virostek, SP Green, MA Li, D Zisman, MS AF Virostek, S. P. Green, M. A. Li, D. Zisman, M. S. GP IEEE TI Progress on the design and fabrication of the mice spectrometer solenoids SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID THERMAL DESIGN; MAGNET AB The Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling in a short section of a realistic cooling channel using a muon beam at Rutherford Appleton Laboratory (RAL) in the UK. A five-coil, superconducting spectrometer solenoid magnet at each end of the cooling channel will provide a 4 T uniform field region for the scintillating fiber tracker within the magnet bore tubes. The tracker modules are used to measure the muon beam emittance as it enters and exits the cooling channel. The cold mass for the 400 mm warm bore magnet consists of two sections: a three-coil spectrometer magnet and a two-coil matching section that matches the uniform field of the solenoid into the MICE cooling channel. The spectrometer solenoid detailed design and analysis has been completed, and the fabrication of the magnets is well under way. The primary features of the spectrometer solenoid magnet and mechanical designs are presented along with a summary of key fabrication issues and photos of the construction. C1 [Virostek, S. P.; Green, M. A.; Li, D.; Zisman, M. S.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Virostek, SP (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1067 EP 1069 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301090 ER PT B AU Green, MA Li, D Virostek, SP Wang, L Wu, H Li, LK Li, SY Xu, FY Guo, XL Liu, CS Han, G Liu, XK Jia, LX AF Green, M. A. Li, D. Virostek, S. P. Wang, L. Wu, H. Li, L. K. Li, S. Y. Xu, F. Y. Guo, X. L. Liu, C. S. Han, G. Liu, X. K. Jia, L. X. GP IEEE TI Progress on the design of the coupling coils for mice and mucool SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Muon Ionization Cooling Experiment (MICE) [11 will demonstrate ionization cooling in a short section of a realistic cooling channel using a muon beam at Rutherford Appleton Laboratory (RAL) in the UK. The MICE RF and Coupling Coil (RFCC) Module consists of a superconducting solenoid mounted around four normal conducting 201.25-MHz RF cavities. The coil package that surrounds the RF cavities is to be mounted in a 1.4 m diameter vacuum vessel. The coupling coil confines the beam in the RFCC module within the radius of the RF cavity beam windows. Each coupling magnet will be powered by a 300 A, 10 V power supply. The maximum design longitudinal force that will be carried by the cold mass support system is 0.5 MN. The detailed design and analysis of the coupling magnet has been completed by ICST. The primary magnetic and mechanical design features of the coils are presented in this paper. C1 [Green, M. A.; Li, D.; Virostek, S. P.] Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Wang, L.; Wu, H.; Li, L. K.; Li, S. Y.; Xu, F. Y.; Guo, X. L.; Liu, C. S.; Han, G.; Liu, X. K.; Jia, L. X.] HIT, Inst Cryogen & Supercond Technol, Harbin, Peoples R China. RP Green, MA (reprint author), Lawrence Berkeley Lab, Berkeley, CA 94720 USA. FU Lawrence Berkeley Laboratory; U.S. Department of Energy [DE-AC02-05CH11231] FX This work was supported by the Lawrence Berkeley Laboratory and the Office of Science, U.S. Department of Energy under Contract No. DE-AC02-05CH11231. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1070 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301091 ER PT B AU Weber, J Chin, M Timossi, C Williams, E AF Weber, J. Chin, M. Timossi, C. Williams, E. GP IEEE TI Hardware and software development and integration in an FPGA embedded processor based control system module for the ALS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The emergence of Field Programmable Gate Arrays (FPGAs) with embedded processors and significant progress in their development tools have contributed to the realization of system-on-a-chip networked front-end systems [1]. Embedded processors are capable of running full-fledged Real-Time Operating Systems (RTOSs) and serving channels via Ethernet while high speed hardware functions, such as digital signal processing and high performance interfaces, run simultaneously in the FPGA logic [2]. Despite significant advantages of the system-on-a-chip implementation, engineers have shied away from designing such systems due to the perceived daunting task of integrating software to run a RTOS with custom hardware. However, advances in embedded development tools considerably reduce the effort required for software/hardware integration. This paper will describe the implementation and integration of software and hardware in an FPGA embedded processor system as illustrated by the design of a new control system module for the Advanced Light Source (ALS) at Lawrence Berkeley National Lab (LBNL). C1 [Weber, J.; Chin, M.; Timossi, C.; Williams, E.] LBNL, Berkeley, CA 94720 USA. RP Weber, J (reprint author), LBNL, Berkeley, CA 94720 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1073 EP 1075 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301092 ER PT B AU Messmer, P Ranjbar, V Wade-Stein, D Schoessow, P AF Messmer, P. Ranjbar, V. Wade-Stein, D. Schoessow, P. GP IEEE TI Advanced accelerator control and instrumentation modules based on FPGA SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Field Programmable Gate Arrays (FPGAs) offer a powerful alternative to Application Specific Integrated Circuits (ASIC) or general purpose processors in accelerator control applications. Software development for these devices can be awkward and time consuming, however, when using low level hardware design languages. To facilitate the use of FPGAs in control systems we are developing a library of software tools based on ImpulseC, a high level subset of the C language specifically designed for FPGA programming. Development and testing of the software will be performed on a Xilinx Virtex-4 FPGA demo board. Here we present initial results of algorithms of relevance to controls applications implemented in Impulse C. C1 [Messmer, P.; Ranjbar, V.; Wade-Stein, D.] Tech X Corp, Boulder, CO 80303 USA. [Schoessow, P.] LLC, Euclid Tech Labs, Rockville, MD 20850 USA. [Schoessow, P.] ANL, JG Power, Argonne, IL 60439 USA. RP Messmer, P (reprint author), Tech X Corp, Boulder, CO 80303 USA. EM messmer@txcorp.com FU U.S. DOE [DE-FG02-06ER84486] FX Work supported by U.S. DOE Office of Science, Office of High Energy Physics, under grant DE-FG02-06ER84486. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1076 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301093 ER PT B AU Chouhan, S Bollen, G Guenaut, C Lawton, D Marti, F Morrissey, D Ottarson, J Pang, GK Schwarz, S Sherrill, B Zeller, A Barzi, E AF Chouhan, Shailendra Bollen, Georg Guenaut, Celine Lawton, Don Marti, Felix Morrissey, David Ottarson, Jack Pang, Greg Keith Schwarz, Stefan Sherrill, Bradley Zeller, Al Barzi, Emanuela GP IEEE TI Design of superferric magnet for the cyclotron gas stopper project at the NSCL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the design of a superferric cyclotron gas stopper magnet that has been proposed for use at the NSCL/ MSU to stop the radioactive ions produced by fragmentation at high energies (similar to 140 MeV/u). The magnet is a split solenoid-dipole with three sectors (B-ave similar to 2.7 T at the center and 1.7 T at the pole-edge.) The magnet outer diameter is 3.8m, with a pole radius of 1.1m and B*rho= 1.7 T-m. The field shape is obtained by extensive profiles in the iron. The coil cross-section is 80 mm x 80 mm and peak field induction on the conductor is about 2.05 T. The upper and lower coils are in separate cryostats and have warm electrical connections. We present the coil. winding and the protection schemes. The forces are large and the implications on the support structure are presented. C1 [Chouhan, Shailendra; Bollen, Georg; Guenaut, Celine; Lawton, Don; Marti, Felix; Morrissey, David; Ottarson, Jack; Pang, Greg Keith; Schwarz, Stefan; Sherrill, Bradley; Zeller, Al] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. [Barzi, Emanuela] Fermi Natl Lab, Batavia, IL 60510 USA. RP Chouhan, S (reprint author), Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. EM chouhan@nscl.msu.edu FU DOE [DE-FG02-06ER41413]; NSF [0606007]; Michigan State University FX Supported by DOE Grant DE-FG02-06ER41413, NSF Grant 0606007 and Michigan State University. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1094 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301099 ER PT B AU Shverdin, MY Anderson, SG Betts, SM Gibson, DJ Hartemann, FV Hernandez, JE Johnson, M Jovanovic, I McNabb, DP Messerly, M Pruet, J Tremaine, AM Siders, CW Barty, CPJ AF Shverdin, M. Y. Anderson, S. G. Betts, S. M. Gibson, D. J. Hartemann, F. V. Hernandez, J. E. Johnson, M. Jovanovic, I. McNabb, D. P. Messerly, M. Pruet, J. Tremaine, A. M. Siders, C. W. Barty, C. P. J. GP IEEE TI Fiber-based, spatially and temporally shaped picosecond UV laser for advanced rf gun applications SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The fiber-based, spatially and temporally shaped, picosecond UV laser system described here has been specifically designed for advanced rf gun applications, with a special emphasis on the production of high-brightness electron beams for free-electron lasers and Compton scattering light sources. The laser pulse can be shaped to a flat-top in both space and time with a duration of 10 ps at full width of half-maximum (FWHM) and rise and fall times under 1 ps. The expected pulse energy is 50,0 at 261.75 nm and the spot size diameter of the beam at the photocathode is 2 mm. A fiber oscillator and amplifier system generates a chirped pump pulse at 1047 nm; stretching is achieved in a chirped fiber Bragg grating. A single multi-layer dielectric grating based compressor recompresses the input pulse to 250 fs FWHM and a two stage harmonic converter frequency quadruples the beam. Temporal shaping is achieved with a Michelson-based ultrafast pulse stacking device with nearly 100% throughput. Spatial shaping is achieved by truncating the beam at the 20% energy level with an iris and relay-imaging the resulting beam profile onto the photocathode. The integration of the system, as well as preliminary laser measurements will be presented. C1 [Shverdin, M. Y.; Anderson, S. G.; Betts, S. M.; Gibson, D. J.; Hartemann, F. V.; Hernandez, J. E.; Johnson, M.; Jovanovic, I.; McNabb, D. P.; Messerly, M.; Pruet, J.; Tremaine, A. M.; Siders, C. W.; Barty, C. P. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Shverdin, MY (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM shverdin2@llnl.gov NR 5 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1103 EP 1105 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301102 ER PT B AU Borden, MJ O'Hara, JF Perez, EM Roller, BJ Vigil, VP Walker, LS AF Borden, Michael J. O'Hara, James F. Perez, Edward M. Roller, Brandon J. Vigil, Victor P. Walker, Lawrence S. GP IEEE TI LANSCE radiation resistant water manifold retrofit for DC magnets SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Large maintenance dose burdens have necessitated the development of radiation resistant water manifolds for use on DC magnets in the Proton Storage Ring (PSR), at the Los Alamos Neutron Science Center (LANSCE) accelerator. This paper will describe dose measurements and the mechanical design of radiation-resistant water manifolds used in PSR. C1 [Borden, Michael J.; O'Hara, James F.; Perez, Edward M.; Roller, Brandon J.; Vigil, Victor P.; Walker, Lawrence S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Borden, MJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1106 EP 1108 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301103 ER PT B AU Borden, MJ Chapman, CA Kelsey, CT O'Hara, JF Sturrock, JC AF Borden, Michael J. Chapman, Catherine A. Kelsey, Charles T. O'Hara, James F. Sturrock, James C. GP IEEE TI LANSCE fail-safe radiation shutter design for Isotope Production Facility SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Dose rate modeling and post irradiation measurements of the Isotope Production Facility (IPF) beamline, at the Los Alamos Neutron Science Center (LANSCE) accelerator have determined that a radiation shielding shutter is required to protect personnel from shine from irradiated targets for routine beam tunnel entries. This paper will describe radiation dose modeling, shielding calculations, and the fail-safe mechanical shutter design. C1 [Borden, Michael J.; Chapman, Catherine A.; Kelsey, Charles T.; O'Hara, James F.; Sturrock, James C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Borden, MJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1109 EP 1111 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301104 ER PT B AU Bradley, J Roybal, W Reass, W Sandoval, J Fresquez, M Fernandez, L Andrews, C AF Bradley, J., III Roybal, W. Reass, W. Sandoval, J. Fresquez, M. Fernandez, L. Andrews, C. GP IEEE TI Quantitative evaluation of magnet hysteresis effects at LANSCE with respect to Magnet Power Supply specifications SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The proton beam in the LANSCE accelerator is guided and focused almost exclusively by electromagnets. Magnet hysteresis has had significant impacts on the tuning of the LANSCE accelerator [1]. Magnet hysteresis can also have an impact on Magnet Power Supply (MPS) control, regulation and repeatability requirements. To date, WS performance requirements have been driven by the requirements on the magnetic fields as determined by the accelerator physicists. Taking hysteresis effects into account can significantly change MPS requirements, as some requirements become more stringent and some are found to be over specified. Overspecification of WS requirements can result in significant increases in MPS cost. Conversely, the use of appropriate MPS requirements can result in significant cost savings. The LANSCE accelerator's more than three decades of operation provide a wide variety of MPS technologies and operational experience. We will survey the LANSCE MPS history and determine how performance specifications can be refined to both reduce costs and improve the operators abilities to control the magnetic fields. C1 [Bradley, J., III; Roybal, W.; Reass, W.; Sandoval, J.; Fresquez, M.; Fernandez, L.; Andrews, C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bradley, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1112 EP 1114 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301105 ER PT B AU Kurennoy, SS AF Kurennoy, Sergey S. GP IEEE TI Ceramic-supported traveling-wave structures for SNS fast beam chopper SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The current structure for the fast 2.5-MeV beam chopper for the Spallation. Neutron Source (SNS) project was originally developed [1] to provide rise and fall times around 1 ns. The structure is based on the meander-folded notched strip line with low-dielectric-constant supports and metal separators. Since then the requirements of the chopper rise-time has been significantly relaxed, up to 10 ns, as a result of beam dynamics simulations and to simplify the voltage pulse generators. In addition, initial runs with the beam showed that this structure was prone to damage when accidental beam spins occurred. We suggest alternative meander structures for the SNS chopper that employ high-dielectric-constant substrate (e.g., alumina). Time-domain simulations show their electromagnetic performance to be well within the requirements, while their resistance to beam spins and thermal properties are expected to be much better and fabrication significantly simpler. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kurennoy, SS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM kurennoy@lanl.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1115 EP 1117 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301106 ER PT B AU McCrady, R Macek, R Zaugg, T Assadi, S Deibele, C Henderson, S Plum, M Lee, SY Walbridge, S Byrd, J Pivi, M AF McCrady, R. Macek, R. Zaugg, T. Assadi, S. Deibele, C. Henderson, S. Plum, M. Lee, S. Y. Walbridge, S. Byrd, J. Pivi, M. GP IEEE TI Active damping of the e-p instability at the LANL PSR SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos National Laboratory Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). Evidence obtained from these tests suggests that further improvement in performance is limited by beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback. Here we describe the present system configuration, system optimization, results of several recent experimental tests, and results from studies of factors limiting its performance. C1 [McCrady, R.; Macek, R.; Zaugg, T.] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. [Assadi, S.; Deibele, C.; Henderson, S.; Plum, M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Lee, S. Y.; Walbridge, S.] Indiana Univ, Bloomington, IN 47405 USA. [Byrd, J.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Pivi, M.] SLAC, Menlo Pk, CA 94025 USA. RP McCrady, R (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. FU United States Department of Energy [W-7405-ENG-36 (LANL), DE-AC52-06NA25396 (LANL), DE-AC05-00OR22725 (ORNL), DE-AC02-05CH11231 (LBNL), DE-FG0292ER40747 (IU)]; National Science Foundation [PHY-0552389 (IU)] FX Work supported by the United States Department of Energy under contracts W-7405-ENG-36 (LANL), DE-AC52-06NA25396 (LANL), DE-AC05-00OR22725 (ORNL), DE-AC02-05CH11231 (LBNL), DE-FG0292ER40747 (IU), and the National Science Foundation under contract NSF PHY-0552389 (IU). NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1118 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301107 ER PT B AU Olivas, ER AF Olivas, E. R. GP IEEE TI Finite element analysis of metallic thin window: An iterative process SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Thin windows are devices required by some particle accelerator physics experiments. These windows must be thin and light enough so they have a minimum effect on the beam. However, due to the boundary and loading conditions a window might observe; nonlinear structural behavior can occur from a number of different causes, such as geometric and material nonlinearities. If a structure experiences large plastic deformation, its changing geometric relationship can cause the structure to respond in a nonlinear manner. Material nonlinearities occur when the material's stress-strain relation depends on the load history as in plasticity models. The method of analysis for this study entails an FEA analysis, in which the stress and displacement are solved for a metallic membrane; these results are then compared to results obtained from an iterative process in relating the stress and strain with respect to the deformed geometry of the membrane. In addition, experimental tests will be carried out to determine the membrane displacement from a prescribed load. The study is conducted on 1145-O series Al. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Olivas, ER (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1121 EP 1123 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301108 ER PT B AU Pieck, M Bjorklund, EA Carr, G Faucett, JA Hill, JO Kerstiens, DM Marroquin, PS Oothoudt, MA Schaller, S McGehee, PM AF Pieck, Martin Bjoerklund, Eric A. Carr, Gary Faucett, John A. Hill, Jeffrey O. Kerstiens, Debora M. Marroquin, Pilar S. Oothoudt, Michael A. Schaller, Stuart McGehee, Peregrine M. GP IEEE TI The LANSCE control system current state and upgrade outlook SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The LANSCE (Los Alamos Neutron Science Center) runs its LINAC control system based on 30(+) year old technology. While some peripheral upgrades have been made over the years, the control system win need some major improvements over the next five years in order to continue to support the user facility's mission. The proposed multi-million dollar LANSCE-R (Refurbishment) project creates a unique opportunity to upgrade the existing control system. We intend to use the EPICS (Experimental Physics and Industrial Control System) control system with the following goals for effective control at modest cost: (1) Replacing our VMS based MicroVAXes; (2) Replacing the RICE (Remote Instrumentation and Control Equipment) subsystem with Programmable Logic Controllers (PLCs) to handle regular data acquisition and control, and custom hardware to handle "flavored!' data acquisition; (3) Replacing the Master Timer subsystem with a modem event system; (4) Converting Fortran programs running on VAX/VMS computers to Java Programs running on Linux-based desktop PCs. The boundary condition, as usual, is that we must implement these major changes on a running accelerator. C1 [Pieck, Martin; Bjoerklund, Eric A.; Carr, Gary; Faucett, John A.; Hill, Jeffrey O.; Kerstiens, Debora M.; Marroquin, Pilar S.; Oothoudt, Michael A.; Schaller, Stuart] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. [McGehee, Peregrine M.] CALTECH, Pasadena, CA 91125 USA. RP Pieck, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM pieck@lanl.gov FU Los Alamos Neutron Science Center at the Los Alamos National Laboratory; US Department of Energy; NSSA [DE-AC52-06NA25396]; [LA-UR-07-3928] FX This work has benefited from the use of the Los Alamos Neutron Science Center at the Los Alamos National Laboratory. This facility is funded by the US Department of Energy and operated by Los Alamos National Security for NSSA under Contract DE-AC52-06NA25396. Paper LA-UR-07-3928. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1124 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301109 ER PT B AU Olivas, FR Borden, MJ Canabal, A Chamberlin, J Harrison, J Oothoudt, M Sullivan, J Tajima, T AF Olivas, F. R. Borden, M. J. Canabal, A. Chamberlin, J. Harrison, J. Oothoudt, M. Sullivan, J. Tajima, T. GP IEEE TI LANSCE vacuum system improvements for higher reliability and availability SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Los Alamos Neutron Science Center (LANSCE) accelerator, an 800-MeV proton linac with a storage ring, has been operated over 30 years since early 1970s. Due to the aging and radiation damage of equipment, cables and connectors, the number of troubles is increasing. In order to reduce the time for unscheduled maintenance, we have implemented a system to catch a symptom of degrading vacuum and send an email automatically. We have been testing this system since July 2006. This paper describes LANSCE vacuum systems, the new alert system and our experience. In addition, we will describe our plan for modernizing the vacuum system in the next few years. C1 [Olivas, F. R.; Borden, M. J.; Canabal, A.; Chamberlin, J.; Harrison, J.; Oothoudt, M.; Sullivan, J.; Tajima, T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Olivas, FR (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM folivas@lanl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1127 EP 1129 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301110 ER PT B AU Chan, A Bellomo, P Crane, GR Emma, P Grunhaus, E Luchini, K MacGregor, IA Marsh, DS Pope, R Prickett, P Rago, C Ratcliffe, K Shab, T AF Chan, A. Bellomo, P. Crane, G. R. Emma, P. Grunhaus, E. Luchini, K. MacGregor, I. A. Marsh, D. S. Pope, R. Prickett, P. Rago, C. Ratcliffe, K. Shab, T. GP IEEE TI Database applications to integrate beam line optics changes with engineering databases SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The LCLS project databases provide key nomenclature information while integrating many engineering and physics processes in the building of an accelerator. Starting with the elements existing in the beam line optics files, the engineers add non-beam-line elements, and controls engineers assign 'Formal Device Names' to these elements. Inventory, power supplies, racks, crates and cable plants are databases that are being integrated into the project database. This approach replaces individual spreadsheets and/or integrates standalone existing institutional databases. C1 [Chan, A.; Bellomo, P.; Crane, G. R.; Emma, P.; Grunhaus, E.; Luchini, K.; MacGregor, I. A.; Marsh, D. S.; Pope, R.; Prickett, P.; Rago, C.; Ratcliffe, K.; Shab, T.] SLAC, Menlo Pk, CA 94025 USA. RP Chan, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM achan@slac.stanford.