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PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)最新文献

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Architecture of a software quench management system 软件淬火管理系统的体系结构
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-30 DOI: 10.1109/PAC.2001.988144
J. Nogiec, E. Desavouret, M. Lamm, D. Orris, S. Sim
{"title":"Architecture of a software quench management system","authors":"J. Nogiec, E. Desavouret, M. Lamm, D. Orris, S. Sim","doi":"10.1109/PAC.2001.988144","DOIUrl":"https://doi.org/10.1109/PAC.2001.988144","url":null,"abstract":"Testing superconducting accelerator magnets is inherently coupled with the proper handling of quenches; i.e., protecting the magnet and characterizing the quench process. Therefore, software implementations must include elements of both data acquisition and real-time controls. The architecture of the quench management software developed at Fermilab's Magnet Test Facility is described. This system consists of quench detection, quench protection, and quench characterization components that execute concurrently in a distributed system. Collaboration between the elements of quench detection, quench characterization and current control are discussed, together with a schema of distributed saving of various quench-related data. Solutions to synchronization and reliability in such a distributed quench system are also presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129069338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Single-layer high field dipole magnets 单层高场偶极磁体
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-30 DOI: 10.1109/PAC.2001.988129
V. Kashikhin, A. Zlobin
{"title":"Single-layer high field dipole magnets","authors":"V. Kashikhin, A. Zlobin","doi":"10.1109/PAC.2001.988129","DOIUrl":"https://doi.org/10.1109/PAC.2001.988129","url":null,"abstract":"Fermilab is developing high field dipole magnets for post-LHC hadron colliders. Several designs with a nominal field of 10-12 T, coil bore size of 40-50 mm based on both shell-type and block-type coil geometry are currently under consideration. This paper presents a new approach to magnet design, based on simple and robust single-layer coils optimized for the maximum field, good field quality and minimum number of turns.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121776314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Nb/sub 3/Sn arc quadrupole magnets for VLHC VLHC用Nb/sub /Sn弧四极磁体
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-30 DOI: 10.1109/PAC.2001.988128
V. Kashikhin, A. Zlobin
{"title":"Nb/sub 3/Sn arc quadrupole magnets for VLHC","authors":"V. Kashikhin, A. Zlobin","doi":"10.1109/PAC.2001.988128","DOIUrl":"https://doi.org/10.1109/PAC.2001.988128","url":null,"abstract":"Superconducting quadrupoles with a field gradient of 400-450 T/m for a future Very Large Hadron Collider (VLHC) are being studied at Fermilab. To reach the target field gradient in a 40-50 mm aperture, Nb/sub 3/Sn superconductor is used at an operating temperature of 4.2 K. Two cases with different magnet functions, beam separation distances and coil arrangements have been analyzed and optimized in order to provide the required field quality and magnet parameters.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"750 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122968863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Design and development of Nb/sub 3/Sn single-layer common coil dipole magnet for VLHC VLHC用Nb/sub /Sn单层共线圈偶极磁体的设计与研制
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-30 DOI: 10.1109/PAC.2001.988127
G. Ambrosio, N. Andreev, E. Barzi, P. Bauer, D. Chichili, K. Ewald, S. Feher, L. Imbasciati, V. Kashikhin, S.W. Kim, P. Limon, I. Novitski, J. Rey, S. Yadav, R. Yamada, A. Zlobin, R. Scanlan
