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

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Design and prototype tests of a large-aperture 37-53 MHz ferrite-tuned booster synchrotron cavity 37-53 MHz大孔径铁氧体调谐助推同步加速器腔的设计与样机试验
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.986506
M. Champion, T. Berenc, M. May, J. Reid
{"title":"Design and prototype tests of a large-aperture 37-53 MHz ferrite-tuned booster synchrotron cavity","authors":"M. Champion, T. Berenc, M. May, J. Reid","doi":"10.1109/PAC.2001.986506","DOIUrl":"https://doi.org/10.1109/PAC.2001.986506","url":null,"abstract":"The Booster synchrotron at Fermilab employs eighteen 37-53 MHz ferrite-tuned double-gap coaxial radiofrequency cavities for acceleration of protons from 400 MeV to 8 GeV. The cavities have an aperture of 2.25 inches and operate at 55 kV per cavity. Future high duty factor operation of the Booster will be problematic due to unavoidable beam loss at the cavities resulting in excessive activation. The power amplifiers, high maintenance items, are mounted directly to the cavities in the tunnel. A proposed replacement for the Booster, the Proton Driver, will utilize the Booster radiofrequency cavities and requires not only a larger aperture, but also higher voltage. A research and development program is underway at Fermilab to modify the Booster cavities to provide a 5-inch aperture and a 20% voltage increase. A prototype has been constructed and high power tests have been completed. The cavity design and test results are presented.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"182 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":"122254158","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
Field quality of the Fermilab Nb/sub 3/Sn high field dipole model 费米实验室Nb/sub 3/Sn高场偶极子模型的场质量
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-12 DOI: 10.1109/PAC.2001.988130
N. Andreev, D. Chichili, C. Christensen, J. DiMarco, V. Kashikhin, P. Schlabach, C. Sylvester, I. Terechkine, J. Tompkins, G. Velev, A. Zlobin
{"title":"Field quality of the Fermilab Nb/sub 3/Sn high field dipole model","authors":"N. Andreev, D. Chichili, C. Christensen, J. DiMarco, V. Kashikhin, P. Schlabach, C. Sylvester, I. Terechkine, J. Tompkins, G. Velev, A. Zlobin","doi":"10.1109/PAC.2001.988130","DOIUrl":"https://doi.org/10.1109/PAC.2001.988130","url":null,"abstract":"A short Nb/sub 3/Sn dipole model based on a single-bore cos-theta coil with a cold iron yoke has been fabricated and tested at Fermilab. Field quality was measured at room temperature during magnet fabrication and at liquid helium temperature. This paper reports the results of magnetic measurements. The geometrical harmonics, coil magnetization effects caused by persistent currents in the superconductor, eddy currents in the cable, and the \"snapback\" effect at injection are presented and compared with theoretical predictions.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"51 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":"130323014","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
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
Strategy for achieving true sub-micron orbit stabilization at the Advanced Photon Source 在先进光子源上实现真正亚微米轨道稳定的策略
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-10 DOI: 10.1109/PAC.2001.987522
G. Decker, O. Singh
{"title":"Strategy for achieving true sub-micron orbit stabilization at the Advanced Photon Source","authors":"G. Decker, O. Singh","doi":"10.1109/PAC.2001.987522","DOIUrl":"https://doi.org/10.1109/PAC.2001.987522","url":null,"abstract":"The Advanced Photon Source was commissioned in March 1995 to provide high-brightness ultrastable X-ray photon beams to its user community. The original beam stability specifications were that the source points not move more than 4.5 microns RMS vertically and 17 microns RMS horizontally. Reductions in coupling, together with planned reductions in emittance and increasing beamline user sophistication, are pushing the envelope of presently achievable beam stabilization methods. While beam stability below the 2-micron RMS level is achieved routinely in the band from 0.016 Hz to 30 Hz in both the vertical and horizontal planes, much remains to be done to reduce this level below 1 micron RMS. An additional challenge is to maintain the beam stability for longer time periods, i.e., days to weeks. This paper discusses progress to date on these issues and suggests methodologies for further improvements.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127503043","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
Analysis of coherent optical transition radiation interference patterns produced by SASE-induced microbunches sase诱导微束产生的相干光跃迁辐射干涉图分析
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-09 DOI: 10.1109/PAC.2001.986656
D. Rule, A. Lumpkin
{"title":"Analysis of coherent optical transition radiation interference patterns produced by SASE-induced microbunches","authors":"D. Rule, A. Lumpkin","doi":"10.1109/PAC.2001.986656","DOIUrl":"https://doi.org/10.1109/PAC.2001.986656","url":null,"abstract":"We present an analysis of data published recently on coherent optical transition radiation interferometry (COTRI) angular distributions made on the Argonne experiment on microbunching. These COTRI distributions exhibited some intriguing characteristics: highly enhanced lobe patterns in the /spl plusmn//spl theta//sub y/ direction, instead of circularly symmetric fringes; and asymmetries in intensities in +/spl theta//sub y/ vs. -/spl theta//sub y/ in some cases. We have done calculations that produce patterns consistent with those observed. The role of the microbunch's elliptical transverse beam profile in accounting for the /spl theta//sub x/-/spl theta//sub y/ asymmetry is illustrated. Similarly, a beam profile with a /spl plusmn/y asymmetry gives a lobe asymmetry in +/spl theta//sub y/ vs. -/spl theta//sub y/. The interplay of the interference fringe pattern and the microbunch's transverse form factor accounts for the angular positions of the lobes. The fringe visibility was calculated by convolving the beam divergence distribution with the COTRI pattern. Thus, we have shown that COTRI angular patterns can be used to characterize the effective transverse size, microbunch length, divergence, and the bunching fraction.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"460 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162641","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
The high-power s-band feed subsystem for the Advanced Photon Source injector test stand 先进光子源喷射器试验台的大功率s波段馈电子系统
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Pub Date : 2001-07-09 DOI: 10.1109/PAC.2001.986691
A. Grelick, S. Berg, G. Goeppner, J. Lewellen, S. Milton, A. Nassiri, G. Pile, T. Smith
{"title":"The high-power s-band feed subsystem for the Advanced Photon Source injector test stand","authors":"A. Grelick, S. Berg, G. Goeppner, J. Lewellen, S. Milton, A. Nassiri, G. Pile, T. Smith","doi":"10.1109/PAC.2001.986691","DOIUrl":"https://doi.org/10.1109/PAC.2001.986691","url":null,"abstract":"The RF subsystem for the Advanced Photon Source injector test stand is a totally passive system. The waveguide variable power dividers and phase shifters, which are pressurized with SF/sub 6/, are used to provide three high-power ports that are independently adjustable in phase and amplitude while maintaining negligible differential phase jitter. Either three independent devices or a device requiring three inputs can be tested at any one time.","PeriodicalId":313758,"journal":{"name":"PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130011603","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
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