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1133 EP 1135 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301112 ER PT B AU Wittmer, W Colocho, W White, G AF Wittmer, W. Colocho, W. White, G. GP IEEE TI A parallel controls software approach for PEP II: AIDA & MATLAB middle layer SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The controls software in use at PEP II (Stanford Control Program - SCP) had originally been developed in the eighties. It is very successful in routine operation but due to its internal structure it is difficult and time consuming to extend its functionality. This is problematic during machine development and when solving operational issues. Routinely, data has to be exported from the system, analyzed offline, and calculated settings have to be reimported. Since this is a manual process, it is time consuming and effor-prone. Setting up automated processes, as is done for MIA (Model Independent Analysis), is also time consuming and specific to each application. Recently, there has been a trend at light sources to use MATLAB[1] as the platform to control accelerators using a "MATLAB Middle Layer" [2] (MML), and so called channel access (CA) programs to communicate with the low level control system (LLCS). This has proven very successful, especially during machine development time and trouble shooting. A special CA code, named AIDA (Accelerator Independent Data Access [3]), was developed to handle the communication between MATLAB, modem software frameworks, and the SCR The MML had to be adapted for implementation at PEP H. Colliders differ significantly in their designs compared to light sources, which poses a challenge. PEP H is the first collider at which this implementation is being done. We will report on this effort, which is still ongoing. C1 [Wittmer, W.; Colocho, W.; White, G.] SLAC, Menlo Pk, CA 94025 USA. RP Wittmer, W (reprint author), SLAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM wittmer@slac.stanford.edu NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1136 EP 1138 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301113 ER PT B AU Lam, B Bellomo, P de Lira, AC MacNair, D AF Lam, B. Bellomo, P. de Lira, A. C. MacNair, D. GP IEEE TI ILC-ATF2 DC-magnet power supplies SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In 2008 KEK is commissioning ATF2 - an extension to the existing ATF. ATF2 is a mockup of the final focus test beam accelerator envisioned in the ILC. SLAC is designing the power supply systems for the dc magnets in the ATF2, which will require 38 power supplies ranging from 1.5 kW to 6 M, and currents from 50 A to 200 A, all rated at output voltages not higher than 30 V. Because of the extensive quantities of magnets required for the ILC, high availability is paramount to its successful operation, so the power supply topology chosen for the ATF2 uses N+1 redundancy, with 50-A power modules to construct each power supply. These power modules are current-mode buck converters, which operate in parallel with each other and one redundant module. One bulk power supply provides off-the-line regulated dc input to a number of the power supply systems. Current stability requirements for the magnets range from 10 to 1000 ppm. A precision current transductor and a recently developed SLAC-built 20-bit Ethernet power supply controller will provide the current regulation required. In this paper we present the conceptual design, prototype results, and the status of the power supply systems for the ATF2. C1 [Lam, B.; Bellomo, P.; de Lira, A. C.; MacNair, D.] SLAC, Menlo Pk, CA 94025 USA. RP Lam, B (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM bri@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1139 EP 1141 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301114 ER PT B AU Rivetta, C Akre, R Cutino, P Frisch, J Kotturi, K AF Rivetta, C. Akre, R. Cutino, P. Frisch, J. Kotturi, K. GP IEEE TI LCLC RF gun feedback control SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The LCLC RF gun requires a water based thermal system to tune the resonance frequency of the cavity to 2856.03MHz. The RF system operates in pulsed mode with bursts of 2 - 3 mu sec. duration at a repetition rate of 30 - 120Hz. The thermal system operates in combination with the low-level RF system (LLRF) to set the operation point of the cavity. The LLRF system controls the amplitude and phase of the cavity voltage and defines the necessary slow signals to the thermal system. The thermal system operates by pre-heating / pre-cooling the water and mixing both channels to achieve the temperature to control the cavity resonant frequency. The tune control of the RF gun includes two systems with different dynamics. The dynamics of the thermal system is slow while the RF system is fast. Additionally, different actuators in the system present limits that introduce non-linearities to be taking into account during the start up process. Combining these characteristics, a controller is designed for the resulting hybrid system that allows convergence in large for all the operation conditions and achieve the performance in the magnitude and phase of the cavity voltage required around the operation point. C1 [Rivetta, C.; Akre, R.; Cutino, P.; Frisch, J.; Kotturi, K.] SLAC, Menlo Pk, CA USA. RP Rivetta, C (reprint author), SLAC, Menlo Pk, CA USA. EM rivetta@slac.stanford.edu NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1142 EP 1144 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301115 ER PT B AU Mastorides, T Rivetta, C Fox, JD Teytelman, D Van Winkle, D AF Mastorides, T. Rivetta, C. Fox, J. D. Teytelman, D. Van Winkle, D. GP IEEE TI Analysis of the longitudinal low-order mode beam dynamics in PEP-II rings at high current beams SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB PEP-II plans to achieve the final goal in luminosity will require an increase of the beam currents to 4A for LER and 2.2A for HER. These magnitudes are challenging in part because they will push the longitudinal low-order mode (LOM) beam stability and the station stability to the limit. To analyze the behavior of both rings at high currents and to understand the limits in the longitudinal feedback systems, a simulation tool has been developed at SLAC. This tool is based on a reduced model of the longitudinal LOM dynamics of the beam interacting with the effective impedance presented by the RF stations. Simulations and measurements of the longitudinal beam behavior in both rings have been performed to understand the ultimate limits of the systems. These studies have defined the impact of control loop parameters in the longitudinal beam dynamics, identified the limiting behavior of RF devices affecting the optimal performance of the RF stations and quantified the behavior of the longitudinal LOM beam dynamics. Results of sensitivity to parameter variations in the beam dynamics and limits in the maximum current that LER/HER can achieve based on the longitudinal beam stability are reported in this paper. C1 [Mastorides, T.; Rivetta, C.; Fox, J. D.; Teytelman, D.; Van Winkle, D.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Mastorides, T (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM themis@slac.stanford.edu; rivetta@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1145 EP 1147 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301116 ER PT B AU Spencer, JE AF Spencer, J. E. GP IEEE TI Radioactivity and damage studies for next generation colliders SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Optimization of the average, generalized luminosity per unit cost of a linear collider requires a detailed study of this Figure-of-Merit. We consider what might be called a triangle inequality between damage, efficiency and cost. Examples over the length of an LC, starting at the source and ending at the dump, suggest that both costs (capital and operating) and environmental issues can be improved in a compatible way. Thus, a RoHS by any other name (WEES or OSHA) need not present thorny problems requiring unexpected R&D but a push to leverage the most recent advances in materials and technology. Further, the true amortized cost may be seriously underestimated by ignoring such issues. As example, the entire, interior surface of a laser driven RF gun involves materials science where the space requires continuous UHV to sustain stable, acceptable quantum efficiency as well as avoid RF breakdown damage in an environment that is also subject to radiation damage. All of these can seriously reduce the gun's output and an LC's luminosity. Dealing with them provides opportunities to innovate that can justify the costs. C1 SLAC, Menlo Pk, CA 94025 USA. RP Spencer, JE (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM jus@slac.stanford.edu NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1148 EP 1150 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301117 ER PT B AU Anderson, S Spencer, J Wolf, Z Gallagher, G Pellett, D Boussoufi, M AF Anderson, S. Spencer, J. Wolf, Z. Gallagher, G. Pellett, D. Boussoufi, M. GP IEEE TI Fast neutron radioactivity and damage studies on materials SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Many materials and electronics need to be tested for the radiation environment expected at linear colliders (LCs) to improve reliability and longevity since both accelerator and detectors will be subjected to large fluences of hadrons, leptons and gammas. Examples include NdFeB magnets, considered for the damping rings, injection and extraction lines and final focus; electronic, electro- and fiber-optics to be utilized in detector readout, accelerator controls and the CCDs required for the vertex detector; as wen as high and low temperature superconducting materials (LTSMs) for cavities and some magnets. Our first measurements of fast neutron, stepped doses at the UC Davis McClellan Nuclear Reactor Center (UCD MNRC) were for NdFeB materials at EPAC04[1]. We have extended the doses, included more manufacturer's samples and measured radioactivities. We also added L and HTSMs and various semiconductor and electro-optic materials such as photonic band-gap (PBG) fiber that we studied previously with gamma rays. C1 [Anderson, S.; Spencer, J.; Wolf, Z.] SLAC, Menlo Pk, CA 94025 USA. [Gallagher, G.; Pellett, D.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. [Boussoufi, M.] UCD MNRC, McClellan, CA 95652 USA. RP Anderson, S (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM jus@SLAC.stanford.edu FU U.S. Dept. of Energy [DE-AC02-76SF00515, DE-AC02-76CH03000, LCRD DE-FG02-03ER41280] FX We thank members of SLACs OHP Group for the handling and transport of the materials and the staff of MNRC for the irradiation work. Support was under U.S. Dept. of Energy contracts DE-AC02-76SF00515, DE-AC02-76CH03000 and LCRD DE-FG02-03ER41280. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1151 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301118 ER PT B AU Teytelman, D Fox, J Cheng, W Flanagan, J Naito, T Tobiyama, M Drago, A AF Teytelman, D. Fox, J. Cheng, W. Flanagan, J. Naito, T. Tobiyama, M. Drago, A. GP IEEE TI Control and measurements of longitudinal coupled-bunch instabilities in the ATF damping ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Damping ring at the Accelerator Test Facility (ATF) is a storage ring with 714 MHz RF frequency and harmonic number of 330. The ring is used in both single and multi-bunch regimes. In both cases, significant longitudinal dipole motion has been observed in the ring. A prototype longitudinal feedback channel using a Gproto baseband processing channel and a set of horizontal striplines has been constructed for the machine. The prototype allowed both suppression of the longitudinal motion and studies of the motion sources. In this paper, we present the results of these studies including measurements of steady-state oscillation amplitudes, eigenmodal patterns, and growth and damping rates. Using measured growth rates we estimate the driving impedances. We also present the effect of the longitudinal stabilization on the energy spread of the extracted beam as documented by a screen monitor. C1 [Teytelman, D.; Fox, J.] SLAC, Menlo Pk, CA 94025 USA. [Cheng, W.; Flanagan, J.; Naito, T.; Tobiyama, M.] KEK, Tsukuba, Ibaraki, Japan. [Drago, A.] Ist Nazl Fis Nucl, LNF, Frascati, Italy. RP Teytelman, D (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM dim@slac.stanford.edu FU U.S. Department of Energy [DE-AC02-76SF00515]; US-Japan FX Work supported by U.S. Department of Energy contract DE-AC02-76SF00515 and by the US-Japan collaboration in High Energy Physics NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1154 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301119 ER PT B AU Yeddulla, M Tantawi, S AF Yeddulla, Muralidhar Tantawi, Sami GP IEEE TI Analysis of a compact circular TE(0,1) - rectangular TE(0,2) waveguide mode converter SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An analysis method for a three section mode transformer that converts a TE(0,1) circular waveguide mode to a TE(0,2) rectangular waveguide mode will be presented. Experimental results for this taper were earlier published in [1]. ne middle section is a cylinder with a wall radius defined by r(wall) = a(1 + epsilon cos(2 theta)), where a is the radius of the circular guide and E is a design parameter. This cylinder is connected on either side to a circular waveguide and a rectangular waveguide section respectively, through tapered waveguide sections. In this analysis we used a perturbation technique where the rectangular waveguide section's wall radius is treated as a Fourier series expansion with a, the fundamental radius and E the perturbation parameter. By applying the proper boundary conditions we optimize the taper dimensions to minimize conversion into spurious modes. C1 [Yeddulla, Muralidhar; Tantawi, Sami] SLAC, Menlo Pk, CA 94025 USA. RP Yeddulla, M (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM yeddulla@SLAC.stanford.edu NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1157 EP 1159 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301120 ER PT B AU de Lira, A Bellomo, P Luchini, K MacNair, D AF de Lira, A. Bellomo, P. Luchini, K. MacNair, D. GP IEEE TI The dc-magnet power supplies for the LCLS injector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The injector section of the LCLS machine at SLAC [1] requires 100+ dc-magnet power supply systems for operation. Intermediate rack-mounted power supplies provide dipole, quadrupole and solenoid magnet power up to 20 kW at 375 A. A SLAC-developed Ethernet power supply controller interfaces to these commercially available power supplies. Smaller bipolar units rated 6A, 12A, and 30A provide power for small magnets such as correctors, dipoles, and quadrupoles. DACs and ADCs housed in VME crates control these power supplies. For all systems, stability requirements are better than 1000 ppm and EPICS is the controls interface. This paper describes the main hardware characteristics of the power supply systems. C1 [de Lira, A.; Bellomo, P.; Luchini, K.; MacNair, D.] SLAC, Menlo Pk, CA 94025 USA. RP de Lira, A (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM delira@slac.stanford.edu NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1160 EP 1162 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301121 ER PT B AU Biallas, GH Belcher, N Douglas, D Hiatt, T Jordan, K AF Biallas, George H. Belcher, Nathan Douglas, David Hiatt, Tommy Jordan, Kevin GP IEEE TI Combined Panofsky Quadrupoles & corrector dipole SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Two styles of Panofsky Quadrupoles with integral corrector dipole windings are in use in the electron beam line of the Free Electron Laser at Jefferson Lab. We combined steering and focusing functions into single magnets, adding hundreds of Gauss-cm dipole corrector capability to existing quadrupoles because space is at a premium along the beam line. Superposing a one part in 100 dipole corrector field on a 1 part in 1000, weak (600 to 1000 Gauss) quadrupole is possible because the parallel slab iron yoke of the Panofsky Quadrupole acts as a window frame style dipole yoke. The dipole field is formed when two electrically floating "current sources", designed and made at JLab, add and subtract cur-rent from the two opposite quadrupole current sheet windings parallel to the dipole field direction. The current sources also drive auxiliary coils at the yoke's inner corners that improve the dipole field. Magnet measurements yielded the control system field maps that characterize the two types of fields. Field analysis using TOSCA, construction and wiring details, magnet measurements and reference for the current source are presented. C1 [Biallas, George H.; Belcher, Nathan; Douglas, David; Hiatt, Tommy; Jordan, Kevin] Jefferson Lab, Newport News, VA USA. RP Biallas, GH (reprint author), Jefferson Lab, Newport News, VA USA. EM biallas@ilab.org NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1172 EP 1174 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301125 ER PT B AU Cheng, G Daly, EF Rimmer, RA Stirbet, M Vogel, L Wang, H Wilson, KM AF Cheng, G. Daly, E. F. Rimmer, R. A. Stirbet, M. Vogel, L. Wang, H. Wilson, K. M. GP IEEE TI RF-thermal-structural analysis of a waveguide higher order mode absorber SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB For an Ongoing high current cryomodule project, a total Of 5 higher Order mode (HOM) absorbers are required per cavity. The load is designed to absorb Radio Frequency (RF) heat induced by HoMs in a 748.5MHz cavity. Each load is targeted at a 4 kW dissipation capability. Water cooling is employed to remove the heat generated in ceramic tiles and by surface losses on the waveguide walls. A sequentially coupled RF-thermal-structural analysis was developed in ANSYS to optimize the HOM load design. Frequency-dependent dielectric material properties measured from samples and RF power spectrum calculated by the beam-cavity interaction codes were considered. The coupled field analysis capability of ANSYS avoided mapping of results between separate RF and thermal/structural simulation codes. For verification purposes, RF results obtained from ANSYS were compared to those from MAFIA, HFSS, and Microwave Studio. Good agreement was reached and this confirms that multiple-field coupled analysis is a desirable choice in analysis of HOM loads. Similar analysis could be performed on other particle accelerator components where distributed RF heating and surface current induced losses are inevitable. C1 [Cheng, G.; Daly, E. F.; Rimmer, R. A.; Stirbet, M.; Vogel, L.; Wang, H.; Wilson, K. M.] Jefferson Lab, Newport News, VA USA. RP Cheng, G (reprint author), Jefferson Lab, Newport News, VA USA. EM cheng@jlab.org NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1175 EP 1177 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301126 ER PT B AU Ma, HJ Kasemir, K Champion, M Crofford, M Hardek, T Piller, M Zhang, Y AF Ma, Hengjie Kasemir, K. Champion, M. Crofford, M. Hardek, T. Piller, M. Zhang, Y. GP IEEE TI Digital rf control for Spallation Neutron Source accumulator ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The proposed upgrade plan for the rf control of the Spallation Neutron Source (SNS) accumulator ring requires that the new digital field control module (FCM) have the capability of adaptive feed forward (AFF) compensation for the heavy beam loading in the cavities. The feed forward compensation capability should support both the conventional software driven AFF algorithm and a new beam current driven AFF algorithm. A user-friendly Epics GUI for all the FCM functionalities is also a part of the requirement. The first prototype for test has been built. It is a narrowband system based on the conventional I/Q sampling scheme. Both the hardware and software are currently under test in the lab, and the field test in a near future has been planned. C1 [Ma, Hengjie; Kasemir, K.; Champion, M.; Crofford, M.; Hardek, T.; Piller, M.; Zhang, Y.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ma, HJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1181 EP 1183 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301128 ER PT B AU McCarthy, M Anderson, D Campisi, I Casagrande, F Cutler, R Dodson, G Kasemir, K Kim, S Gurd, D Galambos, J Kang, Y Ma, H Riemer, B Schubert, J Stockli, M AF McCarthy, M. Anderson, D. Campisi, I. Casagrande, F. Cutler, R. Dodson, G. Kasemir, K. Kim, S. Gurd, D. Galambos, J. Kang, Y. Ma, H. Riemer, B. Schubert, J. Stockli, M. GP IEEE TI Spallation neutron source (SNS) high pulse repetition rate considerations SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Increasing the pulse repetition rate (PRR) of the SNS Linac to its designed maximum of 60 Hz to provide 1.4 NW of beam on target is in progress. Operation above 60 Hz to provide beam to a second target is also being considered in the future. Increasing the PRR to 80 Hz would allow the additional pulses to be diverted to a second target. This paper discusses the impact of increasing the PRR on the SNS infrastructure including Radio Frequency (RF) systems and structures, the ion source, cryogenics, controls and the target. C1 [McCarthy, M.; Anderson, D.; Campisi, I.; Casagrande, F.; Cutler, R.; Dodson, G.; Kasemir, K.; Kim, S.; Gurd, D.; Galambos, J.; Kang, Y.; Ma, H.; Riemer, B.; Schubert, J.; Stockli, M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP McCarthy, M (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1184 EP 1186 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301129 ER PT B AU Polisetti, AK Assadi, S Deibele, C Patterson, J McCrady, RC Schulte, MJ AF Polisetti, Anil Kumar Assadi, Saeed Deibele, Craig Patterson, Jeffrey McCrady, Rodney C. Schulte, Michael Joseph GP IEEE TI A digital ring transverse feedback low-level RF control system SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A digital wide-band system for damping ring instabilities in an accelerator is presented. With increased beam intensity, the losses of an accumulator ring tend to increase due to the onset of various instabilities in the beam. An analog feedback damper system has been implemented at Los Alamos National Laboratory. This analog system, while functional, has certain limitations and a lack of programmability, which can be overcome by a digital solution. A digital feedback damper system is being designed through a collaborative effort by researchers at Oakridge National Laboratory, Los Alamos National Laboratory, and the University of Wisconsin. This system, which includes analog-to-digital converters, field programmable gate arrays and digital-to-analog converters can equalize errors inherent to analog systems, such as dispersion due to amplifiers/cables, gain mismatches, and timing adjustments. The digital system features programmable gains and delays, and programmable equalizers that are implemented using digital FIR and comb filters. The flexibility of the digital system allows it to be customized to implement different configurations and extended to address other diagnostic problems. C1 [Polisetti, Anil Kumar; Assadi, Saeed; Deibele, Craig; Patterson, Jeffrey] ORNL, Oak Ridge, TN USA. [McCrady, Rodney C.] LANL, Los Alamos, NM USA. [Schulte, Michael Joseph] Univ Wisconsin, Madison, WI USA. RP Polisetti, AK (reprint author), ORNL, Oak Ridge, TN USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1187 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301130 ER PT B AU Shaw, RW Plum, MA Wilson, LL Feigerle, CS Borden, MJ Spickermann, T Irie, Y Sugai, I Takagi, A AF Shaw, R. W. Plum, M. A. Wilson, L. L. Feigerle, C. S. Borden, M. J. Spickermann, T. Irie, Y. Sugai, I. Takagi, A. GP IEEE TI Spallation neutron source (SNS) diamond stripper foil development SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID THICK AB Diamond stripping foils are under development for the SNS. Freestanding, flat 300 to 500 mu g/cm(2) foils as large as 17 x 25 mm have been prepared. These nano-textured polycrystalline foils are grown by microwave plasma-assisted chemical vapor deposition in a corrugated format to maintain their flatness. They are mechanically supported on a single edge by a residual portion of their silicon growth substrate; fine foil supporting wires are not required for diamond foils. Six foils were mounted on the SNS foil changer in early 2006 and have performed well in commissioning experiments at reduced operating power. A diamond foil was used during a recent experiment where 15 mu C of protons, approximately 64% of the design value, were stored in the ring. A few diamond foils have been tested at LANSCE/PSR, where one foil was in service for a period of five months (820 C of integrated injected charge) before it was replaced. Diamond foils have also been tested in Japan at KEK (640 keV F) where their lifetimes slightly surpassed those of evaporated carbon foils, but fell short of those for Sugai's new hybrid boron carbon (HBC) foils. [1]. C1 [Shaw, R. W.; Plum, M. A.; Wilson, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Feigerle, C. S.] Univ Tennessee, Knoxville, TN 37996 USA. [Borden, M. J.; Spickermann, T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Irie, Y.; Sugai, I.; Takagi, A.] KEK, Tsukuba, Ibaraki 3050801, Japan. RP Shaw, RW (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Wilson, Leslie/N-1295-2016 OI Wilson, Leslie/0000-0001-7103-6092 FU U.S. DOE [DE-AC05-00OR22725]; DOE [W-7405-ENG-36 (LANL)]; Japan SPS [18540303 (KEK)] FX SNS is managed by UT-Battelle, LLC, for the U.S. DOE under contract DE-AC05-00OR22725. DOE contract W-7405-ENG-36 (LANL) and Japan SPS contract 18540303 (KEK) supported work at those institutions. The authors thank our LANL, RIKEN, and KEK colleagues for their gracious participation NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1190 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301131 ER PT B AU Stout, D Assadi, S Campisi, I Casagrande, F Crofford, M Devan, R Geng, X Hardek, T Henderson, S Howell, M Kang, Y Stone, W Strong, W Williams, D Wright, P AF Stout, D. Assadi, S. Campisi, I. Casagrande, F. Crofford, M. Devan, R. Geng, X. Hardek, T. Henderson, S. Howell, M. Kang, Y. Stone, W. Strong, W. Williams, D. Wright, P. GP IEEE TI Status of the Spallation Neutron Source superconducting RF facilitiles SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Spallation Neutron Source (SNS) project was completed with only limited superconducting RF (SRF) facilities installed as part of the project. A concerted effort has been initiated to install the infrastructure and equipment necessary to maintain and repair the superconducting Linac, and to support power upgrade research and development (R&D). Installation of a Class10/100/10,000 cleanroom and outfitting of the test cave with RF, vacuum, controls, personnel protection and cryogenics systems is underway. A horizontal cryostat, which can house a helium vessel/cavity and fundamental power coupler for full power, pulsed testing, is being procured. Equipment for cryomodule assembly and disassembly is being procured. This effort, while derived from the experience of the SRF community, Will provide a unique high power test capability as well as long term maintenance capabilities. This paper presents the current status and the future plans for the SNS SRF facilities. C1 [Stout, D.; Assadi, S.; Campisi, I.; Casagrande, F.; Crofford, M.; Devan, R.; Geng, X.; Hardek, T.; Henderson, S.; Howell, M.; Kang, Y.; Stone, W.; Strong, W.; Williams, D.; Wright, P.