{"title":"Design and development of Nb/sub 3/Sn single-layer common coil dipole magnet for VLHC","authors":"G. Ambrosio, N. Andreev, E. Barzi, P. Bauer, D. Chichili, K. Ewald, S. Feher, L. Imbasciati, V. Kashikhin, S.W. Kim, P. Limon, I. Novitski, J. Rey, S. Yadav, R. Yamada, A. Zlobin, R. Scanlan","doi":"10.1109/PAC.2001.988127","DOIUrl":"https://doi.org/10.1109/PAC.2001.988127","url":null,"abstract":"Common coil dipole magnets based on Nb/sub 3/Sn conductor and the react-and-wind technology are a promising option for the next generation of hadron colliders. The react-and-wind technology has potential cost benefits related to less expensive cable insulation, structural materials and magnet fabrication. A common coil design allows the use of a pre-reacted Nb/sub 3/Sn superconductor with low critical current degradation after bending. Fermilab in collaboration with LBNL is involved in the development of a single-layer common-coil dipole magnet with a maximum field of 11 T and 40-50 mm aperture for a future VLHC. This paper reports the current magnetic and mechanical designs of the dipole model, the magnet parameters and the status of the program.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114434936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Quench protection of high field Nb/sub 3/Sn magnets for VLHC VLHC高场Nb/sub /Sn磁体的淬火保护
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-30 DOI: 10.1109/PAC.2001.988142
L. Imbasciati, P. Bauer, G. Ambrosio, V. Kashikin, M. Lamm, A. Zlobin
{"title":"Quench protection of high field Nb/sub 3/Sn magnets for VLHC","authors":"L. Imbasciati, P. Bauer, G. Ambrosio, V. Kashikin, M. Lamm, A. Zlobin","doi":"10.1109/PAC.2001.988142","DOIUrl":"https://doi.org/10.1109/PAC.2001.988142","url":null,"abstract":"Fermilab is developing high field magnets for a possible future VLHC. The high levels of stored energy in these magnets present significant challenges to the magnet quench protection. Simulation programs have been developed and used to analyze temperature and voltage distributions during a quench and to performed parametric studies on conductor and quench-heater requirements. This paper concludes with a proposal for a set of quench protection parameters for the VLHC magnets.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129768806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Radio-isotope production using laser wakefield accelerators 利用激光尾流场加速器生产放射性同位素
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-27 DOI: 10.1109/PAC.2001.987450
W. Leemans, D. Rodgers, P. Catravas, C. Geddes, G. Fubiani, C. Tóth, E. Esarey, B. Shadwick, R. Donahue, A. Smith, A. Reitsma
{"title":"Radio-isotope production using laser wakefield accelerators","authors":"W. Leemans, D. Rodgers, P. Catravas, C. Geddes, G. Fubiani, C. Tóth, E. Esarey, B. Shadwick, R. Donahue, A. Smith, A. Reitsma","doi":"10.1109/PAC.2001.987450","DOIUrl":"https://doi.org/10.1109/PAC.2001.987450","url":null,"abstract":"A 10 Hz, 10 TW solid state laser system has been used to produce electron beams suitable for radio-isotope production. The laser beam was focused using a 30 cm focal length f/6 off-axis parabola on a gas plume produced by a high pressure pulsed gas jet. Electrons were trapped and accelerated by high gradient wakefields. excited in the ionized gas through the self-modulated laser wakefield instability. The electron beam was measured to contain in excess of 5 nC/bunch. A composite Pb/Cu target was used to convert the electron beam into /spl gamma/-rays which subsequently produced radio-isotopes through (/spl gamma/,n) reactions. Isotope identification through /spl gamma/-ray spectroscopy and half-life time measurements demonstrated that /sup 61/Cu was produced which indicates that 20-25 MeV /spl gamma/-rays were produced, and hence electrons with energies greater than 25-30 MeV. The production of high energy electrons was independently confirmed using a bending magnet spectrometer. The measured spectra had an exponential distribution with a 3 MeV width. The amount of activation was on the order of 2.5 /spl mu/Ci after 3 hours of operation at 1 Hz. Future experiments will aim at increasing this yield by post-accelerating the electron beam using a channel guided laser wakefield accelerator.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127200983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
LIBXSIF: a standalone library for parsing the Standard Input Format LIBXSIF:用于解析标准输入格式的独立库
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-27 DOI: 10.1109/PAC.2001.988015
P. Tenenbaum
