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

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Radiation shielding of the Fermilab 16 GeV proton driver 费米实验室16gev质子驱动器的辐射屏蔽
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.987837
N. Mokhov, A. Drozhdin, O. Krivosheev
{"title":"Radiation shielding of the Fermilab 16 GeV proton driver","authors":"N. Mokhov, A. Drozhdin, O. Krivosheev","doi":"10.1109/PAC.2001.987837","DOIUrl":"https://doi.org/10.1109/PAC.2001.987837","url":null,"abstract":"The radiation transport analysis in the proposed Fermilab 1.2 MW Proton Driver (PD) is fundamentally important because of the impact on machine performance, conventional facility design, maintenance operations, and related costs. The strategy adopted in the PD design is that the beam losses in the machine are localized and controlled as much as possible via the dedicated beam collimation system, with a high loss rate localized in that section and drastically lower uncontrolled beam loss rate in the rest of the lattice. Results of thorough Monte Carlo calculations of prompt and residual radiation in and around the PD components are presented for realistic assumptions and geometry under normal operation and accidental conditions. This allowed one to conduct shielding design and analysis to meet regulatory requirements for external shielding, hands on maintenance and ground-water activation.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117133614","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
Narrowband beam loading compensation in the Fermilab Main Injector accelerating cavities 费米实验室主注入器加速腔中的窄带束流加载补偿
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.986508
J. Dey, J. Steimel, J. Reid
{"title":"Narrowband beam loading compensation in the Fermilab Main Injector accelerating cavities","authors":"J. Dey, J. Steimel, J. Reid","doi":"10.1109/PAC.2001.986508","DOIUrl":"https://doi.org/10.1109/PAC.2001.986508","url":null,"abstract":"A narrowband beam loading compensation system was installed for the Main Injector accelerating cavities. This feedback operates solely on the fundamental resonant mode of the cavity. This paper describes modifications to the high level radiofrequency system required to make the system operational. These modifications decreased the effect of steady-state beam loading by a factor of 10 and improved the reliability of paraphasing for coalescing.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126825654","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: 7
Beam-beam compensation in Tevatron: status report Tevatron中的束流补偿:现状报告
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.987457
V. Shiltsev, G. Kuznetsov, N. Solyak, D. Wildman, X.L. Zhang, Y. Alexahin, K. Bishofberger
{"title":"Beam-beam compensation in Tevatron: status report","authors":"V. Shiltsev, G. Kuznetsov, N. Solyak, D. Wildman, X.L. Zhang, Y. Alexahin, K. Bishofberger","doi":"10.1109/PAC.2001.987457","DOIUrl":"https://doi.org/10.1109/PAC.2001.987457","url":null,"abstract":"The project of beam-beam compensation (BBC) in the Tevatron using electron beams has passed a successful first step in experimental studies. The first Tevatron electron lens (TEL) has been installed in the Tevatron, commissioned, and demonstrated the theoretically predicted shift of betatron frequencies of a high energy proton beam due to a high current low energy electron beam. After the first series of studies in March-April 2001 (total of 7 shifts), we achieved tuneshifts of 980 GeV protons of about dQ=+0.007 with some 3 A of the electron beam current while the proton lifetime was in the range of 10 hours (some 24 hours at the best). Future work will include diagnostics improvement, beam studies with antiprotons, and fabrication of the 2nd TEL.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126799395","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: 3
Challenges to the Fermilab linac and Booster accelerators 费米实验室直线加速器和助推器加速器的挑战
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.987838
R. Webber
{"title":"Challenges to the Fermilab linac and Booster accelerators","authors":"R. Webber","doi":"10.1109/PAC.2001.987838","DOIUrl":"https://doi.org/10.1109/PAC.2001.987838","url":null,"abstract":"A report on the challenges confronting the Fermilab Linac and Booster accelerators is presented. Plans to face those challenges are discussed. Historically, the Linac/Booster system has served only as an injector for the relatively low repetition rate Main Ring synchrotron. With construction of an 8 GeV target station for the 5 Hz MiniBooNE neutrino beam and requirements for rapid multi-batch injection into the Main Injector for the NUMI/MINOS experiment, the demand for 8 GeV protons will increase more than an order of magnitude above recent high levels. To meet this challenge, enhanced ion source performance, better Booster orbit control, a beam loss collimation/localization system, and improved diagnostics are among the items being pursued. Booster beam loss reduction and control are key to the entire near future Fermilab high energy physics program.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128885142","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
BTeV low-beta optics in the Tevatron Tevatron中的BTeV低光学
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.988037
J. Johnstone
{"title":"BTeV low-beta optics in the Tevatron","authors":"J. Johnstone","doi":"10.1109/PAC.2001.988037","DOIUrl":"https://doi.org/10.1109/PAC.2001.988037","url":null,"abstract":"A low-/spl beta/ insertion has been designed for the BTeV experiment to be installed in the Tevatron C0 straight section. With /spl plusmn/12 m for detector space, a /spl beta/* of 0.5 m can be achieved using 170 T/m magnets in the final focus triplets. A half-crossing angle of 240 /spl mu/r keeps the beams separated by 5/spl sigma/ at the 2nd parasitic crossing; 39.5 m from the IP. There are two possible low-/spl beta/ Tevatron collider operating modes: CDF & D0 with collisions, but not C0, and; C0 with collisions, but not B0 or D0.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121010197","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: 0
Application of scaling properties of the Vlasov and Fokker-Planck equations to improved macroparticle models Vlasov和Fokker-Planck方程标度特性在改进宏观粒子模型中的应用