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Stout, D (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM danstout@sns.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1193 EP 1195 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301132 ER PT B AU Wang, JG AF Wang, J. G. GP IEEE TI Sns ring extraction septum magnet and its interiference with adjacent quadrupole SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB 3D computing simulations have been performed to study magnetic field distributions of the SNS ring extraction Larnbertson septum magnet. The magnetic field for extracted beams is fully characterized in all the aspects. The stray field on the circulating beam line and the effect of a shielding box upstream and a shielding cap downstream is investigated. In addition, the magnetic interference between the Lambertson and an adjacent quadrupole has been studied. The simulations have provided valuable information for the SNS ring commissioning and operation. This paper reports our simulation techniques and the major results. C1 Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA. RP Wang, JG (reprint author), Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA. EM jgwang@ornl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1196 EP 1198 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301133 ER PT B AU Bruno, D Ganetis, G Louie, W Sandberg, J AF Bruno, D. Ganetis, G. Louie, W. Sandberg, J. GP IEEE TI Overview of the ags cold snake power supplies and the new rhic sextupole power supplies SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The two rings in the Relativistic Heavy Ion Collider (RHIC) were originally constructed with 24 sextupole power supplies, 12 for each ring. Before the start of Run 7, 24 new sextupole power supplies were installed, 12 for each ring. Individual sextupole power supplies are now each connected to six sextupole magnets. A superconducting snake magnet and power supplies were installed in the Alternating Gradient Synchrotron (AGS) and commissioned during RHIC Run 5, and used operationally in RHIC Run 6. The power supply technology, connections, control systems and interfacing with the Quench Protection system for both these systems will be presented. C1 [Bruno, D.; Ganetis, G.; Louie, W.; Sandberg, J.] Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. RP Bruno, D (reprint author), Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. EM bruno@bnl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1207 EP 1209 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301137 ER PT B AU Bruno, D Ganetis, G Heppner, G Louie, W Sandberg, J Schultheiss, C AF Bruno, D. Ganetis, G. Heppner, G. Louie, W. Sandberg, J. Schultheiss, C. GP IEEE TI Rhic power supplies-ifamure statistics for runs 4, 5 and 6 SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The two rings in the Relativistic Heavy Ion Collider (RHIC) require a total of 933 power supplies to supply current to highly inductive superconducting magnets. Failure statistics for the RHIC power supplies will be presented for the last three RHIC runs. The failures of the power supplies will be analyzed. The statistics associated with the power supply failures will be presented. Comparisons of the failure statistics for the last three RHIC runs will be shown. Improvements that have increased power supply availability will be discussed. Further improvements to increase the availability of the power supplies will also be discussed. C1 [Bruno, D.; Ganetis, G.; Heppner, G.; Louie, W.; Sandberg, J.; Schultheiss, C.] Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. RP Bruno, D (reprint author), Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. EM bruno@bnl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1210 EP 1212 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301138 ER PT B AU He, P Anerella, M Aydin, S Ganetis, G Harrison, M Jain, A Parker, B AF He, P. Anerella, M. Aydin, S. Ganetis, G. Harrison, M. Jain, A. Parker, B. GP IEEE TI Vibration measurements to study the effect of cryogen flow in a superconducting quadrupole SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The conceptual design of compact superconducting magnets for the International Linear Collider final focus is presently under development. A primary concern in using superconducting quadrupoles is the potential for inducing additional vibrations from cryogenic operation. We have employed a Laser Doppler Vibrometer system to measure the vibrations in a spare RHIC quadrupole magnet under cryogenic conditions. Some preliminary results of these studies were limited in resolution due to a rather large motion of the laser head as well as the magnet. As a first step towards improving the measurement quality, a new set up was used that reduces the motion of the laser holder. The improved setup is described, and vibration spectra measured at cryogenic temperatures, both with and without helium flow, are presented. C1 [He, P.; Anerella, M.; Aydin, S.; Ganetis, G.; Harrison, M.; Jain, A.; Parker, B.] Brookhaven Natl Lab, Superconducting Magnet Div, Upton, NY 11973 USA. RP He, P (reprint author), Brookhaven Natl Lab, Superconducting Magnet Div, Upton, NY 11973 USA. EM phe@bnl.gov NR 4 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1213 EP 1215 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301139 ER PT B AU Kirk, HG Park, HJ Tsang, T Fabich, A Efthymiopoulos, I Haug, F Lettry, J Palm, M Mokhov, N Striganov, S Carroll, A Graves, VB Spampinato, PT McDonald, KT Bennett, JRJ Cannetta, O Loveridge, P AF Kirk, H. G. Park, H. -J. Tsang, T. Fabich, A. Efthymiopoulos, I. Haug, F. Lettry, J. Palm, M. Mokhov, N. Striganov, S. Carroll, A. Graves, V. B. Spampinato, P. T. McDonald, K. T. Bennett, J. R. J. Cannetta, O. Loveridge, P. GP IEEE TI A high-power target experiment at the cern PS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We test a target concept devised for the purpose of producing copious secondary pions and capturing the muon decay products. This experiment is designed to test the target system for a neutrino factory or muon collider and consists of a free flowing mercury stream embedded in a high-field solenoid. Key components are described. C1 [Kirk, H. G.; Park, H. -J.; Tsang, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Fabich, A.; Efthymiopoulos, I.; Haug, F.; Lettry, J.; Palm, M.] CERN, CH-1211 Geneva 23, Switzerland. [Mokhov, N.; Striganov, S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Carroll, A.; Graves, V. B.; Spampinato, P. T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [McDonald, K. T.] Princeton Univ, Princeton, NJ 08544 USA. [Bennett, J. R. J.; Cannetta, O.; Loveridge, P.] Rutherford Appleton Lab, CCLRC, Didcot OX11 0QX, Oxon, England. RP Kirk, HG (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM hkirk@bnl.gov FU US DOE [DE-AC02-98CH10886] FX This work was supported in part by the US DOE Contract NO. DE-AC02-98CH10886. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1216 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301140 ER PT B AU Liaw, CJ Sikora, R Schroeder, R AF Liaw, C. J. Sikora, R. Schroeder, R. GP IEEE TI Study of the rhic bpm sma connector failure problem SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB About 730 BPMs are mounted on the RHIC CQS and Triplet super-conducting magnets. Semi-rigid coaxial cables are used to bring the electrical signal from the BPM feedthroughs to the outside flanges, at the ambient temperature. Every year around 10 cables will lose their signals during the operation. The connection usually failed at the warm end of the cable. The problems were either the solder joint failed or the center conductor retracted out of the SMA connector. Finite element analyses were performed to understand the failure mechanism of the solder joint. The results showed that (1) The SMA center conductor can separate from the mating connector due to the thermal retraction. (2) The maximum thermal stress at the warm end solder joint can exceed the material strength of the Pb37/Sn63 solder material and (3) The magnet ramping frequency (similar to 10 Hz), during the machine startup, can possibly resonant the coaxial cable and damage the solder joints, especially when a fracture is initiated. Test results confirmed that by using the silver bearing solder material (a higher strength material) and by crimping the cable at the locations close to the SNLk connector (to prevent the center conductor from retracting) can effectively resolve the connector failure problem. C1 [Liaw, C. J.; Sikora, R.; Schroeder, R.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Liaw, CJ (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1219 EP 1221 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301141 ER PT B AU Marneris, I Badea, VS Bonati, R Roser, T Sandberg, J AF Marneris, I. Badea, V. S. Bonati, R. Roser, T. Sandberg, J. GP IEEE TI Simulations of the ags MMPS storing energy in capacitor banks SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Brookhaven AGS Main Magnet Power Supply (MMPS) is a thyristor control supply rated at 5500 Amps, +/-9000 Volts. The peak magnet power is 50 MWatts. The power supply is fed from a motor/generator manufactured by Siemens. The generator is 3 phase 7500 Volts rated at 50 MVA. The peak power requirements come from the stored energy in the rotor of the motor/generator. The motor generator is about 45 years old, made by Siemens and it is not clear if companies will be manufacturing similar machines in the future. We are therefore investigating different ways of storing energy for future AGS MMPS operations. This paper will present simulations of a power supply where energy is stored in capacitor banks. Two dc to dc converters will be presented along with the control system of the power section. The switching elements will be IGCT's made by ABB. The simulation program used is called PSIM version 6.1. The average power from the local power authority into the power supply will be kept constant during the pulsing of the magnets at +1-50 MW. The reactive power will also be kept constant below 1.5 MVAR. Waveforms will be presented. C1 [Marneris, I.; Badea, V. S.; Bonati, R.; Roser, T.; Sandberg, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Marneris, I (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1222 EP 1224 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301142 ER PT B AU Meng, W Jain, A Ganetis, G Kayran, D Litvinenko, VN Longo, C Mahler, G Pozdeyev, E Tuozzolo, J AF Meng, W. Jain, A. Ganetis, G. Kayran, D. Litvinenko, V. N. Longo, C. Mahler, G. Pozdeyev, E. Tuozzolo, J. GP IEEE TI Unique features in magnet designs for R&D energy recovery linac at BNL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we describe the unique features and analysis techniques used on the magnets for a R&D Energy Recovery Linac (ERL) [1] under construction at the Collider Accelerator Department at BNL. The R&D ERL serves as a test-bed for future BNL ERLs, such as an electron-cooler-ERL at RHIC [2] and a future 20 GeV ERL electron-hadron at eRHIC [3]. Here we present select designs of various dipole and quadrupole magnets which are used in Z-bend merging systems [4] and the returning loop, 3-D simulations of the fields in aforementioned magnets, particle tracking analysis, and the magnet's influence on beam parameters. We discuss an unconventional method of setting requirements on the quality of magnetic field and transferring them into measurable parameters as well as into manufacturing tolerances. We compare selected simulation with results of magnetic measurements. C1 [Meng, W.; Jain, A.; Ganetis, G.; Kayran, D.; Litvinenko, V. N.; Longo, C.; Mahler, G.; Pozdeyev, E.; Tuozzolo, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Meng, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM meng@bnl.gov RI Kayran, Dmitry/E-1876-2013 OI Kayran, Dmitry/0000-0002-1156-4384 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1225 EP 1227 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301143 ER PT B AU Niedziela, J Fu, W Harvey, P Marr, G Schoefer, V Satogata, T AF Niedziela, J. Fu, W. Harvey, P. Marr, G. Schoefer, V. Satogata, T. GP IEEE TI Dynamic collaborative documentation at the brookhaven national laboratory collider-accelerator defartment SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Centralization of information pertaining to accelerators can benefit accelerator operation and development. Further, retention and the changeable nature of information present challenges to accelerator operation, particularly in instances of turnover. MediaWiki is free, server-based software licensed under the GNU General Public License that uses P]HP to render data stored in a MySQL database as interactive web documents, and is designed to produce a collaborative document known as a wiki. The MediaWiki engine was implemented at BNL, and this paper describes the first year of use by the Operations, Controls, and RF groups at the Collider-Accelerator Department, including code modifications, common practices, and use as a training tool. C1 [Niedziela, J.; Fu, W.; Harvey, P.; Marr, G.; Schoefer, V.; Satogata, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Niedziela, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM niedziela@bnl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1228 EP 1230 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301144 ER PT B AU Pinayev, I AF Pinayev, I. GP IEEE TI Characterization of the RF system of NSLS x-ray ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The proper intercavity phasing is required for a storage ring with multiple RF cavities to ensure momentum acceptance and lifetime of a stored beam. In this paper we present method for simultaneous measurement of the accelerating voltage and relative phase for individual cavity at operational conditions. Theory and experimental results for NSLS X-ray synchrotron are presented. C1 Brookhaven Natl Lab, NSLS Project 2, Upton, NY 11973 USA. RP Pinayev, I (reprint author), Brookhaven Natl Lab, NSLS Project 2, Upton, NY 11973 USA. EM pinayev@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1231 EP 1233 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301145 ER PT B AU Tsoupas, N Shaftan, T Rose, J Pinayev, I Heese, R Meier, R Stelmach, C AF Tsoupas, N. Shaftan, T. Rose, J. Pinayev, I. Heese, R. Meier, R. Stelmach, C. GP IEEE TI Design of beam transfer lines for the NSLS II SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The NSLS-II light source [1] which is a proposed facility to be built at Brookhaven National Laboratory utilizes two synchrotron accelerator rings: the booster and the Storage ring (SR). Designing the NSLS-II injector we considered two options for the booster layout, where the rings either a) share the same tunnel, but placed at different horizontal planes or b) booster is located in a separate building. The booster which accepts beam from the linac, accelerates the electron beam to an energy of 3.0 GeV and the beam is extracted to the Booster to Storage Ring (BtS) transport line which transports the beam and injects it into the SR ring. The design procedure for each of the two options of the BtS line and other details about the optics and the magnetic elements of the line are presented in this paper. C1 [Tsoupas, N.; Shaftan, T.; Rose, J.; Pinayev, I.; Heese, R.; Meier, R.; Stelmach, C.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Tsoupas, N (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM tsoupas@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1234 EP 1236 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301146 ER PT B AU Pavlishin, I Stolyarov, D Babzien, M Pogorelsky, I Yakimenko, V Zholents, A Zolotorey, M AF Pavlishin, I. Stolyarov, D. Babzien, M. Pogorelsky, I. Yakimenko, V. Zholents, A. Zolotorey, M. GP IEEE TI Optical parametric amplifier test for optical stochastic cooling of RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Optical Stochastic Cooling (OSC) of gold ions in the Relativistic Heavy Ion Collider (RHIC) operating on wavelength similar to 12 mu m has been proposed by Ilan Ben-Zvi and use of Optical Parametric Amplifier (OPA) for OSC was suggested by Max Zolotorev [1, 2]. We have tested the performance of the OPA suggested to be used in OSC for RHIC. Our OPA is based on a single CdGeAs2 crystal that has been pumped by a second harmonic of pulsed CO2 laser system. Particle emission was emulated by output of another hybrid CO2 laser operating in single longitudenal mode regime at wavelength 9.552 mu m. The maximum amplification was achieved at a pump intensity value of 9.2x 10(6) W/cm(2). Further increase of the pump intensity caused amplification quenching which we attribute to nonlinear multiphoton absorption of the pump beam. We also performed interferometric measurements that demonstrate that amplification of the radiation in OPA preserves its coherence. C1 [Pavlishin, I.; Stolyarov, D.; Babzien, M.; Pogorelsky, I.; Yakimenko, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Zholents, A.; Zolotorey, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Pavlishin, I (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. FU Department of Energy [DE-AC02-98CH10886] FX This work was supported by the Department of Energy Contract #DE-AC02-98CH10886. NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1237 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301147 ER PT B AU Zhang, W Marneris, I Sandberg, J AF Zhang, W. Marneris, I. Sandberg, J. GP IEEE TI Large scale distributed parameter model of main magnet system and frequency decomposition analysis SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Large accelerator main magnet system consists of hundreds, even thousands, of dipole magnets. They are linked together under selected configurations to provide highly uniform dipole fields when powered. Distributed capacitance, insulation resistance, coil resistance, magnet inductance, and coupling inductance of upper and lower pancakes make each magnet a complex network. When all dipole magnets are chained together in a circle, they become a coupled pair of very high order complex ladder networks. In this study, a network of more than thousand inductive, capacitive or resistive elements are used to model an actual system. The circuit is a large-scale network. Its equivalent polynomial form has several hundred degrees. Analysis of this high order circuit and simulation of the response of any or all components is often computationally infeasible. We present methods to use frequency decomposition approach to effectively simulate and analyze magnet configuration and power supply topologies. C1 [Zhang, W.; Marneris, I.; Sandberg, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM arling@bnl.gov NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1240 EP 1242 DI 10.1109/BIBE.2007.4375723 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301148 ER PT B AU Zhang, W Marneris, I Sandberg, J AF Zhang, W. Marneris, I. Sandberg, J. GP IEEE TI Analysis and simulation of main magnet transmission line effect SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A main magnet chain forms a pair of transmission lines. Pulse-reflection-caused voltage and current differentiation throughout the magnet chain can have adverse effect on main magnet field quality. This effect is associated with magnet system configuration, coupling efficiency, and parasitic parameters. A better understanding of this phenomenon will help us in new design and existing system upgrade. In this paper, we exam the transmission line effect due to different input functions as well as configuration, coupling, and other parameters. C1 [Zhang, W.; Marneris, I.; Sandberg, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1243 EP 1245 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301149 ER PT B AU Henderson, S AF Henderson, Stuart GP IEEE TI Status of the Spallation Neutron Source: Machine and science SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Spallation Neutron Source accelerator complex consists of a 2.5 MeV H(-) front-end injector system, a 186 MeV normal-conducting linear accelerator, a 1 GeV superconducting linear accelerator, an accumulator ring and associated beam transport lines. Since completion of the construction project in June 2006, attention has focused on ramping up the performance of the SNS accelerator complex to the design parameters, and on neutron scattering instrument commissioning and obtaining early science results. Recent operational history will be presented. C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA. RP Henderson, S (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1252 EP 1256 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301152 ER PT B AU Sullivan, M AF Sullivan, M. GP IEEE TI e(+)e(-) Factories SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The achievements of the three main e+e- Factories have been impressive. The KEK B-Factory has achieved a peak luminosity of 1.7x10(34)cm(-2)sec(-1) and the PEP-II B-Factory has reached 1.2x10(34) cm(-2)sec(-1) while the DAFNE Phi-Factory has obtained 1.5x10(32) cm(-2) sec(-1). Early in the B-Factory running, CP violation in the B meson system was found to be consistent with the prediction of the Standard Model. Now all three factories are integrating as much luminosity as they can in order to look for rare decay channels that may have a rate that differs from the value predicted by the Standard Model and therefore hint at New Physics. There are two newer factories that have started or are about to start. The Tau-charm factory at CESR has been delivering luminosity to the CLEO detector and BEPCII, the newest Tau-charm e(+)e(-) factory located at IHEP in Beijing, has just started commissioning. I will give a status report on the recent accomplishments of all five factories and will show what these facilities have for plans to further improve performance. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Sullivan, M (reprint author), Stanford Linear Accelerator Ctr, POB 20450, Stanford, CA 94309 USA. EM sullivan@slac.stanford.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1257 EP 1261 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301153 ER PT B AU Merminga, L AF Merminga, Lia GP IEEE TI Energy Recovery Linacs SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The success and continuing progress of the three operating FELs based on Energy Recovery Linacs (ERLs), the Jefferson Lab IR FEL Upgrade, the Japan Atomic Energy Agency (JAEA) FEL, and the Novosibirsk High Power THz FEL, have inspired multiple future applications of ERLs, which include higher power FELs, synchrotron radiation sources, electron cooling devices, and high luminosity electron-ion colliders. The benefits of using ERLs for these applications are presented. The key accelerator physics and technology challenges of realizing future ERL designs, and recent developments towards resolving these challenges are reviewed. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Merminga, L (reprint author), Jefferson Lab, Newport News, VA 23606 USA. EM merminga@jlab.org NR 31 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1267 EP 1271 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301155 ER PT B AU Zholents, AA AF Zholents, A. A. GP IEEE TI Generation of subpicosecond x-ray pulses in storage rings SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SYNCHROTRON-RADIATION AB Supicosecond x-ray pulses are routinely produced at ALS, BESSY and SLS with "slicing" technique and used in pump-probe experiments with controlled delay between laser pump pulses and x-ray probe pulses. New development aiming for a production of a subpicosecond x-ray pulses using rf orbit deflection technique is under way at APS. Both techniques will be reviewed here. C1 LBNL, Berkeley, CA 94720 USA. RP Zholents, AA (reprint author), LBNL, Berkeley, CA 94720 USA. NR 26 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1272 EP 1276 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301156 ER PT B AU Sutter, DF Strauss, BP AF Sutter, David F. Strauss, Bruce P. GP IEEE TI Technology transfer - When, why, issues and advantages SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE C1 [Sutter, David F.] Univ Maryland, IREAP, College Pk, MD 20742 USA. [Strauss, Bruce P.] US DOE, OHEP, Washington, DC USA. RP Sutter, DF (reprint author), Univ Maryland, IREAP, College Pk, MD 20742 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1280 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301158 ER PT B AU Peggs, S Satogata, T Flanz, J AF Peggs, S. Satogata, T. Flanz, J. GP IEEE TI A survey of hadron therapy accelerator technologies SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID LLUMC PROTON ACCELERATOR; BEAM-OPTICS; CANCER-THERAPY; PERFORMANCE; NB3SN; SYNCHROTRONS; DESIGN; GANTRY; FIELD; LINE AB Hadron therapy has entered a new age [1]. The number of facilities grows steadily, and "consumer" interest is high. Some groups are working on new accelerator technology, while others optimize existing designs by reducing capital and operating costs, and improving performance. This paper surveys the current requirements and directions in accelerator technology for hadron therapy. C1 [Peggs, S.; Satogata, T.] BNL, Upton, NY USA. [Flanz, J.] Harvard Univ, Sch Med, Burr Proton Therapy Ctr, Cambridge, MA 02138 USA. RP Peggs, S (reprint author), BNL, Upton, NY USA. NR 101 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1285 EP + PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301159 ER PT B AU Schoenberg, K AF Schoenberg, K. GP IEEE TI The LANSCE accelerator: A powerful tool for science and applications SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Los Alamos Neutron Science Center (LANSCE) accelerator was built over 30 years ago. It consists of a 800-MeV proton linac, a proton storage ring, and facilities for isotope production, proton radiography, ultra-cold neutrons, weapons neutron research and for various sciences such as materials, biological and nanotechnology using neutron scattering. For national security, it plays a vital role in stockpile stewardship by providing important data on dynamic events during weapons detonation using proton radiography. ne aging components of LANSCE will be refurbished and modernized in the next few years and the LANSCE will continue serving as a prominent facility for both science and national security in the years ahead. After SNS comes on line, it will play a complementary role and will also serve as a staging facility for some experiments to be carried out at SNS. Interesting science being conducted at LANSCE and the plans for the refurbishment and future enhancement of the facility will be presented. C1 LANL, Los Alamos, NM USA. RP Schoenberg, K (reprint author), LANL, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1290 EP 1290 PG 1 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301160 ER PT B AU Wienands, U Cai, Y Ecklund, SD Seeman, JT Sullivan, MK AF Wienands, U. Cai, Y. Ecklund, S. D. Seeman, J. T. Sullivan, M. K. GP IEEE TI PEP-II at 1.2 x 10(34)/cm(2)/s luminosity SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB PEP-II is an asymmetric e(+)-e(-) collider operating at the Gamma(4S) energy and has recently set several performance records. The luminosity has reached a peak of 1.2 x 10(34)/cm(2)/s. Operating in continuous injection mode for both beams PEP-II has delivered up to 0.91/fb/day. Peak currents have reached 3.0 A of positrons and 1.9 A of electrons in 1732 bunches. Total delivered luminosity since turn-on in 1999 has exceeded 450/fb. This paper reviews the present performance issues of PEP-II and also the planned increase of luminosity in the near future to 2 x 10(34)/cm(2)/s. C1 [Wienands, U.; Cai, Y.; Ecklund, S. D.; Seeman, J. T.; Sullivan, M. K.] SLAC, PEP Team 2, Stanford, CA USA. RP Wienands, U (reprint author), SLAC, PEP Team 2, Stanford, CA USA. EM uli@slac.stanford.edu FU US DOE [DE-AC03-76SF00515] FX Supported by US DOE under Contract DE-AC03-76SF00515 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1301 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301163 ER PT B AU Neil, GR AF Neil, George R. GP IEEE TI Applications for energy recovering Free Electron Lasers SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID DEPOSITION; LINAC AB The availability of high-power, high-brilliance sources of tunable photons from energy-recovered Free Electron Lasers is opening up whole new fields of application of accelerators in industry. This will review some of the ideas that are already being put into production, and some of the newer ideas that are still under development. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Neil, GR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1329 EP 1333 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301169 ER PT B AU Cardman, LS Harwood, L AF Cardman, Lawrence S. Harwood, Leigh GP IEEE TI The JLab 12 GeV energy upgrade of CEBAF for QCD and hadronic physics SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB CEBAF at Jefferson Lab is a 5-pass, recirculating cw electron linac operating at similar to 6 GeV and devoted to basic research in nuclear physics. The 12 GeV Upgrade is a major project, sponsored by the DOE Office of Nuclear Physics, that will expand its research capabilities substantially by doubling the maximum energy and adding major new experimental apparatus. We anticipate that the project will receive Critical Decision 2 approval this year and begin construction in 2008. The research program motivating the Upgrade includes: the study of hybrid mesons, which involve excited states of the glue, to explore the nature of quark confinement; dramatic improvements in our understanding of the QCD structure of the hadrons through the extension of our knowledge of their parton distribution functions to high x(Bjorken), where they are dominated by underlying valence quark structure, and a program of nucleon "tomography" via measurements of the Generalized Parton Distributions (GPDs), a broad program of experiments in the physics of nuclei that aims to understand the QCD basis for the nucleon-nucleon force and how nucleons and mesons arise as an approximation to the underlying quark-gluon structure; and precision tests of the Standard Model through parity violating deep inelastic and Moller scattering. The Upgrade includes: doubling the accelerating voltages of the linacs by adding 10 new high-performance cryomodules; the requisite expansion of the 2K cryogenics plant and rf power systems to support these cryomodules; upgrading the beam transport system from 6 to 12 GeV through extensive re-use and/or modification of existing hardware; and the addition of one recirculation arc, a new experimental area, and the beamline to it; and the construction of major new experimental equipment for the GPD, high-x(Bjorkon), and hybrid meson program. The presentation will describe the science briefly and provide some details about the accelerator plans. C1 [Cardman, Lawrence S.; Harwood, Leigh] Thomas Jefferson Natl Accelerator Facil, JLab GeV Project Team 12, Newport News, VA 23606 USA. RP Cardman, LS (reprint author), Thomas Jefferson Natl Accelerator Facil, JLab GeV Project Team 12, Newport News, VA 23606 USA. EM harwood@jlab.org NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1344 EP 1348 PG 5 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301172 ER PT B AU Mishra, CS AF Mishra, C. S. GP IEEE TI Progress in cryomodules & cavities in India SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Mishra, CS (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1362 EP 1362 PG 1 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301178 ER PT B AU Mishra, CS AF Mishra, C. S. GP IEEE TI The importance of forums to the ILC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Mishra, CS (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1387 EP 1387 PG 1 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301190 ER PT B AU Feschenko, AV Kravchuk, LV Menshov, AA Aleksandrov, AV Assadi, S Galambos, J Henderson, S AF Feschenko, A. V. Kravchuk, L. V. Menshov, A. A. Aleksandrov, Alexander V. Assadi, Saeed Galambos, John Henderson, Stuart GP IEEE TI Longitudinal beam parameters study in the SNS LINAC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB SNS Linac utilizes several accelerating structures operating at two frequencies. CCL and SCL operate at 805 MHz while 402.5 MHz is used for RFQ and DTL. Beam transfer from the previous part of the accelerator to the subsequent one requires careful longitudinal matching to improve beam transmission and to minimize e beam losses. Longitudinal beam parameters have been investigated with the help of three Bunch Shape Monitors installed in the inter-segments of the first CCL Module. The results of bunch shape observations for different accelerator settings are presented. Longitudinal beam emittance has been measured and optimized. Longitudinal beam halo has been evaluated as well. C1 [Feschenko, A. V.; Kravchuk, L. V.; Menshov, A. A.] INR, Moscow, Russia. [Aleksandrov, Alexander V.; Assadi, Saeed; Galambos, John; Henderson, Stuart] ORNL, Oak Ridge, TN USA. RP Feschenko, AV (reprint author), INR, Moscow, Russia. FU [DE-AC05-00OR22725] FX *SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1388 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301191 ER PT B AU Scarpine, VE Tassotto, GR Lumpkin, AH AF Scarpine, V. E. Tassotto, G. R. Lumpkin, A. H. GP IEEE TI OTR imaging of intense 120 GEV protons in the NuMI beamline at fnal SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID OPTICAL-TRANSITION RADIATION AB An Optical Transition Radiation (OTR) detector has been installed in the Fermilab NuMI proton beamline, which operates at beam powers of up to similar to 350 W, to obtain real-time, spill-by-spill beam profiles for neutrino production. As part of the Run H collider plan and the NuMI neutrino program, a series of OTR detectors were designed, constructed and installed in various beandines at Fermilab. NuMI OTR images of 120 GeV protons for beam intensities up to 4.1x10(13) at a spill rate of 0.5 Rz and small transverse beam size of similar to 1 mm (sigma) are presented here. Beam profiles are extracted from the OTR images and compared with an adjacent secondary-electron emission (SEM) monitor. The OTR detector provides two-dimensional beam shape, such as ellipticity and tilt, as well as beam centroid and beam intensity information. In addition, the response of the OTR detector over time is examined to look for signs of foil aging. C1 [Scarpine, V. E.; Tassotto, G. R.] FNAL, Batavia, IL 60542 USA. [Lumpkin, A. H.] Argonne Natl Lab, APS, Argonne, IL 60439 USA. RP Scarpine, VE (reprint author), FNAL, Batavia, IL 60542 USA. EM scarpine@fnal.gov; tassotto@final.gov; lumpkin@aps.anl.gov FU U. S. Department of Energy [DE-AC02-CH03000]; U. S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Work supported by U. S. Department of Energy under Contract No. DE-AC02-CH03000 and by the U. S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1397 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301194 ER PT B AU Molloy, S Frisch, J May, J McCormick, D Smith, T Baboi, N Hensler, O Petrosyan, L Eddy, N Piccoli, L Rechenmacher, R Ross, M Wendt, M Napoly, O Paparella, RC Simon, C AF Molloy, S. Frisch, J. May, J. McCormick, D. Smith, T. Baboi, N. Hensler, O. Petrosyan, L. Eddy, N. Piccoli, L. Rechenmacher, R. Ross, M. Wendt, M. Napoly, Olivier Paparella, Rita C. Simon, Claire GP IEEE TI Measurement of the beam's trajectory using the higher order modes it generates in a superconducting accelerating cavity SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB It is well known that an electron beam excites Higher Order Modes (HOMs) as it passes through an accelerating cavity [1]. The properties of the excited signal depend not only on the cavity geometry, but on the charge and trajectory of the beam. It is, therefore, possible to use these Signals as a monitor of the beam's position. Electronics were installed on all forty cavities present in the FLASH [2] linac in DESY. These electronics filter out a mode known to have a strong dependence on the beam's position, and mix this down to a frequency suitable for digitisation. An analysis technique based on Singular Value Decomposition (SVD) was developed to calculate the beam's trajectory from the output of the electronics. The entire system has been integrated into the FLASH control system. C1 [Molloy, S.; Frisch, J.; May, J.; McCormick, D.; Smith, T.] SLAC, Menlo Pk, CA USA. [Baboi, N.; Hensler, O.; Petrosyan, L.] DESY, Hamburg, Germany. [Eddy, N.; Piccoli, L.; Rechenmacher, R.; Ross, M.; Wendt, M.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Napoly, Olivier; Paparella, Rita C.; Simon, Claire] CEA, Gif Sur Yvette, France. RP Molloy, S (reprint author), SLAC, Menlo Pk, CA USA. EM smolloy@slac.stanford.edu FU US Department of Energy [DE-AC0276SF00515]; European Community FP6 "Structuring the European Research Area" programme [RII3-CT- 2003-506395] FX Work supported by US Department of Energy Contract DE-AC0276SF00515, and by the European Community FP6 Structuring the European Research Area programme (CARE, contract number RII3-CT- 2003-506395) NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1400 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301195 ER PT B AU Holloway, MA Fiorito, RB O'Shea, PG Shkvarunets, AG Benson, SV Brock, W Coleman, JL Douglas, D Evans, R Evtushenko, P Jordan, K Sexton, D AF Holloway, M. A. Fiorito, R. B. O'Shea, P. G. Shkvarunets, A. G. Benson, S. V. Brock, W. Coleman, J. L. Douglas, D. Evans, R. Evtushenko, P. Jordan, K. Sexton, D. GP IEEE TI Rms emittance measurements using Optical Transition Radiation Interferometry at the Jefferson Lab FEL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Optical Transition Radiation Interferometry (OTRI) has proven to be effective tool for measuring rms beam divergence. We present rms, emittance measurement results of the 115 MeV energy recovery linac at the Thomas Jefferson National Laboratory's Free Electron Laser using OTRI. OTR data from both near field beam images and far field angular distribution images give evidence of two spatial and angular distributions within the beam. Using the unique features of OTRI we segregate the two distributions of the beam and estimate separate rms emittance values for each component. C1 [Holloway, M. A.; Fiorito, R. B.; O'Shea, P. G.; Shkvarunets, A. G.] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA. [Benson, S. V.; Brock, W.; Coleman, J. L.; Douglas, D.; Evans, R.; Evtushenko, P.; Jordan, K.; Sexton, D.] Jefferson Lab, Newport News, VA 23606 USA. RP Holloway, MA (reprint author), Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA. EM mholl@umd.edu FU ONR; JTO FX Work supported by the ONR and the JTO NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1403 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301196 ER PT B AU Schulze, M Abeyta, EO Aragon, P Archuleta, R Barraza, J Dalmas, D Ekdahl, C Esquibel, K Eversole, S Gallegos, R Harrison, J Johnson, J Jacquez, E Marroquin, P McCuistian, BT Mitchell, R Montoya, N Nath, S Rowton, L Scarpetti, R Schauer, M Anaya, R Caporaso, G Chambers, F Chen, YJ Falabella, S Guethlein, G McCarrick, J Raymond, B Richardson, R Watson, J Weir, J Bender, H Broste, W Carlson, C Frayer, D Johnson, D Tipton, A Tom, CY Genoni, TC Hughes, TP Thoma, C AF Schulze, Martin Abeyta, E. O. Aragon, P. Archuleta, R. Barraza, J. Dalmas, D. Ekdahl, C. Esquibel, K. Eversole, S. Gallegos, R. Harrison, J. Johnson, J. Jacquez, E. Marroquin, P. McCuistian, B. Trent Mitchell, R. Montoya, N. Nath, S. Rowton, L. Scarpetti, R. Schauer, M. Anaya, R. Caporaso, G. Chambers, F. Chen, Y. J. Falabella, S. Guethlein, G. McCarrick, J. Raymond, B. Richardson, R. Watson, J. Weir, J. Bender, H. Broste, W. Carlson, C. Frayer, D. Johnson, D. Tipton, A. Tom, C. Y. Genoni, T. C. Hughes, T. P. Thoma, C. GP IEEE TI Commissioning the DARHT-II scaled accelerator downstream transport SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The DARHT-II accelerator [1] will produce a 2-kA, 17-MeV beam in a 1600-ns pulse when completed this summer. After exiting the accelerator, the pulse is sliced into four short pulses by a kicker and quadrupole septum and then transported for several meters to a tantalum target for conversion to x-rays for radiography. We describe tests of the kicker, septum, transport, and multi-pulse converter target using a short accelerator assembled from the first available refurbished cells. This scaled accelerator was operated at similar to 8 MeV and similar to 1 kA, providing a beam with approximately the same v/gamma as the final 18-MeV, 2-kA beam, and therefore the same beam dynamics in the downstream transport. The results of beam measurements made during the commissioning of this scaled accelerator downstream transport are described. C1 [Schulze, Martin] SAIC, Los Alamos, NM 87544 USA. [Abeyta, E. O.; Aragon, P.; Archuleta, R.; Barraza, J.; Dalmas, D.; Ekdahl, C.; Esquibel, K.; Eversole, S.; Gallegos, R.; Harrison, J.; Johnson, J.; Jacquez, E.; Marroquin, P.; McCuistian, B. Trent; Mitchell, R.; Montoya, N.; Nath, S.; Rowton, L.; Scarpetti, R.; Schauer, M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Anaya, R.; Caporaso, G.; Chambers, F.; Chen, Y. J.; Falabella, S.; Guethlein, G.; McCarrick, J.; Raymond, B.; Richardson, R.; Watson, J.; Weir, J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Bender, H.; Broste, W.; Carlson, C.; Frayer, D.; Johnson, D.; Tipton, A.; Tom, C. Y.] Univ Calif Los Alamos, Los Alamos, NM 87544 USA. [Genoni, T. C.; Hughes, T. P.; Thoma, C.] Voss Sci, Albuquerque, NM 87108 USA. RP Schulze, M (reprint author), SAIC, Los Alamos, NM 87544 USA. FU USDOE [DE-AC52-06NA25396] FX Work supported by USDOE under contract DE-AC52-06NA25396 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1421 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301202 ER PT B AU Sannibale, F Zolotorev, MS Filippetto, D Stupakov, GV AF Sannibale, F. Zolotorev, M. S. Filippetto, D. Stupakov, G. V. GP IEEE TI Absolute bunch length measurements at the ALS by incoherent synchrotron radiation fluctuation analysis SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB By analysing the pulse to pulse intensity fluctuations of the radiation emitted by a charge particle in the incoherent part of the spectrum, it is possible to extract information about the spatial distribution of the beam. At the Advanced Light Source (ALS) of the Lawrence Berkeley National Laboratory, we have developed and tested a simple scheme based on this principle that allows for the absolute measurement of the bunch length. A description of the method and the experimental results are presented. C1 [Sannibale, F.; Zolotorev, M. S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Filippetto, D.] INFN LNF, Frascati, Italy. [Stupakov, G. V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Sannibale, F (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. FU Director, Office of Science; U.S.Department of Energy [DE-AC02-05CH11231] FX work supported by the Director, Office of Science, of the U.S. Department of Energy under Contract DE-AC02-05CH11231. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1427 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301204 ER PT B AU Kanesue, T Raparia, D Ritter, J Okamiira, M Tamura, J AF Kanesue, Takeshi Raparia, Deepak Ritter, John Okamiira, Masahiro Tamura, Jun GP IEEE TI Design study of the dipole magnet for the RHIC EBIS high energy transport line SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The design studies of the dipole magnet for EBIS HEBT line is proceeding. The RHIC EBIS is a new high current highly charged heavy ion preinjector for RHIC. The dipole magnet discussed in this paper will be used to guide the beam to existing heavy ion injection line to Booster. A total of 145 degrees bend is provided by two identical dipole magnets with a slit between these magnets to pass only intended charge state ions. Also this magnet has a hole in the side wall to pass the beam from the existing Tandem Van de Graaff. The performance of this magnet calculated by TOSCA and the results of the particle tracking calculation are described. C1 [Kanesue, Takeshi] Kyushu Univ, Fukuoka 8190395, Japan. [Raparia, Deepak; Ritter, John; Okamiira, Masahiro] BNL, Upton, NY 11973 USA. [Tamura, Jun] Tokyo Inst Technol, Meguro ku, Tokyo 1528550, Japan. RP Kanesue, T (reprint author), Kyushu Univ, Fukuoka 8190395, Japan. NR 1 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1520 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301235 ER PT B AU Wang, GM Chao, YC Neil, G Evtushenko, P Zhao, K Lu, XY Zhuang, JJ Liu, CY Chen, J AF Wang, Guimei Chao, Yu-Chiu Neil, George Evtushenko, Pavel Zhao, Kui Lu, Xiangyang Zhuang, Jiejia Liu, Chuyu Chen, Jiaer GP IEEE TI STUDY OF GENERIC FRONT-END DESIGNS FOR ERL BASED LIGHT SOURCES SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present work directed at examining the performance of various front end components of an ERL based light source. These include electron source, bunch compression, merger, and accelerating sections, with parameter space dictated by proposed facilities (at FSU and Peking University). These facilities share enough common structural features to make the study applicable to both to a large extent. In this report we will discuss the 6D phase space evolution through the front end based on simulation, with reliable modeling of magnetic and superconducting RF fields. Discussion will be devoted to relative merits of alternative designs, robustness and operational scenarios. C1 [Wang, Guimei; Chao, Yu-Chiu; Neil, George; Evtushenko, Pavel] Jefferson Lab, Newport News, VA USA. [Wang, Guimei; Zhao, Kui; Lu, Xiangyang; Zhuang, Jiejia; Liu, Chuyu; Chen, Jiaer] Peking Univ, Inst Heavy Ion Phys, MOE lab Heavy Ion Phys, Beijing, Peoples R China. RP Wang, GM (reprint author), Jefferson Lab, Newport News, VA USA. EM wangguimei@pku.edu.cn; chao@jlab.org FU National 973 Projects; U.S. DOE [DE-AC05-06OR23177] FX Work supported by National 973 Projects and U.S. DOE Contract No. DE-AC05-06OR23177 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1564 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301250 ER PT B AU Shi, JR Chen, HB Tang, CX Zheng, SX Li, D AF Shi, Jiaru Chen, Huaibi Tang, Chuanxiang Zheng, Shuxin Li, D. GP IEEE TI Experiment on the cold test model of a 2-cell superconducting deflecting cavity for ALS at LBNL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Deflecting cavities are proposed for ALS at LBNL to generate sub-pico-second X-ray pulses. A 2-cell structure has been simulated to achieve required deflecting voltage and damping waveguide is attached on beam pipe to get low impedance. To demonstrate the simulation, we made an aluminum cold test model. Detailed configuration of the experiments measuring the field distribution and Qs with/without waveguide loaded are presented. Calculated (R/Q)s and waveguide damping are compared with simulation. C1 [Shi, Jiaru; Chen, Huaibi; Tang, Chuanxiang; Zheng, Shuxin] Tsinghua Univ, Beijing 100084, Peoples R China. [Li, D.] LBNL, Berkeley, CA 94720 USA. RP Shi, JR (reprint author), Tsinghua Univ, Beijing 100084, Peoples R China. NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1567 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301251 ER PT B AU Barranco, J Berrig, O Gilardoni, S Jeanneret, JB Papaphilippou, Y Robert-Demolaize, G AF Barranco, J. Berrig, O. Gilardoni, S. Jeanneret, J. B. Papaphilippou, Y. Robert-Demolaize, G. GP IEEE TI Beam loss map simulations and measurements in the CERN PS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Numerical tools providing detailed beam loss maps, recently developed for the design of the Large Hadron Collider (LHC) collimation system, were adapted to low energy synchrotrons. Using a MADX optics sequence model, these tools are able to track a large number of particles with SixTrack and interact with a realistic aperture model to simulate particle losses all around the ring. Finally the comparison between the dedicated simulations and measured proton loss pattern at the CERN PS showed good agreement between them. C1 [Barranco, J.; Berrig, O.; Gilardoni, S.; Jeanneret, J. B.; Papaphilippou, Y.] CERN, CH-1211 Geneva 23, Switzerland. [Robert-Demolaize, G.] BNL, Upton, NY USA. RP Barranco, J (reprint author), CERN, CH-1211 Geneva 23, Switzerland. NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1591 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096301259 ER PT B AU Tang, Y Hughes, TP Genoni, TC Ekdahl, CA Schulze, ME AF Tang, Yan Hughes, Thomas P. Genoni, Thomas C. Ekdahl, Carl A. Schulze, Martin E. GP IEEE TI Implementation of spread mass model of ion hose instability in Lamda SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The ion-hose instability sets limits on the allowable vacuum in the DARHT-2 linear induction accelerator (RA, 18.6MeV, 2 mu s). Lamda is a transport code which advances the beam centroid and envelope in a linear induction accelerator from the injector to the final focus region. The code computes the effect of magnet misalignment, beam breakup instability, image-displacement instability, and gap voltage fluctuation. To support the experiments, we have implemented the SM model of ion-hose instability into Lamda. Unlike the ordinary SM ion-hose code which assumes the uniform axial magnetic field, Lamda ion-hose calculation includes varying axial magnetic field, accelerating beam, gas pressure file, varying beam radius, and elliptical beam. This paper describes the Lamda ion-hose instability code, the benchmarks against a semi-analytical SM code, and the particle-in-cell code Lsp. A prediction of ion-hose instability for a 2.5MeV-1.4kA beam in the DARHT-2 is also presented. C1 [Tang, Yan] ATK MR, Albuquerque, NM 87110 USA. [Hughes, Thomas P.; Genoni, Thomas C.] Voss Scientif, Albuquerque, NM 87108 USA. [Ekdahl, Carl A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Schulze, Martin E.] SAIC, San Diego, CA 92121 USA. RP Tang, Y (reprint author), ATK MR, Albuquerque, NM 87110 USA. FU Los Alamos National Laboratory FX Work supported by Los Alamos National Laboratory NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1627 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302011 ER PT B AU Bassi, G Ellison, JA Heinemann, K Warnock, R AF Bassi, G. Ellison, J. A. Heinemann, K. Warnock, R. GP IEEE TI Self consistent Monte Carlo method to study CSR effects in bunch compressors SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE C1 [Bassi, G.] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England. [Ellison, J. A.; Heinemann, K.] UNM, Dept Mat, Albuquerque, NM 87131 USA. [Warnock, R.] SLAC, Menlo Pk, CA 94025 USA. RP Bassi, G (reprint author), Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England. EM g.bassi@dl.ac.uk FU DOE [DE-G02-99ER41104, DE-AC02-76SF00515] FX Work supported by DOE grants DE-G02-99ER41104 and DE-AC02- 76SF00515 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1633 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302013 ER PT B AU Rose, DV Genoni, TC Welch, DR Davidson, RC Startsev, EA AF Rose, D. V. Genoni, T. C. Welch, D. R. Davidson, R. C. Startsev, E. A. GP IEEE TI Two-stream instability analysis for propagating charged particle beams with a velocity tilt SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID PLASMA; ION; ACCELERATION; SIMULATIONS; TRANSPORT; MATTER AB The linear growth and saturation of the two-stream instability for a charged particle beam that is longitudinally compressing as it propagates through a background plasma (due to an applied velocity tilt) has recently been examined. Detailed, 1D particle-in-cell simulations are carried out to examine the growth and saturation of a wavepacket produced by a small amplitude density perturbation in the background plasma. The resultant electrostatic wave spectra that evolves due to the coupling of the primary (resonant) unstable wave packet with the plasma is examined. C1 [Rose, D. V.; Genoni, T. C.; Welch, D. R.] Voss Sci LLC, Albuquerque, NM 87108 USA. [Davidson, R. C.; Startsev, E. A.] Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RP Rose, DV (reprint author), Voss Sci LLC, Albuquerque, NM 87108 USA. EM david.rose@vosssci.com FU U. S. DOE through Princeton Plasma Physics Laboratory FX Research supported by U. S. DOE through Princeton Plasma Physics Laboratory for the Heavy Ion Fusion Science Virtual National Laboratory. NR 22 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1636 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302014 ER PT B AU Welch, DR Rose, DV Sefkow, AB Gilson, EP Henestroza, E Seidl, PA Roy, PK Coleman, JE AF Welch, D. R. Rose, D. V. Sefkow, A. B. Gilson, E. P. Henestroza, E. Seidl, P. A. Roy, P. K. Coleman, J. E. GP IEEE TI End-to-end simulations of an accelerator for heavy ion beam bunching SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Longitudinal bunching factors in excess of 70 of a 300-keV, 27-mA K+ ion beam have been demonstrated in the Neutralized Drift Compression Experiment in rough agreement with particle-in-cell end-to-end simulations. These simulations include the ion source temperature, experimental diode voltage and induction bunching module voltage waveforms in order to determine the initial beam longitudinal phase space critical to longitudinal compression. To maximize simultaneous longitudinal and transverse compression, we designed a solenoidal focusing system that compensated for the impact of the applied velocity tilt on the transverse phase space of the beam. Here, pre-formed plasma provides beam neutralization in the last one meter drift region where the beam perveance becomes large. We compare simulation results with the experimental measurements and discuss the contributions to longitudinal and transverse emittance that limit compression. C1 [Welch, D. R.; Rose, D. V.] Voss Sci, Albuquerque, NM 87108 USA. [Sefkow, A. B.; Gilson, E. P.] PPPL, Princeton, NJ 08543 USA. [Henestroza, E.; Seidl, P. A.; Roy, P. K.; Coleman, J. E.] LBNL, Berkeley, CA 94720 USA. RP Welch, DR (reprint author), Voss Sci, Albuquerque, NM 87108 USA. EM dale.welch@vosssci.com FU DOE through PPPL; HIFS_VNL FX Work supported by DOE through PPPL and the HIFS_VNL. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1639 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302015 ER PT B AU Bandura, L Erdelyi, B Nolen, J AF Bandura, L. Erdelyi, B. Nolen, J. GP IEEE TI Optical effects of energy degraders on the performance of fragment separators SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID PROJECT AB Next-generation facilities for the production of exotic beams require large acceptance fragment separators to separate and transmit rare isotopes. Fragment separators require energy degraders in order to achieve high purity separation of these rare species. The introduction of the degrader into an aberration-free optical design of a separator induces aberrations at the achromatic image. These may be completely eliminated by shaping the degrader appropriately. We have shown that, in order to eliminate these aberrations, some aberrations must be nonzero at the dispersive image, where the degrader is placed. A second order design with robust optics is presented. C1 [Bandura, L.; Erdelyi, B.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Nolen, J.] ANL Argonne, Argonne, IL 60439 USA. RP Bandura, L (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM bandura@anl.gov FU U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357] FX This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1645 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302017 ER PT B AU Borland, M Emery, L Sajaev, V AF Borland, M. Emery, L. Sajaev, V. GP IEEE TI Beam dynamics, performance, and tolerances for pulsed crab cavities at the advanced photon source for short x-ray pulse generation SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Advanced Photon Source (APS) has decided to implement a system [1] using pulsed crab cavities to produce short x-ray pulses using Zholents' [2] scheme. This paper describes beam dynamics issues related to implementation of this scheme with one-sector separation between the cavities. Modeling of the cavity is used to demonstrate that the deflection will be independent of transverse position in the cavity but that there is a position offset for undeflected particles. Configuration and parameter choices to optimize performance are discussed. Finally, tolerances are discussed and determined based on tracking simulations. C1 [Borland, M.; Emery, L.; Sajaev, V.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Borland, M (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. EM borland@aps.anl.gov NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1648 EP 1650 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302018 ER PT B AU Min, M Chin, YH Fischer, PF Chae, YC Kim, KJ AF Min, Misun Chin, Yong-Ho Fischer, Paul F. Chae, Yong-Chul Kim, Kwang-Je GP IEEE TI Fourier spectral simulations for wake fields in conducting cavities SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We investigate Fourier spectral time-domain simulations applied to wake field calculations in two-dimensional cylindrical structures. The scheme involves second-order explicit leap-frogging in time and Fourier spectral approximation in space, which is obtained from simply replacing the spatial differentiation oprator of the YEE scheme by the Fourier differentiation operator on nonstaggered grids. This is a first step toward investigating high-order computational techniques with the Fourier spectral method, which is relatively simple to implement. C1 [Min, Misun; Fischer, Paul F.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Chin, Yong-Ho] KEK High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. [Chae, Yong-Chul; Kim, Kwang-Je] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Min, M (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM mmin@mcs.anl.gov FU U.S. Dept. of Energy [DEAC02-06CH11357.] FX Work supported by the U.S. Dept. of Energy under Contract DEAC02- 06CH11357. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1651 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302019 ER PT B AU Min, M Fischer, PR Chae, YC AF Min, Misun Fischer, Paul R. Chae, Yong-Chul GP IEEE TI Spectral element discontinuous Galerkin simulations forwake potential calculations: Nekcem SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In this paper we present high-order spectral element discontinuous Galerkin simulations for wake field and wake potential calculations. Numerical discretizations are based on body-conforming hexagonal meshes on Gauss-Lobatto-Legendre grids. We demonstrate wake potential profiles for cylindrically symmetric cavity structures in 3D, including the cases for linear and quadratic transitions between two cross sections. Wake potential calculations are carried out on 2D surfaces for various bunch sizes. C1 [Min, Misun; Fischer, Paul R.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Chae, Yong-Chul] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Min, M (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM mmin@mcs.anl.gov FU U.S. Dept. of Energy [DEAC02-06CH11357] FX Work supported by the U.S. Dept. of Energy under Contract DEAC02- 06CH11357. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1654 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302020 ER PT B AU Sereno, NS Borland, M AF Sereno, Nicholas S. Borland, Michael GP IEEE TI Booster requirements for advanced photon source 1-nm emittance upgrade lattices SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB In recent years, we have explored various upgrade options for the Advanced Photon Source (APS) storage ring that would provide the user community with higher brightness. Increased brightness would be accomplished by reducing the emittance of the storage ring as well as increasing the stored beam current from 100 mA to 200 mA. Two upgrade lattices were developed [1] that reduce the effective beam emittance to 1 nm from the present 2.7 nm. These lattices have reduced dynamic aperture compared to the present ring lattice, which may require a reduced emittance booster to minimize injection losses. This paper describes injection tracking simulations that explore how high the booster emittance can be and still have no losses at injection for the 1-nm ring upgrade lattices. An alternative booster lattice is presented with reduced emittance compared to the present booster lattice (65 nm). C1 [Sereno, Nicholas S.; Borland, Michael] Argonne Natl Lab, Argonne, IL 60439 USA. RP Sereno, NS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM sereno@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1657 EP 1659 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302021 ER PT B AU Sun, YE Power, JG Kim, KJ Piot, P Rihaoui, MM AF Sun, Y-E Power, J. G. Kim, K. -J. Piot, P. Rihaoui, M. M. GP IEEE TI Design study of a transverse-to-longitudinal emittance exchange proof-of-principle experiment SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Transverse-to-longitudinal emittance exchange can be achieved through certain arrangements of dipole magnets and a dipole mode rf cavity. Theory on such schemes has been developed in the past several years. In this paper we report our numerical simulations to optimize a low energy (E similar or equal to 15 MeV) proof-of-principle experiment planned at the Argonne Wakefield Accelerator (AWA). Parametric studies of the dipole magnets and cavity strengths, as well as initial beam parameters, are presented. C1 [Sun, Y-E; Power, J. G.; Kim, K. -J.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Piot, P.] Northern Illinois Univ, De Kalb, IL 60115 USA. [Piot, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Rihaoui, M. M.] Northern Illinois Univ, De Kalb, IL 60115 USA. RP Sun, YE (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM yinesun@aps.anl.gov FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]; US. Department of Energy [DE-FG02-04ER41323] FX Work supported at ANL by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357, and at NIU by US. Department of Energy, under Contract No. DE-FG02-04ER41323. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1660 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302022 ER PT B AU Wang, Y Borland, M AF Wang, Y. Borland, M. GP IEEE TI Implementation and performance of parallelized elegant SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The program elegant is widely used for design and modeling of linacs for free-electron lasers and energy recovery linacs, as well as storage rings and other applications. As part of a multi-year effort, we have parallelized many aspects of the code, including single-particle dynamics, wakefields, and coherent synchrotron radiation. We report on the approach used for gradual parallelization, which proved very beneficial in getting parallel features into the hands of users quickly. We also report details of parallelization of collective effects. Finally, we discuss performance of the parallelized code in various applications. C1 [Wang, Y.; Borland, M.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Wang, Y (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ywang25@aps.ant.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1663 EP 1665 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302023 ER PT B AU Xiao, A Borland, M Sajaev, V AF Xiao, A. Borland, M. Sajaev, V. GP IEEE TI A1-nm emittance lattice for the advanced photon source storage ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present a triple-bend lattice design that uses the current APS tunnel. The new lattice has a 1 mn-rad effective emittance at 7 GeV. A forty-period symmetric optics is presented. For the benefit of some X-ray user experiments, an optics with four special straight sections of one-third the beam size of normal sections was investigated as well. The associated nonlinear optical difficulties are addressed and simulation results are presented. C1 [Xiao, A.; Borland, M.; Sajaev, V.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Xiao, A (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM xiaoam@aps.anl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1666 EP 1668 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302024 ER PT B AU Xiao, A Emery, L AF Xiao, A. Emery, L. GP IEEE TI International linear collider damping ring lattice design SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present a lattice design based on the theoretical-minimum-emittance (TME) cell for the International Linear Collider (ILC) 6.6-km 5-GeV damping ring. Several areas are discussed: momentum compaction, lattice layout, injection and extraction, circumference adjusters, phase adjuster, and dynamic aperture calculation with multipole errors. C1 [Xiao, A.; Emery, L.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Xiao, A (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM xiaoam@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1669 EP 1671 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302025 ER PT B AU Xiao, A Borland, M Emery, L Wang, Y Ng, KY AF Xiao, A. Borland, M. Emery, L. Wang, Y. Ng, K. Y. GP IEEE TI Direct space-charge calculation in elegant and its application to the ILC damping ring SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A direct space-charge force model has been implemented in the tracking code elegant [1]. The user can simulate transverse space-charge effects by inserting space-charge elements in the beamline at any desired position. Application to the International Linear Collider damping ring is presented in this paper. We simulated beam under equilibrium conditions, as well as the entire damping cycle from injection to extraction. Results show that beam halo is generated due to space-charge effects. This would be a significant concern for the ILC damping ring and a detailed follow-up study is needed. C1 [Xiao, A.; Borland, M.; Emery, L.; Wang, Y.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Ng, K. Y.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Xiao, A (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM xiaoam@aps.anl.gov FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02- 06CH11357. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1675 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302027 ER PT B AU Xu, J Mustapha, B Aseev, VN Ostroumov, PN AF Xu, J. Mustapha, B. Aseev, V. N. Ostroumov, P. N. GP IEEE TI Parallelization of track for large scale beam dynamics simulation in linear accelerators SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Large scale beam dynamics simulations are important to support the design and operations of an accelerator. From the beginning, the beam dynamics code TRACK was developed to make it useful in the three stages of a hadron (proton and heavy-ion) linac project, namely the design, commissioning and operation of the machine. In order to combine the unique features of TRACK with large scale and fast parallel computing we have recently developed a parallel version of the code. We have successfully benchmarked the parallel TRACK on different platforms: BG/L and Jazz at ANL, Iceberg at ARSC, Lemieux at PSC and Seaborg at NERSC. We have performed large scale end-to-end simulations of the FNAL proton driver where 10(8) particles were tracked. The actual parallel version has the potential of simulating 10(9) particles on 10 racks with 20,480 processors of BG/L at ANL, which will be available next year. After a brief description of the parallel TRACK, we will present results from highlight applications. C1 [Xu, J.; Mustapha, B.; Aseev, V. N.; Ostroumov, P. N.