{"title":"LIBXSIF: a standalone library for parsing the Standard Input Format","authors":"P. Tenenbaum","doi":"10.1109/PAC.2001.988015","DOIUrl":"https://doi.org/10.1109/PAC.2001.988015","url":null,"abstract":"The Standard Input Format for the description of accelerator beamlines has achieved limited acceptance due to the complexity of the parser required. We describe a standalone library of Fortran-90 routines which can be used to parse a superset of the Standard Input format in use at SLAC, named Extended Standard Input Format (XSIF). This library provides authors of new simulation codes with a simple means of adding XSIF compatibility to their programs, and also permits users to add their own features to the parser with relative ease. As examples we describe the manner in which the linear accelerator code LIAR was modified to use LIBXSIF, and changes made to DIMAD to switch from its internal Standard Input Format parser to use of the external XSIF parser. URLs for the source code, documentation, and ready-to-use libraries are provided.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129013804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Sources of beam halo in the Next Linear Collider main linac 在下一个直线对撞机主直线中光束光晕的来源
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-27 DOI: 10.1109/PAC.2001.988272
P. Tenenbaum, T. Raubenheimer, M. Woodley
{"title":"Sources of beam halo in the Next Linear Collider main linac","authors":"P. Tenenbaum, T. Raubenheimer, M. Woodley","doi":"10.1109/PAC.2001.988272","DOIUrl":"https://doi.org/10.1109/PAC.2001.988272","url":null,"abstract":"One of the factors that limited the performance of the Stanford Linear Collider (SLC) was the number of particles per bunch with large betatron or energy amplitudes. We consider the equivalent problem for the Next Linear Collider (NLC) main X-band linacs. We evaluate the number of large-amplitude particles which can be expected due to scattering processes, wakefields, and magnet nonlinearities. We conclude that the number of particles in the beam halo from these sources can easily be accomodated by the planned post-linac collimation system.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116098689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Developments in beam-based alignment and steering of the Next Linear Collider main linac 下一代直线对撞机主直线机基于光束对准和转向的发展
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-27 DOI: 10.1109/PAC.2001.988270
P. Tenenbaum, L. Endrickson, T. Raubenheimer
{"title":"Developments in beam-based alignment and steering of the Next Linear Collider main linac","authors":"P. Tenenbaum, L. Endrickson, T. Raubenheimer","doi":"10.1109/PAC.2001.988270","DOIUrl":"https://doi.org/10.1109/PAC.2001.988270","url":null,"abstract":"The Next Linear Collider main linacs are 13 km linear accelerators which each contain approximately 750 hybrid iron/permanent-magnet quadrupoles in a FODO array. The small amount of vertical emittance dilution permitted in the main linacs implies a tight tolerance on the RMS distance between the beam and the centers of the quads. We describe two methods for measuring the offsets between the quads and their integrated beam position monitors, and three algorithms for steering the main linac to minimize the emittance dilution. Simulation studies of the alignment and steering algorithms are presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122672515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Transverse wakefields from tapered collimators: measurements and analysis 锥形准直器的横向尾流场:测量和分析
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-27 DOI: 10.1109/PAC.2001.987530
P. Tenenbaum, K. Bane, L. Eriksson, R. Jobe, D. McCormick, C. Ng, T. Taubenheimer, M. Ross, G. Stupakov, D. Walz, D. Onoprienko
{"title":"Transverse wakefields from tapered collimators: measurements and analysis","authors":"P. Tenenbaum, K. Bane, L. Eriksson, R. Jobe, D. McCormick, C. Ng, T. Taubenheimer, M. Ross, G. Stupakov, D. Walz, D. Onoprienko","doi":"10.1109/PAC.2001.987530","DOIUrl":"https://doi.org/10.1109/PAC.2001.987530","url":null,"abstract":"We report on a series of measurements of the transverse wakefield from tapered collimators. The collimators were designed to principally present a geometric impedance to the beam, and to minimize impedances from resistivity or surface features; in addition, the geometries of the collimators were selected to permit examination of the scaling behavior of the wakefield due to collimator taper angle and minimum gap size. We present the measured near-center wakefields of the collimators, as well as the effect of bunch-length variation. The measurements are compared to analytic models and MAFIA simulations.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117237849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
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