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.988044
J. Maclachlan
{"title":"Application of scaling properties of the Vlasov and Fokker-Planck equations to improved macroparticle models","authors":"J. Maclachlan","doi":"10.1109/PAC.2001.988044","DOIUrl":"https://doi.org/10.1109/PAC.2001.988044","url":null,"abstract":"There are two important partial differential equations (PDE's) which describe the evolution of phase space density distributions (denoted /spl psi/) for beams in cyclic accelerators and storage rings. The Vlasov equation applies when the forces are derivable from a potential.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124139942","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: 0
Tevatron electron lens magnetic system 电子透镜磁系统
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.988201
A. Ageev, I. Bogdanov, R. Hively, S. Kozub, G. Kuznetsov, E. Kashtanov, A. Martínez, V. Pleskach, H. Pfeffer, A. Sery, V. Shiltsev, V. Sytnik, L. Tkachenko, D. Wolff, S. Zintchenko, V. Zubko
{"title":"Tevatron electron lens magnetic system","authors":"A. Ageev, I. Bogdanov, R. Hively, S. Kozub, G. Kuznetsov, E. Kashtanov, A. Martínez, V. Pleskach, H. Pfeffer, A. Sery, V. Shiltsev, V. Sytnik, L. Tkachenko, D. Wolff, S. Zintchenko, V. Zubko","doi":"10.1109/PAC.2001.988201","DOIUrl":"https://doi.org/10.1109/PAC.2001.988201","url":null,"abstract":"In the framework of collaboration between IHEP and FNAL, a magnetic system of the Tevatron Electron Lens (TEL) has been designed and built. The TEL is currently installed in the superconducting ring of the Tevatron proton-antiproton collider and used for experimental studies of beam-beam compensation.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"284 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123725928","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
RF parameter curves for a proton driver synchrotron 质子驱动同步加速器的射频参数曲线
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.987918
J. Maclachlan, Z. Qian, J. Griffin
{"title":"RF parameter curves for a proton driver synchrotron","authors":"J. Maclachlan, Z. Qian, J. Griffin","doi":"10.1109/PAC.2001.987918","DOIUrl":"https://doi.org/10.1109/PAC.2001.987918","url":null,"abstract":"This paper discusses the choices of rf system parameters made in the design study. The limited number of existing Booster cavities has led to consideration for stage 1 of an inductive insert in the ring to aid initial beam capture by compensating longitudinal space charge, an admittedly speculative expedient requiring followup with further calculation and some beam experiments. This report is one of nineteen papers at this conference by members of the Proton Driver design team; it relies on these others to help establish the general context.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134626444","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: 0
Computational investigation of dissipation and reversibility of space-charge driven processes in beams 光束中空间电荷驱动过程的耗散和可逆性的计算研究
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.987456
R. Kishek, C. Bohn, I. Haber, P. O'Shea, M. Reiser, H. Kandrup
{"title":"Computational investigation of dissipation and reversibility of space-charge driven processes in beams","authors":"R. Kishek, C. Bohn, I. Haber, P. O'Shea, M. Reiser, H. Kandrup","doi":"10.1109/PAC.2001.987456","DOIUrl":"https://doi.org/10.1109/PAC.2001.987456","url":null,"abstract":"Collisionless charged particle beams are presumed to equilibrate via the long-range potential from the space charge. The exact mechanism for this equilibration, along with the question of macroscopic reversibility, has been uncertain, however. A number of computational approaches based on particle-in-cell (PIC) methods are presented which can facilitate the resolution of these questions. One such technique is the self-consistent tracking of individual particle orbits through the nonlinear potential formed by nonuniform charge density distributions. This orbit-tracking model differs from the particle-core model in that the sampled particles are systematically chosen from the actual particles in a fully self-consistent simulation. The results of this analysis are presented for a number of representative cases, and the implications of the study on the equilibration mechanism are discussed.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128476361","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
Argonne Wakefield Accelerator facility upgrade 阿贡韦克菲尔德加速器设施升级
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-11 DOI: 10.1109/PAC.2001.988310
M. Conde, W. Gai, R. Konecny, J. Power, P. Schoessow, X. Sun
{"title":"Argonne Wakefield Accelerator facility upgrade","authors":"M. Conde, W. Gai, R. Konecny, J. Power, P. Schoessow, X. Sun","doi":"10.1109/PAC.2001.988310","DOIUrl":"https://doi.org/10.1109/PAC.2001.988310","url":null,"abstract":"The Argonne Wakefield Accelerator has been successfully used for conducting wakefield experiments in dielectric loaded structures and plasmas. Although the initial wakefield experiments were successful, higher drive beam quality would substantially improve the wakefield accelerating gradients. For this reason we have built a new 1-1/2 cell L-band photocathode RF gun. This gun is expected to produce 10 - 100 nC bunches with 2 - 5 ps rms pulse length and normalized emittance less than 100 mm mrad. The gun will initially have a Cu photocathode, which will soon be replaced by a high quantum efficiency CsTe one, allowing the generation of a train of high charge bunches. The beam energy at the exit of the gun cavity will be in the range 7.5 - 10 MeV. A standing-wave linac structure operating at the same frequency (1.3 GHz) will increase the beam energy to about 15 MeV. This beam will be used in high gradient wakefield acceleration experiments and other high intensity electron beam applications. Travelling wave dielectric loaded structures, operating at 7.8 and 15.6 GHz, will be excited by the propagation of single bunches or by trains of up to 32 electron bunches, reaching gradients in excess of 100 MV/m over distances of the order of 1 meter.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127984368","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
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