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Xu, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jin_xu@anl.gov RI Xu, Jin/C-7751-2014 OI Xu, Jin/0000-0002-1147-7408 NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1678 EP 1680 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302028 ER PT B AU Sayyar-Rodsari, B Schweiger, C Hartman, E Schmerge, J Lee, M Lui, P Paterson, E AF Sayyar-Rodsari, B. Schweiger, C. Hartman, E. Schmerge, J. Lee, M. Lui, P. Paterson, E. GP IEEE TI Parametric modeling of transverse phase space of an rf photoinjector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB High brightness electron beam sources such as rf photo-injectors as proposed for SASE FELs must consistently produce the desired beam quality. We report the results of a study in which a combined neural network (NN) and first-principles (FP) model is used to model the transverse phase space of the beam as a function of quadrupole strength, while beam charge, solenoid field, accelerator gradient, and linac voltage and phase are kept constant. The parametric transport matrix between the exit of the linac section and the spectrometer screen constitutes the FP component of the combined model. The NN block provides the parameters of the transport matrix as functions of quad current. Using real data from SLAC Gun Test Facility, we will highlight the significance of the constrained training of the NN block and show that the phase space of the beam is accurately modeled by the combined NN and FP model, while variations of beam matrix parameters with the quad current are correctly captured. We plan to extend the combined model in the future to capture the effects of variations in beam charge, solenoid field, and accelerator voltage and phase. C1 [Sayyar-Rodsari, B.; Schweiger, C.; Hartman, E.] Pavilion Technol Inc, Austin, TX 78759 USA. [Schmerge, J.; Lee, M.; Lui, P.; Paterson, E.] SLAC, Menlo Pk, CA 94025 USA. RP Sayyar-Rodsari, B (reprint author), Pavilion Technol Inc, Austin, TX 78759 USA. EM bijan@pavtech.com FU DOE STTR [DE-FG02-04ER86225]; DOE-Stanford [DE-AC02-76SF00515] FX Work supported by DOE STTR Grant DE-FG02-04ER86225 and DOE-Stanford contract DE-AC02-76SF00515. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1681 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302029 ER PT B AU Miyamoto, R Kopp, SE Jannson, A Syphers, MJ AF Miyamoto, R. Kopp, S. E. Jannson, A. Syphers, M. J. GP IEEE TI Tevatron optics measurements using an AC dipole SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The AC dipole is a device to study beam optics of hadron synchrotrons. It can produce sustained large amplitude oscillations with virtually no emittance growth. A vertical AC dipole for the Tevatron is recently implemented and a maximum oscillation amplitude of 2 sigma (4 sigma) at 980 GeV (150 GeV) is achieved [1]. When such large oscillations are measured with the BPM system of the Tevatron (20 mu m resolution), not only linear but even nonlinear optics can be directly measured. This paper shows how to measure beta function using an AC dipole and the result is compared to the other measurement. The paper also shows a test to detect optics changes when small changes are made in the Tevatron. Since an AC dipole is nondestructive, it allows frequent measurements of the optics which is necessary for such an test. C1 [Miyamoto, R.; Kopp, S. E.] Univ Texas Austin, Austin, TX 78712 USA. [Jannson, A.; Syphers, M. J.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Miyamoto, R (reprint author), Univ Texas Austin, Austin, TX 78712 USA. FU Fermilab Research Alliance, LLC with the United States Department of Energy [DE-AC02-07CH11359] FX Work supported by Fermilab Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1684 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302030 ER PT B AU Alexahin, Y Drozhin, A Kazarinov, N Yang, X AF Alexahin, Y. Drozhin, A. Kazarinov, N. Yang, Xi GP IEEE TI Effects of space charge and magnet nonlinearities on beam dynamics in the fermilab booster SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Presently the Fermilab Booster can accommodate about half the maximum proton beam intensity which the Linac can deliver. One of the limitations is related to large vertical tuneshift produced by space-charge forces at injection energy. In the present report we study the nonlinear beam dynamics in the presence of space charge and magnet imperfections and analyze the possibility of space charge compensation with electron lenses. C1 [Alexahin, Y.; Drozhin, A.; Kazarinov, N.; Yang, Xi] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Alexahin, Y (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM alexahin@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1693 EP 1695 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302033 ER PT B AU Alexahin, Y Gianfelice-Wendt, E AF Alexahin, Y. Gianfelice-Wendt, E. GP IEEE TI TBT optics and impedance measurements at the Fermilab main injector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Fourier analysis of Turn by Turn (TBT) data provides valuable information about the machine linear and non-linear optics. This technique introduced first at Fermilab in 2006 for correcting the Tevatron linear coupling, has been now extended to the Main Injector with the aim of a better understanding of the beam dynamics, in particular in view of a substantial beam intensity increase in the frame of the laboratory neutrino program. C1 [Alexahin, Y.; Gianfelice-Wendt, E.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Alexahin, Y (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1699 EP 1701 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302035 ER PT B AU Snopok, P Berz, M Johnstone, C AF Snopok, Pavel Berz, Martin Johnstone, Carol GP IEEE TI A new lattice design for a 1.5 TeV com muon collider consistent with the Tevatron tunnel SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A recent effort is underway to design an efficient match of a Muon Collider to the Fermilab site, potentially using the Tevatron tunnel after decommissioning. This work represents a new design for such a collider with emphasis on shortened IR and systematic high-order correction and dynamics studies. With a 1 cm beta*, simultaneous control of geometric and chromatic aberrations is critical and can only be achieved through the deliberate addition of nonlinear fields in the Interaction Region itself. This work studies both the correction schemes and the unavoidable impact of high-order correctors - sextupoles, octupoles and even duodecapoles - located in the Interaction Region close to the low-beta quadrupoles or focusing elements. This study proposes and systematically addresses the aberrations for different systems of nonlinear correctors and optimizes performance of an advanced IR. C1 [Snopok, Pavel] SPbSU, St Petersburg, Russia. [Berz, Martin] MSU, E Lansing, MI 48824 USA. [Johnstone, Carol] Fermilab Natl Accelerator Lab, Batavia, IL USA. RP Snopok, P (reprint author), SPbSU, St Petersburg, Russia. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1702 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302036 ER PT B AU Ostiguy, JF Michelotti, L AF Ostiguy, J. -F. Michelotti, L. GP IEEE TI CHEF: A status report SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB CHEF refers both to a framework and to an interactive application emphasizing accelerator optics calculations. The framework supports multiple domains of applications: e.g. nonlinear analysis, perturbation theory, and tracking. Its underlying philosophy is to provide an infrastructure with minimum hidden implicit assumptions, general enough to facilitate both routine and specialized computational tasks, and to minimize the duplication of necessary, complex bookkeeping tasks. CHEF was already described in recent conferences [1, 2]. This paper is a status report on recent developments, including issues related to applications to high energy linacs. C1 [Ostiguy, J. -F.; Michelotti, L.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ostiguy, JF (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1705 EP 1707 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302037 ER PT B AU Ostiguy, JF Michelotti, L AF Ostiguy, J. -F. Michelotti, L. GP IEEE TI Mxyzptlk: An eficient, native C++ differentiation engine SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Mxyzptlk was among the earliest implementations of a differentiation engine reported in the literature [ 1, 2]. It was created with an eye to enabling accelerator related computations, especially within the realm of perturbation theories. Such computations are supported by (1) a one-to-one correspondence between original mathematical abstractions and the data types and operations used to implement them and (2) accurate computation of high order derivatives. To this day, mxyzptlk distinguishes itself by being among the few available implementations that takes full advantage of the native operator overloading capabilities of their implementation language. Recently, significant efforts were expanded in modernizing mxyzptlk, both architecturally and algorithmically, resulting in substantially improved performance, maintainability and usability. We present an overview of the mxyzptlk internals and summarize current capabilities and performance. C1 [Ostiguy, J. -F.; Michelotti, L.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ostiguy, JF (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1708 EP 1710 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302038 ER PT B AU Syphers, MJ Miyamoto, R AF Syphers, M. J. Miyamoto, R. GP IEEE TI Direct measurements of beta-star in the Tevatron SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Simultaneous turn-by-turn beam position measurements across collider detector long straight sections provide full phase space information of a free oscillation. For signals with enough coherence (typically 1-2000 revolutions) the amplitude function and its slope at the two BPM's can be directly measured. Results for the Tevatron low-beta regions with a few percent accuracy are described. C1 [Syphers, M. J.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Miyamoto, R.] Univ Texas Austin, Austin, TX 78712 USA. RP Syphers, MJ (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. FU Fermi Research Alliance, LLC [DE-AC02-07CH11359] FX Work supported by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1714 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302040 ER PT B AU Yang, MJ AF Yang, M. J. GP IEEE TI Lattice measurement for Fermilab Main Injector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The installation of seven large aperture quadrupoles during shut-down of 2006 necessitates new lattice measurements to evaluate the state of the machine lattice at energies critical to operation. For Main Injector (MI) this means at 8-GeV kinetic energy for proton and pbar injections, at 150-GeV extraction to Tevatron for collider operation, and at 120-GeV extraction to Numi for nutrino experiment and slow spill to fixed target test beam facility. The results of measurement at these three energies and their comparison to their corresponding calculations will be presented. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Yang, MJ (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM yang@fnal.gov NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1717 EP 1719 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302041 ER PT B AU Zhang, X Chen, AZ Chou, W Hanna, BM Ng, KY Ostiguy, JF Valerio, L Zwaska, RM AF Zhang, Xiaolong Chen, Alex Zuxing Chou, Weiren Hanna, Bruce M. Ng, King Yuen Ostiguy, Jean-Francois Valerio, Linda Zwaska, Robert Miles GP IEEE TI Electron cloud studies at Tevatron and Main Injector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Estimates indicate that the electron cloud effect could be a limiting factor for Main Injector intensity upgrades, with or without the presence of a new 8 GeV superconducting 8GeV Linac injector. The effect may turn out to be an issue of operational relevance for other parts of the Fermilab accelerator complex as well. To improve our understanding of the situation, two sections of specially made vacuum test pipe outfitted for electron cloud detection with ANL provided Retarding Field Analyzers (RFAs) were installed in the Tevatron and the Main Injector. In this report we present some measurements and discuss future plans for studies. C1 [Zhang, Xiaolong; Chen, Alex Zuxing; Chou, Weiren; Hanna, Bruce M.; Ng, King Yuen; Ostiguy, Jean-Francois; Valerio, Linda; Zwaska, Robert Miles] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Zhang, X (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1720 EP 1722 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302042 ER PT B AU Zhang, XL Ostiguy, JF AF Zhang, Xiaolong Ostiguy, Jean-Francois GP IEEE TI Simulations of the electron cloud buildups and suppressions in Tevatron and Main Injector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB To assess the effects of the electron cloud on Main Injector intensity upgrades, simulations of the cloud buildup were carried out using POSINST and compared with ECLOUD. Results indicate that even assuming an optimistic 1.3 maximum secondary electron yield, the electron cloud remains a serious concern for the planned future operational of mode of 500 bunches, 3e11 proton per bunch. Electron cloud buildup can be mitigated in various ways. We consider a plausible scenario involving solenoids in straight section and a single clearing strip electrode (like SNEG in Tevatron) held at a potential of 500V. Simulations with parameters corresponding to Tevatron and Main Injector operating conditions at locations where special electron cloud detectors have been installed have been carried out and are in satisfactory agreement with preliminary measurements. C1 [Zhang, Xiaolong; Ostiguy, Jean-Francois] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Zhang, X (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1723 EP 1725 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302043 ER PT B AU Anderson, OA LoDestro, LL AF Anderson, O. A. LoDestro, L. L. GP IEEE TI Exact analytic solution of the envelope equations for a matched quadrupole-focused beam in the lowspace charge limit SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Kapchinskij-Vladimirskij equations describe the evolution of the beam envelopes in a periodic system of quadrupole focusing cells and are widely used to help predict the performance of such systems. Being nonlinear, they are usually solved by numerical integration. There have been numerous papers describing approximate solutions with varying degrees of accuracy. We have found an exact solution for a matched beam in the limit of zero space charge. The model is FODO with a full occupancy, piecewise-constant focusing function. Our explicit result for the envelope a(z) is exact for phase advances up to 180 degrees and all other values except multiples of 180 degrees. The peak envelope size is minimized at 90 degrees. The higher stable bands require large, very accurate, field strengths while producing significantly larger envelope excursions. C1 [Anderson, O. A.] LBNL, Berkeley, CA 94720 USA. [LoDestro, L. L.] LLNL, Livermore, CA 94551 USA. RP Anderson, OA (reprint author), LBNL, Berkeley, CA 94720 USA. FU U.S. DOE [DE-AC02-05CH11231] FX Work partly supported by U.S. DOE contract DE-AC02-05CH11231. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1732 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302046 ER PT B AU Coleman, JE Ogata, D Seidl, PA Roy, PK Gilson, EP Sefkow, AB Welch, DR AF Coleman, J. E. Ogata, D. Seidl, P. A. Roy, P. K. Gilson, E. P. Sefkow, A. B. Welch, D. R. GP IEEE TI Bunching and focusing of an intense ion beam for target heating experiments SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An experiment to focus transversely and simultaneously axially bunch a space charge neutralized K+ ion beam has been carried out at LBNL. The principal objectives of the simultaneous bunching and focusing experiments are to control the beam envelope, demonstrate effective neutralization of the beam space-charge, control the velocity tilt on beam, understand effects of net defocusing, field imperfections, limitations on minimal spot size such as emittance and aberrations and to quantify the longitudinal phase space. A demonstration of increased axial compression and a reduction in spot size compared to earlier measurements is presented. C1 [Coleman, J. E.; Ogata, D.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. [Seidl, P. A.; Roy, P. K.] LBNL, Berkeley, CA 94720 USA. [Gilson, E. P.; Sefkow, A. B.] PPPL, Princeton, NJ 08543 USA. [Welch, D. R.] Voss Sci, Albuquerque, NM 87108 USA. RP Coleman, JE (reprint author), Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. FU US DOE [DE-AC02- 05H11231, E-AC02-76CH3073] FX Work supported by US DOE under Contract No. DE-AC02- 05H11231 and DE-AC02-76CH3073 for HIFS-VNL. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1735 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302047 ER PT B AU Qiang, J Pogorelov, IV Ryne, RD AF Qiang, Ji Pogorelov, Ilya V. Ryne, Robert D. GP IEEE TI Parallel beam dynamics simulation tools for future light source linac modeling SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Large-scale modeling on parallel computers is playing an increasingly important role in the design of future light sources. Such modeling provides a means to accurately and efficiently explore issues such as limits to beam brightness, emittance preservation, the growth of instabilities, etc. Recently the IMPACT codes suite was enhanced to be applicable to future light source design. Simulations with IMPACT-Z were performed using up to one billion simulation particles for the main linac of a future light source to study the microbunching instability. Combined with the time domain code IMPACT-T, it is now possible to perform large-scale start-to-end linac simulations for future light sources, including the injector, main linac, chicanes, and transfer lines. In this paper we provide an overview of the IMPACT code suite, its key capabilities, and recent enhancements pertinent to accelerator modeling for future linac-based light sources. C1 [Qiang, Ji; Pogorelov, Ilya V.; Ryne, Robert D.] LBNL, Berkeley, CA 94720 USA. RP Qiang, J (reprint author), LBNL, Berkeley, CA 94720 USA. EM rdryne@lbl.gov NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1741 EP 1743 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302049 ER PT B AU Sonnad, K Furman, M Veitzer, S Stoltz, P Cary, J AF Sonnad, Kiran Furman, Miguel Veitzer, Seth Stoltz, Peter Cary, John GP IEEE TI Simulation and analysis of microwave transmission through an electron cloud, a comparison of results SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Simulation studies for transmission of microwaves through electron cloudes show good agreement with analytic results. The elctron cloud produces a shift in phase of the microwave. Experimental observation of this phenomena would lead to a useful diagnostic tool for acessing the local density of electron clouds in an accelerator. These experiments are being carried out at the CERN SPS and the PEP-II LER at SLAC and is proposed to be done at the Fermilab maininjector. In this study, a brief analysis of the phase shift is provided and the results are compared with that obtained from simulations. C1 [Sonnad, Kiran; Furman, Miguel] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Veitzer, Seth; Stoltz, Peter; Cary, John] TechX Corp, Boulder, CO USA. RP Sonnad, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1744 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302050 ER PT B AU Lin, F Lee, SY Ahrens, LA Bai, M Brown, KA Courant, ED Glenn, JW Huang, H Luccio, AU MacKay, WW Roser, T Tsoupas, N AF Lin, F. Lee, S. Y. Ahrens, L. A. Bai, M. Brown, K. A. Courant, E. D. Glenn, J. W. Huang, H. Luccio, A. U. MacKay, W. W. Roser, T. Tsoupas, N. GP IEEE TI Investigation of residual vertical intrinsic resonances with dual partial Siberian snakes in the AGS SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Two partial helical dipole snakes were found to be able to overcome all imperfection and intrinsic spin resonances provided that the vertical betatron tunes were maintained in the spin tune gap near the integer 9. Recent vertical betatron tune scan showed that the two weak resonances at the beginning of the acceleration cycle may be the cause of polarization loss. This result has been confirmed by the vertical polarization profile measurement, and spin tracking simulations. Possible cure of the remaining beam polarization is discussed. C1 [Lin, F.; Lee, S. Y.] Indiana Univ, Bloomington, IN 47405 USA. [Ahrens, L. A.; Bai, M.; Brown, K. A.; Courant, E. D.; Glenn, J. W.; Huang, H.; Luccio, A. U.; MacKay, W. W.; Roser, T.; Tsoupas, N.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Lin, F (reprint author), Indiana Univ, Bloomington, IN 47405 USA. FU NSF [PHY-0552389]; DOE [DE-FG02-92ER40747, DE-AC02-98CH1-886]; RIKEN(Japan); Renaissance Technologies Corp.(USA) FX Work supported by NSF PHY-0552389 and DOE DE-FG02-92ER40747 and DE-AC02-98CH1-886, and with support of RIKEN(Japan) and Renaissance Technologies Corp.(USA) NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1753 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302053 ER PT B AU Sato, Y Holmes, J Lee, SY Macek, R AF Sato, Y. Holmes, J. Lee, S. Y. Macek, R. GP IEEE TI Electron cloud simulations to cold PSR proton bunches SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present ORBIT code simulations to examine the sensitivity of electron cloud properties to different proton beam profiles and to reproduce experimental results measured at the proton storage ring (PSR) at the Los Alamos National Laboratory. Using cold proton bunch model, we study the dependence of the prompt and swept electron intensities vs the bunch charge and the recovery of electron clouds after sweeping on the beam loss rate and the secondary electron yield (SEY). Our simulations indicate that the fractional proton loss rate in the field-free straight section may be an exponential function of proton beam charge and may also be lower than the averaged fractional proton loss rate in a whole ring. C1 [Sato, Y.] Indiana Univ, Bloomington, IN 47405 USA. [Holmes, J.] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Lee, S. Y.] Indiana Univ, Bloomington, IN 47405 USA. [Macek, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sato, Y (reprint author), Indiana Univ, Bloomington, IN 47405 USA. EM yoichisato@riken.ip FU SNS through UT-Battelle; LLC; U.S. DOE [E-AC05-00OR22725]; Indiana Univer- sity at Bloomington under NSF [PHY-0552389]; DOE [DE-FG02-92ER40747]; Los Alamos National Laboratory [W-7405-ENG-36] FX This work is supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE, by Indiana Univer- sity at Bloomington under contract PHY-0552389 for NSF and contract DE-FG02-92ER40747 for DOE, and by Los Alamos National Laboratory under contract W-7405-ENG-36. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1759 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302055 ER PT B AU Bellt, GI Bruhwiler, DL Sobol, A Ben-Zvi, I Fedotov, A Litvinenko, V AF Bellt, George I. Bruhwiler, David L. Sobol, Andrey Ben-Zvi, Ilan Fedotov, Alexei Litvinenko, Vladimir GP IEEE TI Numerical algorithms for modeling electron cooling in the presence of external fields SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SIMULATION AB The design of the high-energy cooler for the Relativistic Heavy Ion Collider (RHIC) recently adopted a nonmagnetized approach. To prevent recombination between the fully stripped gold ions and co-propagating electrons, a helical undulator magnet has been proposed. In addition, to counteract space-charge defocusing, weak solenoids are proposed every 10m. To understand the effect of these magnets on the cooling rate, numerical models of cooling in the presence of external fields are needed. We present an approach from first principles using the VORPAL parallel simulation code. We solve the n-body problem by exact calculation of pair-wise collisions. Simulations of the proposed RHIC cooler are discussed, including fringe field and finite interaction time effects. C1 [Bellt, George I.; Bruhwiler, David L.; Sobol, Andrey] Tech X Corp, Boulder, CO 80303 USA. [Ben-Zvi, Ilan; Fedotov, Alexei; Litvinenko, Vladimir] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Bellt, GI (reprint author), Tech X Corp, Boulder, CO 80303 USA. EM gibell@txcorp.com FU U.S. Department of Energy; Office of Science; Office of Nuclear Physics [DE-FG02-04ER84094] FX Work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-FG02-04ER84094. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1768 EP 1770 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302058 ER PT B AU Dechow, DR Abell, DT Stoltz, P McInnes, LC Norris, B Amundson, JF AF Dechow, Douglas Ricker Abell, Dan Tyler Stoltz, Peter McInnes, Lois Curfman Norris, Boyana Amundson, James Frederick GP IEEE TI A beam dynamics application based on the common component architecture SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SIMULATION AB A prototype of a component-based beam dynamics application has been developed. The Common Component Architecture (CCA) [5] software infrastructure was used to compose a new Python-steered, FODO-cell simulation from a set of beamline elements provided by MaryLie/IMPACT (ML/I) [1]. The prototyped FODO-cell simulation is preparatory work for a larger, ongoing effort to model collective effects using a component-based version of the Synergia2 [12] beam dynamics framework. Synergia2 coordinates a suite of modeling services provided by two separate beam dynamics packages (Impact [10] and Chef) and two high-performance computer science packages (PETSc [3] and FFTW [7]). ne development of the proof-of-concept application was accomplished via the following tasks: 1) addressing multilanguage interoperability in the ML/I code with Babel; 2) creating the necessary components by making the selected software objects adhere to the CCA protocol; and 3) assemblying the components with a newly developed, Component Builder gui. The eventual, component-based beam dynamics application will allow the Synergia2 framework to evolve simultaneously with the modeling and simulation requirements of the International Linear Collider (ILC). C1 [Dechow, Douglas Ricker; Abell, Dan Tyler; Stoltz, Peter] Tech X Corp, Boulder, CO 80303 USA. [McInnes, Lois Curfman; Norris, Boyana] Argonne Natl Lab, Argonne, IL 60439 USA. [Amundson, James Frederick] Fermi Lab, Batavia, IL 60510 USA. RP Dechow, DR (reprint author), Tech X Corp, Boulder, CO 80303 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1771 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302059 ER PT B AU Haber, I Bernal, S Kishek, RA O'Shea, PG Papadopoulos, C Reiser, M Feldman, RB Stratakis, D Walter, M Vay, JL Friedman, A Grote, DP AF Haber, I. Bernal, S. Kishek, R. A. O'Shea, P. G. Papadopoulos, C. Reiser, M. Feldman, R. B. Stratakis, D. Walter, M. Vay, J. -L. Friedman, A. Grote, D. P. GP IEEE TI Measurement and simulation of source-generated halos in the University of Maryland Electron Ring (UMER) SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB One of the areas of fundamental beam physics that have served as the rationale for recent research on UMER is the study of the generation and evolution of beam halos. Recent experiments and simulations have identified imperfections in the source geometry, particularly in the region near the emitter edge, as a significant potential source of halo particles. The edge-generated halo particles, both in the experiments and the simulations are found to pass through the center of the beam a short distance downstream of the anode plane. Understanding the detailed evolution of these particle orbits is therefore important to designing any aperture to remove the beam halo. C1 [Haber, I.; Bernal, S.; Kishek, R. A.; O'Shea, P. G.; Papadopoulos, C.; Reiser, M.; Feldman, R. B.; Stratakis, D.; Walter, M.] UMD, College Pk, MD USA. [Vay, J. -L.] LBNL, Berkeley, CA 94720 USA. [Friedman, A.; Grote, D. P.] LLNL, Livermore, CA USA. RP Haber, I (reprint author), UMD, College Pk, MD USA. EM haber@umd.edu FU US DOE [DE-FG02-02ER54672, DE-FG02-94ER40855, DE-AC02-05CH11231, W-7405-ENG-48] FX Work supported by his work is supported by the US DOE under contract Nos. DE-FG02-02ER54672 and DE-FG02-94ER40855 (UMD), and DE-AC02-05CH11231 (LBNL) and W-7405-ENG-48 (LLNL). NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1783 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302063 ER PT B AU Erdelyi, B Bandura, L Nolen, J Manikonda, S AF Erdelyi, B. Bandura, L. Nolen, J. Manikonda, S. GP IEEE TI Code development for next-generation high-intensity large acceptance fragment separators SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A suite of nuclear and atomic physics codes for computing a variety of quantities relevant for heavy-ions over a Aide energy range passing through material were implemented in the DA-based beam optics code COSY Infinity. As extensions to COSY we also developed a limited fission model, map computation for beam-material interactions, and a hybrid map-Monte-Carlo mode that allows relatively fast and accurate fragment separator design, end-to-end modeling and simulations, and performance optimization. Some results are briefly mentioned; details will be published elsewhere. C1 [Erdelyi, B.; Bandura, L.] NIU, De Kalb, IL 60115 USA. [Bandura, L.; Nolen, J.; Manikonda, S.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Erdelyi, B (reprint author), NIU, De Kalb, IL 60115 USA. EM erdelyi@an1.gov RI Manikonda, Shashikant/D-6936-2011 FU U.S. Department of Energy; Office of Nuclear Physics [DE-AC02-06CH11357] FX We would like to thank I. Gomes for providing the MCNPX data we used to generate our fission database, T. Barlow for work on the COSY extensions, and M. Berzs group on work related to wedge maps. This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1795 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302067 ER PT B AU Harris, JR Feldman, RB O'Shea, PG AF Harris, J. R. Feldman, R. B. O'Shea, P. G. GP IEEE TI Transverse-longitudinal coupling in an intense electron beam SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB This paper describes the longitudinal expansion of a 10 keV, 100 mA electron beam in the University of Maryland Electron Ring. The expansion of the beam tail was found to be sensitive to the choice of transverse focusing settings due to the presence of an abnormality in the beam current profile. Expansion of the beam head, where no abnormality was observed, is in good agreement with the one-dimensional cold fluid model. C1 [Harris, J. R.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Feldman, R. B.; O'Shea, P. G.] Univ Maryland, College Pk, MD 20740 USA. RP Harris, JR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM harris89@llnl.gov FU Department of Energy; Office of Naval Research; Directed Energy Professional Society; U.S. Department of Energy; University of California; Lawrence Livermore National Laboratory [W-6405-Eng-48] FX The authors would like to thank S. Bernal and M. Walter for use of their transverse matching solutions. This research was supported by the Department of Energy, the Office of Naval Research, and the Directed Energy Professional Society. This paper was prepared under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract W-6405-Eng-48. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1816 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302074 ER PT B AU Sharp, WM Grote, DP Cohen, RH Friedman, A Molvik, AW Vay, JL Seidl, PA Roy, PK Coleman, JE Haber, I AF Sharp, W. M. Grote, D. P. Cohen, R. H. Friedman, A. Molvik, A. W. Vay, J. -L. Seidl, P. A. Roy, P. K. Coleman, J. E. Haber, I. GP IEEE TI Simulating electron effects in heavy-ion accelerators with solenoid focusing SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID CLOUDS; BEAMS AB Contamination from electrons is a concern for solenoid-focused ion accelerators being developed for experiments in high-energy-density physics. These electrons, produced directly by beam ions hitting lattice elements or indirectly by ionization of desorbed neutral gas, can potentially alter the beam dynamics, leading to a time-varying focal spot, increased emittance, halo, and possibly electron-ion instabilities. The electrostatic particle-in-cell code WARP is used to simulate electron-cloud studies on the solenoid-transport experiment (STX) at Lawrence Berkeley National Laboratory. We present self-consistent simulations of several STX configurations and compare the results with experimental data in order to calibrate physics parameters in the model. C1 [Sharp, W. M.; Grote, D. P.; Cohen, R. H.; Friedman, A.; Molvik, A. W.] LLNL, Livermore, CA 94550 USA. [Vay, J. -L.; Seidl, P. A.; Roy, P. K.; Coleman, J. E.] Univ Maryland, College Pk, MD 20742 USA. [Vay, J. -L.; Seidl, P. A.; Roy, P. K.; Coleman, J. E.] LBNL, Berkeley, CA 94720 USA. RP Sharp, WM (reprint author), LLNL, Livermore, CA 94550 USA. FU US Department of Energy; University of California Lawrence Livermore; Lawrence Berkeley National Laboratories [W-7405-Eng-48, DE-AC03-76SF00098] FX This work was performed under the auspices of the US Department of Energy by the University of California Lawrence Livermore and Lawrence Berkeley National Laboratories under contracts W-7405-Eng-48 and DE-AC03-76SF00098. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1822 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302076 ER PT B AU Wangler, TP Garnett, RW Qiang, J Ryne, R Crandall, KR Billen, JH Aseev, VN Mustapha, B Ostroumov, P Doleans, M Gorelov, D Wu, X York, RC Zhao, Q AF Wangler, T. P. Garnett, R. W. Qiang, J. Ryne, R. Crandall, K. R. Billen, J. H. Aseev, V. N. Mustapha, B. Ostroumov, P. Doleans, M. Gorelov, D. Wu, X. York, R. C. Zhao, Q. GP IEEE TI The RIAPMTQ/IMPACT beam-dynamics simulation package SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The Fortran 90 RIAPMTQ/IMPACT code package is a pair of linked beam-dynamics simulation codes that have been developed for end-to-end computer simulations of multiple-charge state heavy-ion linacs for future exotic-beam facilities. The simulations can extend from the low-energy beam-transport line after the ECR ion source to the end of the linac. The work has been performed by a collaboration including LANL, LBNL, ANL, and MSU. The code RIAPMTQ simulates the linac: front end including the LEBT, RFQ, and MEBT, and the code IMPACT simulates the main superconducting linac. The codes have been benchmarked for rms beam properties against previously existing codes at ANL and MSU. The codes allow high-statistics runs on parallel supercomputing platforms, such as NERSC at LBNL for studies of beam losses. The codes also run on desktop PC computers for low-statistics design work. We show results from 10-million-particle simulations at NERSC of designs by ANL and MSU for the Rare-Isotope Accelerator. C1 [Wangler, T. P.; Garnett, R. W.] LANL, Los Alamos, NM 87544 USA. RP Wangler, TP (reprint author), LANL, Los Alamos, NM 87544 USA. FU U.S. Department of Energy [W-7405-ENG-36] FX This work is supported by the U.S. Department of Energy, DOE contract number:W-7405-ENG-36 NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1825 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302077 ER PT B AU Ding, Y Huang, Z Limborg-Deprey, C Qiang, J AF Ding, Y. Huang, Z. Limborg-Deprey, C. Qiang, J. GP IEEE TI LCLS beam dynamics studies with the 3-D parallel Impact-T code SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the beam dynamics studies with the 3-D Parallel Impact-T code on the Linac Coherent Light Source (LCLS) injector system. The physics model and recent additions of the Impact-T code are reviewed, and the space charge simulation studies are described. Simulation results show that for the normal design parameters of the LCLS with a smooth laser profile, the space charge effects above 135 MeV are negligible. However, the electron bunch can form a very-high current spike after the bunch compressor. In this case space charge still play an important role in affecting the beam quality in both longitudinal and transverse directions. C1 [Ding, Y.; Huang, Z.; Limborg-Deprey, C.] SLAC, Menlo Pk, CA 94025 USA. [Qiang, J.] LBNL, Berkeley, CA 94720 USA. RP Ding, Y (reprint author), SLAC, Menlo Pk, CA 94025 USA. FU Department of Energy [DE-AC02-76SF00515] FX This work was supported by Department of Energy Contracts No. DE-AC02-76SF00515. NR 14 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1843 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302083 ER PT B AU Krasnykh, A AF Krasnykh, A. GP IEEE TI Employment of second order ruled surfaces in design of sheet beam guns SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A novel 3D method of sheet beam (SB) gun design has recently been developed [1]. Second order ruled surfaces (SORS) to define the geometry of the gun electrodes. The gun design process is made simpler if SORS are derived from analytical formulas. A proposed method is discussed and illustrated. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Krasnykh, A (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. NR 1 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1849 EP 1851 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302085 ER PT B AU Krasnykh, A AF Krasnykh, Anatoly GP IEEE TI e-/e plus accelerating structure with cyclic variation of azimuth asymmetry SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A classical electron/positron accelerating structure is a disk-loaded cylindrical waveguide. The accelerator structure here has azimuth symmetry. The proposed structure [1] contains a disk-loaded cylindrical waveguide where there is a periodical change of RF-field vs. azimuth. The modulation deforms the rf-field in such a manner that the accelerated particles undergo transverse focusing forces. The new class of accelerator structures covers the initial part of e+/e- linacs where a bunch is not rigid and additional transverse focusing fields are necessary. We discuss a bunch formation with a high transverse aspect ratio in the proposed structure and particularly in the photoinjector part of a linac. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Krasnykh, A (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1852 EP 1854 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302086 ER PT B AU Pivi, MTF AF Pivi, M. T. F. GP IEEE TI CMAD: A new self-consistent parallel code to simulate the electron cloud build-up and instabilities SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB We present the features of CMAD, a newly developed self-consistent code which simulates both the electron cloud build-up and related beam instabilities. By means of parallel (Message Passing Interface - MPI) computation, the code tracks the beam in an existing (MAD-type) lattice and continuously resolves the interaction between the beam and the cloud at each element location, with different cloud distributions at each magnet location. The goal of CMAD is to simulate single- and coupled-bunch instability, allowing tune shift, dynamic aperture and frequency map analysis and the determination of the secondary electron yield instability threshold. The code is in its phase of development and benchmarking with existing codes. Preliminary results on benchmarking are presented in this paper. C1 SLAC, Menlo Pk, CA 94025 USA. RP Pivi, MTF (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1855 EP 1857 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302087 ER PT B AU Wang, L AF Wang, L. GP IEEE TI Adaptive impedance analysis of grooved surface using the finite element method SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Grooved surface is proposed to reduce the secondary emission yield in a dipole and wiggler magnet of International Linear Collider. An analysis of the impedance of the grooved surface based on adaptive finite element is presented in this paper. The performance of the adaptive algorithms, based on an element-element h-refinement technique, is assessed. The features of the refinement indictors, adaptation criteria and error estimation parameters are discussed. C1 SLAC, Menlo Pk, CA USA. RP Wang, L (reprint author), SLAC, Menlo Pk, CA USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1858 EP 1860 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302088 ER PT B AU Wittmer, W AF Wittmer, W. GP IEEE TI Calculating IP tuning knobs for the PEP II high energy ring using Singular Value Decomposition, Response Matrices and an Adapted Moore Penrose method SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The PEP II lattices are unique in their detector solenoid field compensation scheme by utilizing a set of skew quadrupoles in the IR region and the adjacent arcs left and right of the IP. Additionally, the design orbit through this region is nonzero. This combined with the strong local coupling wave makes it very difficult to calculate IP tuning knobs which are orthogonal and closed. The usual approach results either in non-closure, not being orthogonal or the change in magnet strength being too big. To find a solution, the set of tuning quads had to be extended which resulted having more degrees of freedom than constraints. To find the optimal set of quadrupoles which creates a linear, orthogonal and closed knob and simultaneously minimizing the changes in magnet strength, the method using Singular Value Decomposition, Response Matrices and an Adapted Moore Penrose method had to be extended. The results of these simulations are discussed below and the results of first implementation in the machine are shown. C1 SLAC, Menlo Pk, CA 94025 USA. RP Wittmer, W (reprint author), SLAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1861 EP 1863 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302089 ER PT B AU Yan, YT Cai, YH Colocho, W Decker, FJ AF Yan, Yiton T. Cai, Yunhai Colocho, William Decker, Franz-Josef GP IEEE TI Validation of PEP-II resonantly excited turn-by-turn BPM data SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB For optics measurement and modeling of the PEP-II electron (HER) and position (LER) storage rings, we have been doing well with MIA [1] which requires analyzing turn-by-turn Beam Position Monitor (BPM) data that are resonantly excited at the horizontal, vertical, and longitudinal tunes. However, in anticipation that certain BPM buttons and even pins in the PEP-II IR region would be missing for the run starting in January 2007, we had been developing a data validation process to reduce the effect due to the reduced BPM data accuracy on PEP-II optics measurement and modeling. Besides the routine process for ranking BPM noise level through data correlation among BPMs with a singular-value decomposition (SVD), we could also check BPM data symplecticity by comparing the invariant ratios. Results from PEP-II measurement will be presented. C1 [Yan, Yiton T.; Cai, Yunhai; Colocho, William; Decker, Franz-Josef] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Yan, YT (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1864 EP 1866 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302090 ER PT B AU Bodenstein, RM Tiefenback, MG AF Bodenstein, R. M. Tiefenback, M. G. GP IEEE TI Multipass steering protocols at Jefferson lab SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The CEBAF recirculating accelerator consists of two CW superconducting RF linacs, through which an electron beam is accelerated for up to 5 passes. Focusing and steering elements affect each pass differently, requiring a multipass steering protocol to correct the orbits. Perturbations include lens misalignments (including long-term ground motion), BPM offsets, and focusing and steering from RF fields inside the cavities. A previous treatment of this problem assumed all perturbations were localized at the quadrupoles and the absence of x-y coupling. Having analyzed the problem and characterized the solutions, we developed an empirical iterative protocol to compare against previous results in the presence of skew fields and cross-plane coupling. We plan to characterize static and acceleration-dependent components of the beam line perturbations to allow systematic and rapid configuration of the accelerator at different linac energy gains. C1 [Bodenstein, R. M.; Tiefenback, M. G.] JLAB, Newport News, VA 24606 USA. RP Bodenstein, RM (reprint author), JLAB, Newport News, VA 24606 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1867 EP 1869 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302091 ER PT B AU Douglas, D Beard, K Eldred, J Evtushenko, P Jenkins, A Moore, W Osborne, L Sexton, D Tennant, C AF Douglas, D. Beard, K. Eldred, J. Evtushenko, P. Jenkins, A. Moore, W. Osborne, L. Sexton, D. Tennant, C. GP IEEE TI Simplified charged particle beam transport modeling using commonly available commercial software SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Particle beam modeling in accelerators has been the focus of considerable effort since the 1950s. Many generations of tools have resulted from this process, each leveraging both prior experience and increases in computer power. However, continuing innovation in accelerator technology results in systems that are not well described by existing tools, so the software development process is on-going. We discuss a novel response to this situation, which was encountered when Jefferson Lab began operation of its energy-recovering linacs. These machines were not readily described with legacy software; therefore a model was built using Microsoft Excel. This interactive simulation can query data from the accelerator, use it to compute machine parameters, analyze difference orbit data, and evaluate beam properties. It can also derive new accelerator tunings and rapidly evaluate the impact of changes in machine configuration. As it is spreadsheet-based, it can be easily user-modified in response to changing requirements. Examples for the JLab IR Upgrade FEL are presented. C1 [Douglas, D.; Beard, K.; Eldred, J.; Evtushenko, P.; Jenkins, A.; Moore, W.; Osborne, L.; Sexton, D.; Tennant, C.] Jefferson Lab, Newport News, VA 23606 USA. RP Douglas, D (reprint author), Jefferson Lab, Newport News, VA 23606 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1870 EP 1872 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302092 ER PT B AU Li, R AF Li, R. GP IEEE TI The effective CSR forces for an energy-chirped bunch under magnetic compression SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE C1 Jefferson Lab, Newport News, VA 23606 USA. RP Li, R (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1873 EP 1875 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302093 ER PT B AU Holmes, JA Plum, MA Wang, JG Zhang, Y Perkett, M AF Holmes, J. A. Plum, M. A. Wang, J. G. Zhang, Y. Perkett, M. GP IEEE TI Orbit injection dump simulations of the H-0 and H- beams SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Simulations of the transport of Ho and IF beams to the Spallation Neutron Source (SNS) ring injection dump are carried out using the ORBIT code. During commissioning and early operations, beam losses in this region have been the highest in the accelerator and have presented the most obvious hurdle to cross in achieving high intensity operation. Two tracking models are employed: 1) a piecewise continuous symplectic representation of the lattice elements in the injection chicane and dump line, and 2) particle tracking in full 3D magnetic fields, as obtained from OPERA code evaluations. The physics models also include estimations of scattering from both the primary and secondary stripper foils, and beam losses due to apertures throughout the beam line. C1 [Holmes, J. A.; Plum, M. A.; Wang, J. G.; Zhang, Y.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. [Perkett, M.] Denison Univ, Granville, OH 43023 USA. RP Holmes, JA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. FU Department of Energy [DE-AC05-00OR227] FX ORNL/SNS is managed by UT-Battelle, LLC, for the Department of Energy under contract: DE-AC05-00OR227. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1876 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302094 ER PT B AU Wang, JG AF Wang, J. G. GP IEEE TI 3D modeling of SNS ring injection dump beam line SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The SNS ring injection dump beam line has been suffering high beam losses since its commissioning. In order to understand the mechanisms of beam losses, we have built 3D simulation models consisting of three injection chicane dipoles and one injection dump septum magnet. 3D particle trajectories in the models are obtained. The study has clearly shown the design problems causing beam losses in the injection dump beam line. This paper reports our findings and proposed remedies. C1 Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA. RP Wang, JG (reprint author), Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1879 EP 1881 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302095 ER PT B AU Koeth, TW Fliller, RP Bellantoni, L Edwards, DA Edwards, HT AF Koeth, T. W. Fliller, R. P., III Bellantoni, L. Edwards, D. A. Edwards, H. T. GP IEEE TI A copper 3.9 GHz TM110 cavity for emittance exchange SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An experiment is being developed at the FNAL Photoinjector Lab to demonstrate the exchange of longitudinal emittance with a transverse horizontal emittance. The longitudinal electric field of a TM110 cavity vanishes on axis and increases linearly with transverse displacement. This "shearing" electric field is pivotal to the exchange. The design of this TM110 cavity is a variant of the Fermilab 3.9 GHz superconducting deflecting mode cavity; however, the cavity was constructed of OFHC copper. The authors report on the construction, field flatness, polarization and high power testing of a TM110 cavity. C1 [Koeth, T. W.] Rutgers State Univ, Piscataway, NJ 08854 USA. [Fliller, R. P., III; Bellantoni, L.; Edwards, D. A.; Edwards, H. T.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Koeth, TW (reprint author), Rutgers State Univ, Piscataway, NJ 08854 USA. FU Fermi Research Alliance LLC with U.S. DOE [DE-AC02-07CH11359] FX Work supported by Fermi Research Alliance LLC. Under DE-AC02- 07CH11359 with the U.S. DOE NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1882 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302096 ER PT B AU Chung, M Gilson, EP Davidson, RC Efthimion, P Majeski, R AF Chung, M. Gilson, E. P. Davidson, R. C. Efthimion, P. Majeski, R. GP IEEE TI Initial density profile measurements using a laser-induced fluorescence diagnostic in the Paul Trap Simulator Experiment SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Installation of a laser-induced fluorescence (LIF) diagnostic system has been completed and initial measurements of the beam density profile have been performed on the Paul Trap Simulator Experiment (PTSX). The PTSX device is a linear Paul trap that simulates the collective processes and nonlinear transverse dynamics of an intense charged particle beam propagating through a periodic focusing quadrupole magnetic configuration. Although there are several visible transition lines for the laser excitation of barium ions, the transition from the metastable state has been considered first, mainly because a stable, operating, broadband, and high-power laser system is available for experiments in this region of the red spectrum. The LIF system is composed of a dye laser, fiber optic cables, a line generator, which uses a Powell lens, collection optics, and a CCD camera system. Single-pass mode operation of the PTSX device is employed for the initial tests of the LIF system to make optimum use of the metastable ions. By minimizing the background light level, it is expected that adequate signal-to-noise ratio can be obtained to re-construct the radial density profile of the beam ions. C1 [Chung, M.; Gilson, E. P.; Davidson, R. C.; Efthimion, P.; Majeski, R.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Chung, M (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM mchung@princeton.edu NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1885 EP 1887 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302097 ER PT B AU Dorf, M Davidson, RC Startsev, E AF Dorf, Mikhail Davidson, Ronald C. Startsev, Edward GP IEEE TI Particle-in-cell simulations of halo particle production in intense charged particle beams propagating through a quadrupole focusing field with varying lattice amplitude SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The transverse compression and dynamics of intense charged particle beams, propagating through a periodic quadrupole lattice, play an important role in many accelerator physics applications. Typically, the compression can be achieved by means of increasing the focusing strength of the lattice along the beam propagation direction. However, beam propagation through the lattice transition region inevitably leads to a certain level of beam mismatch and halo formation. In this paper we present a detailed analysis of these phenomena using particle-in-cell (PIC) numerical simulations performed with the WARP code. A new definition of beam halo is proposed in this work that provides the opportunity to carry out a quantitative analysis of halo production by a beam mismatch. C1 [Dorf, Mikhail; Davidson, Ronald C.; Startsev, Edward] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Dorf, M (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1888 EP 1890 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302098 ER PT B AU Efthimion, PC Gilson, EP Davidson, RC Grisharn, L Logan, BG Seidl, PA Waldron, W AF Efthimion, Philip C. Gilson, Erik P. Davidson, Ronald C. Grisharn, Larry Logan, B. Grant Seidl, Peter A. Waldron, William GP IEEE TI Meter-long plasma source for heavy ion beam space charge neutralization SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID FERROELECTRIC PLASMA AB Plasmas are a source of unbound electrons for charge neutralizing intense heavy ion beams to allow them to focus to a small spot size and compress their axial pulse length. The plasma source should be able to operate at low neutral pressures and without strong externally-applied electric or magnetic fields. To produce one-meter-long plasma columns, sources based upon ferroelectric ceramics with large dielectric coefficients have been developed. The source utilizes the ferroelectric ceramic BaTiO3 to form metal plasma. The drift tube inner surface of the Neutralized Drift Compression Experiment (NDCX) is covered with ceramic material, and high voltage (similar to 8 kV) is applied between the drift tube and the front surface of the ceramics. A lead-zirconium-titanate prototype Ferroelectric; Plasma Source (FEPS), 20 cm in length, has produced plasma densities of 5 x 10(11) cm(-3). It was integrated into the Neutralized Transport Experiment (NTX), and successfully charge neutralized the K+ ion beam. A one-meter-long BaTiO3 source comprised of five 20-cm-long sources has been tested and characterized, producing relatively uniform plasma over the one-meter length of the source in the mid-10(10) cm(-3) density range. This source has been integrated into the NDCX device for charge neutralization and beam compression experiments. Initial beam compression experiments with this source yielded current compression ratios near 100. Future research will develop longer and higher plasma density sources to support beam compression experiments for high energy density physics applications. C1 [Efthimion, Philip C.; Gilson, Erik P.; Davidson, Ronald C.; Grisharn, Larry] Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. [Logan, B. Grant; Seidl, Peter A.; Waldron, William] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Efthimion, PC (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1891 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302099 ER PT B AU Pennington, JS Kaganovich, ID Sefkow, AB Startsev, EA Davidson, RC AF Pennington, J. S. Kaganovich, I. D. Sefkow, A. B. Startsev, E. A. Davidson, R. C. GP IEEE TI Charge and current neutralization of an ion beam pulse by background plasma in the presence of applied magnetic field SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID FUSION AB Plasma can be used as a convenient medium for manipulating intense charged particle beams, e.g., for ballistic focusing and steering, because the plasma can effectively reduce the self-space charge potential and self-magnetic field of the beam pulse. We previously developed a reduced analytical model of beam charge and current neutralization for an ion beam pulse propagating in a cold background plasma. The reduced-fluid description provides an important benchmark for numerical codes and yields useful scaling relations for different beam and plasma parameters. This model has been extended to include the additional effects of an applied solenoidal magnetic field. Simulations show that the self-magnetic field structure of the ion beam pulse propagating through background plasma can be complex and non-stationary. The linear system of Maxwell's equations for the self-electromagnetic fields can be solved analytically in Fourier space. For a strong enough applied magnetic field, poles emerge in Fourier space. These poles are an indication that whistler and low-hybrid waves can be excited by the beam pulse. C1 [Pennington, J. S.; Kaganovich, I. D.; Sefkow, A. B.; Startsev, E. A.; Davidson, R. C.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Pennington, JS (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM ikaganov@pppl.gov NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1894 EP 1896 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302100 ER PT B AU Shnidman, A Kaganovich, ID Davidson, RC AF Shnidman, Ariel Kaganovich, I. D. Davidson, R. C. GP IEEE TI Calculation of charge-changing cross sections of ions or atoms colliding with fast ions using the classical trajectory method SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID ELECTRON-CAPTURE; IONIZATION; COLLISIONS; HELIUM AB Evaluation of ion-atom charge-changing cross sections is needed for many accelerator applications. A classical trajectory Monte Carlo simulation has been used to calculate ionization and charge exchange cross sections. For benchmarking purposes, an extensive study has been performed, first for the simple case of hydrogen and helium targets in collisions with various ions. Despite the fact that the simulation only accounts for classical mechanics, the calculations are comparable to experimental results for projectile velocities in the region corresponding to the vicinity of the maximum cross section. C1 [Shnidman, Ariel; Kaganovich, I. D.; Davidson, R. C.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Shnidman, A (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM ikaganov@pppl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1897 EP 1899 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302101 ER PT B AU Qin, H Davidson, RC Startsev, EA AF Qin, Hong Davidson, Ronald C. Startsev, Edward A. GP IEEE TI Nonlinear delta f particle simulations of energy-anisotropy instabilities in high-intensity bunched beams SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The self-consistent Vlasov-Maxwell equations and a generalized delta f particle simulation algorithm are applied to high-intensity finite-length charge bunches. The nonlinear delta f method exhibits minimal noise and accuracy problems in comparison with standard particle-in-cell simulations. For bunched beams with anisotropic energy, there exists no exact kinetic equilibrium because the particle dynamics do not conserve transverse energy and longitudinal energy separately. A reference state in approximate dynamic equilibrium has been constructed theoretically. The electrostatic Harris instability driven by strong energy anisotropy relative to the reference state have been simulated using the generalized delta f algorithm for bunched beams. The observed growth rates are larger than those obtained for infinitely-long coasting beams. ne growth rate decreases for increasing bunch length to a value similar to the case of a long coasting beam. For long bunches, the instability is axially localized symmetrically relative to the beam center, and the characteristic wavelength in the longitudinal direction is comparable to the transverse dimension of the beam. C1 [Qin, Hong; Davidson, Ronald C.; Startsev, Edward A.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Qin, H (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1900 EP 1902 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302102 ER PT B AU Calaga, R Tomas, R Zimmermann, F AF Calaga, R. Tomas, R. Zimmermann, F. GP IEEE TI BPM calibration independent LHC optics correction SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The tight mechanical aperture for the LHC imposes severe constraints on both the beta and dispersion beating. Robust techniques to compensate these errors are critical for operation of high intensity beams in the LHC. We present simulations using realistic errors from magnet measurements and alignment tolerances in the presence of BPM noise. Correction reveals that the use of BPM calibration and model independent observables are key ingredients to accomplish optics correction. Experiments at RHIC to verify the algorithms for optics correction are also presented. C1 [Calaga, R.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Tomas, R.; Zimmermann, F.] CERN, Geneva, Switzerland. RP Calaga, R (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. FU US DOE FX This work was partly performed under the auspices of the US DOE NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1912 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302106 ER PT B AU Fedotov, AV Ben-Zvi, I Kayran, D Litvinenko, VN Pozdeyev, E Bell, G Bruhwiler, DL Sobol, A Sidorin, A Smirnov, A AF Fedotov, A. V. Ben-Zvi, I. Kayran, D. Litvinenko, V. N. Pozdeyev, E. Bell, G. Bruhwiler, D. L. Sobol, A. Sidorin, A. Smirnov, A. GP IEEE TI Electron cooling in the presence of undulator fields SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE ID SIMULATION AB The design of the higher-energy cooler for Relativistic Heavy Ion Collider (RHIC) recently adopted a non-magnetized approach which requires a low temperature electron beam [1]. However, to avoid significant loss of heavy ions due to recombination with electrons in the cooling section, the temperature of the electron beam should be high. These two contradictory requirements are satisfied in the design of the RHIC cooler with the help of the undulator fields. The model of the friction force in the presence of an undulator field was benchmarked vs direct numerical simulations with an excellent agreement. Here, we discuss cooling dynamics simulations with a helical undulator, including recombination suppression and resulting luminosities. C1 [Fedotov, A. V.; Ben-Zvi, I.; Kayran, D.; Litvinenko, V. N.; Pozdeyev, E.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Bell, G.; Bruhwiler, D. L.; Sobol, A.] TECH X Corp, Boulder, CO USA. [Sidorin, A.; Smirnov, A.] Joint Inst Nucl Res Dubna, Dubna, Russia. RP Fedotov, AV (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM fedotov@bnl.gov RI Kayran, Dmitry/E-1876-2013; Smirnov, Alexander/E-3709-2014 OI Kayran, Dmitry/0000-0002-1156-4384; FU U.S. DOE Office of Science, Office of Nuclear Physics [DE-FG02-04ER84094] FX Work supported by the U.S. DOE Office of Science, Office of Nuclear Physics, including grant #DE-FG02-04ER84094. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1915 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302107 ER PT B AU Fedotov, AV Ben-Zvi, I Kayran, D Pozdeyev, E Sidorin, A Smirnov, A AF Fedotov, A. V. Ben-Zvi, I. Kayran, D. Pozdeyev, E. Sidorin, A. Smirnov, A. GP IEEE TI High-energy electron cooling based on realistic six dimensional distribution of electrons SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The high-energy electron cooling system for RHIC-II is unique compared to standard coolers. It requires bunched electron beam. Electron bunches are produced by an Energy Recovery Linac (ERL), and cooling is planned without longitudinal magnetic field [1]. To address unique features of the RHIC cooler, a generalized treatment of cooling force was introduced in BETACOOL code [2] which allows us to calculate friction force for an arbitrary distribution of electrons. Simulations for RHIC cooler based on electron distribution from ERL are presented. C1 [Fedotov, A. V.; Ben-Zvi, I.; Kayran, D.; Pozdeyev, E.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Sidorin, A.; Smirnov, A.] Joint Inst Nucl Res Dubna, Dubna, Russia. RP Fedotov, AV (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM fedotov@bnl.gov RI Kayran, Dmitry/E-1876-2013; Smirnov, Alexander/E-3709-2014 OI Kayran, Dmitry/0000-0002-1156-4384; FU U.S. Department of Energy FX Work supported by the U.S. Department of Energy NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1918 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302108 ER PT B AU Fliller, RP Edwards, DA Edwards, HT Koeth, T Harkay, KC Kim, KJ AF Fliller, R. P., III Edwards, D. A. Edwards, H. T. Koeth, T. Harkay, K. C. Kim, K. -J. GP IEEE TI Transverse to longitudinal emittance exchange beamline at the A0 photoinjector SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB The FNAL A0 Photoinjector is being reconfigured to test the principal of transverse to longitudinal emittance exchange as proposed by Cornacchia and Emma, Kim and and Sessler, and others. The ability to perform such an exchange could have major advantages to FELs by reducing the transverse emittance. Several schemes to carry out the exchange are possible and will be reported separately. At the Fermilab A0 Photoinjector we are constructing a beamline to demonstrate this transverse to longitudinal emittance exchange. This beamline will consist of a dogleg, a TM110 5 cell copper cavity, and another dogleg. The beamline is designed to reuse the bunch compressor dipoles of the photoinjector, along with some existing diagnostics. Beamline layout and simulations are presented. Emittance dilution effects are also discussed. C1 [Fliller, R. P., III; Edwards, D. A.; Edwards, H. T.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Koeth, T.] Rutgers State Univ, Piscataway, NJ USA. [Harkay, K. C.; Kim, K. -J.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Fliller, RP (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM fliller@fnal.gov FU Fermi Research Alliance LLC; U.S. DOE [DE-AC02-07CH11359] FX Work supported by Fermi Research Alliance LLC. Under DE-AC02-07CH11359 with the U.S. DOE NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1921 EP + PG 2 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302109 ER PT B AU Hahn, H Hammons, L Naik, D AF Hahn, H. Hammons, L. Naik, D. GP IEEE TI Ferrite-lined HOM absorber for the e-cool ERL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB An R&D Energy Recovery Linac (ERL) intended as step towards electron-cooling of RHIC-II is being constructed at this laboratory. The center piece of the project is the experimental 5-cell 703.75 MHz superconducting "ECX" cavity. Successful operation will depend on effective HOM suppression, and it is planned to achieve HOM damping exclusively with room temperature ferrite absorbers. A ferrite-lined pillbox test model with dimensions reflecting the operational unit was assembled and attached to the 5-cell copper cavity. The cavity resonances of the lowest dipole and monopole modes and their damping due to the ferrite were determined. The effective ferrite properties in a form portable to other structures were obtained from network analyzer measurements of the ferrite absorber models and their interpretation with the simulation code Microwave Studio. C1 [Hahn, H.; Hammons, L.; Naik, D.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Hahn, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Hammons, Lee/D-6041-2013 OI Hammons, Lee/0000-0001-7066-8960 NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1924 EP 1926 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302110 ER PT B AU Kayran, D Ben-Zvi, I Calaga, R Chang, X Kewisch, J Litvinenko, VN Pozdeyev, E AF Kayran, D. Ben-Zvi, I. Calaga, R. Chang, X. Kewisch, J. Litvinenko, V. N. Pozdeyev, E. GP IEEE TI Optics of a two-pass ERL as an electron source for a non-magnetized RHIC-II electron cooler SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Non-magnetized electron cooling of RHIC requires an electron beam energy of 54.3 MeV, electron charge per bunch of 5 nC, normalized rms beam emittance of 4 mm-mrad, and rms energy spread of 4e-04 [1]. In this paper we describe a lattice of a two-pass SRF energy recovery linac (ERL) and results of a PARMELA simulation that provides electron beam parameters satisfying RHIC electron cooling requirements. C1 [Kayran, D.; Ben-Zvi, I.; Calaga, R.; Chang, X.; Kewisch, J.; Litvinenko, V. N.; Pozdeyev, E.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Kayran, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM dkayran@bnl.gov RI Kayran, Dmitry/E-1876-2013 OI Kayran, Dmitry/0000-0002-1156-4384 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1927 EP 1929 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302111 ER PT B AU Kayran, D Litvinenko, VN AF Kayran, Dmitry Litvinenko, Vladimir N. GP IEEE TI Merger system optimization in BNL's high current R&D ERL SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB A super-conducting RE R&D Energy recovery linac; (ERL) is under construction at Brookhaven National Laboratory (BNL). This ERL will be used as a test facility to study issues relevant to high-current, high-brightness beams. One of the goals is to demonstrate an electron beam with high charge per bunch (similar to 5 nC) and extremely low normalized emittance (similar to 5 mm-mrad) at an energy of 20 MeV. In contrast with operational high-brightness linear electron accelerators, all presently operating ERLs have order of magnitude larger emittances for the same charge per bunch. One reason for this emittance growth is that the merger system mixes transverse and longitudinal degrees of freedom, and consequently violates emittance compensation conditions. A merger system based on zigzag scheme [1] resolves this problem. In this paper we discuss performance of the present design of the BNL R&D ERL injector with a zigzag merger. C1 [Kayran, Dmitry; Litvinenko, Vladimir N.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Kayran, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM dkayran@bnl.gov RI Kayran, Dmitry/E-1876-2013 OI Kayran, Dmitry/0000-0002-1156-4384 NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1930 EP 1932 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302112 ER PT B AU Montag, C AF Montag, C. GP IEEE TI A low gamma(t) injection lattice for polarized protons in RHIC SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Polarized protons are injected into the Relativistic Heavy Ion Collider (RHIC) just above transition energy. When installation of a cold partial Siberian snake in the AGS required lowering the injection energy by Delta(gamma) = 0.56, the transition energy in RHIC had to be lowered accordingly to ensure proper longitudinal matching. This paper presents lattice modifications implemented to lower the transition energy by Delta(gamma t) = 0.8. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Montag, C (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1933 EP 1935 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302113 ER PT B AU Pozdeyev, E Ben-Zvi, I Fedotov, A Kayran, D Litvinenko, V Wang, G AF Pozdeyev, E. Ben-Zvi, I. Fedotov, A. Kayran, D. Litvinenko, V. Wang, G. GP IEEE TI Collective effects in the RHIC-II electron cooler SO 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 SE IEEE Particle Accelerator Conference LA English DT Proceedings Paper CT IEEE Particle Accelerator Conference CY JUN 25-29, 2007 CL Albuquerque, NM SP IEEE AB Electron cooling at RHIC-II upgrade imposes strict requirements on the quality of the electron beam at the cooling section. Beam current dependent effects such as the space charge, wake fields, CSR in bending magnets, trapped ions, etc., will tend to spoil the beam quality and decrease the cooling efficiency. In this paper, we estimate the defocusing effect of the space charge at the cooling section and describe our plan to compensate the defocusing space charge force by focusing solenoids. We also estimate the energy and emittance growth cased by wake fields. Finally, we discuss ion trapping in the electron cooler and consider different techniques to minimize the effect of ion trapping. C1 [Pozdeyev, E.; Ben-Zvi, I.; Fedotov, A.; Kayran, D.; Litvinenko, V.; Wang, G.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Pozdeyev, E (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM pozdeyev@bnl.gov RI Kayran, Dmitry/E-1876-2013 OI Kayran, Dmitry/0000-0002-1156-4384 NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4244-0916-7 J9 IEEE PART ACC CONF PY 2007 BP 1936 EP 1938 PG 3 WC Engineering, Electrical & Electronic; Physics, Particles & Fields SC Engineering; Physics GA BHP10 UT WOS:000255096302114 ER EF