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Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)最新文献

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Design of a /spl gamma//sub t/-jump system for Fermilab Main Injector 费米实验室主喷射器a/ spl γ //sub - t/跳变系统设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749906
W. Chou, B. Brown, S. Fang, J. Leibfritz, K. Ng, H. Pfeffer, I. Terechkine
{"title":"Design of a /spl gamma//sub t/-jump system for Fermilab Main Injector","authors":"W. Chou, B. Brown, S. Fang, J. Leibfritz, K. Ng, H. Pfeffer, I. Terechkine","doi":"10.1109/PAC.1997.749906","DOIUrl":"https://doi.org/10.1109/PAC.1997.749906","url":null,"abstract":"In order to control the beam emittance and reduce the particle losses during the transition crossing at high intensity, a conceptual design of a /spl gamma/t-jump system for the FNAL Main Injector is presented. It is a first-order system employing local dispersion inserts at existing dispersion free straight sections. The goal is to provide a jump of /spl Delta//spl gamma//sub t/ from +1 to -1 within 0.5 ms. The system consists of 8 sets of pulsed quadrupole triplets. These quads have pole tips of hyperbolic shape and thin laminations. The power supply uses a GTO as the fast switch and a resonant circuit with a 1 kHz resonant frequency. The elliptical beam tube is made of Inconel 718, which has high electrical resistivity and high strength. Details of the lattice layout and subsystems design are presented.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129645938","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
Experiments in heavy ion fusion beam physics at LBNL, LLNL, and the University of Maryland 在LBNL、LLNL和马里兰大学进行重离子聚变束物理实验
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749985
J. Kwan
{"title":"Experiments in heavy ion fusion beam physics at LBNL, LLNL, and the University of Maryland","authors":"J. Kwan","doi":"10.1109/PAC.1997.749985","DOIUrl":"https://doi.org/10.1109/PAC.1997.749985","url":null,"abstract":"A heavy ion fusion driver must be capable of accelerating an intense ion beam to GeV beam energies. The final beam pulse current can be as high as a few kA using beam compression in an induction linac. Combining beamlets at low energy may prove to be economical as long as there is no significant emittance growth. Focusing of the final beam pulse from the reactor chamber wall to the target can be enhanced by using a plasma channel to guide the ion beam. Experiments at LBNL on ion sources, injector, the combiner and plasma channel focusing are discussed. One possible way to reduce the cost of a driver is to use an induction recirculator. Experiments at LLNL are exploring this concept by studying the transport and bending of space-charge-dominated ion beams. At the Univ. of Maryland the behavior of space-charge dominated beams is being simulated with low-energy electrons. They studied emittance growth, halo formation and beam pulse compression.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129227691","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
Ground motion studies for large future linear colliders 未来大型直线对撞机的地面运动研究
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753376
S. Takeda, N. Yamamoto, K. Oide
{"title":"Ground motion studies for large future linear colliders","authors":"S. Takeda, N. Yamamoto, K. Oide","doi":"10.1109/PAC.1997.753376","DOIUrl":"https://doi.org/10.1109/PAC.1997.753376","url":null,"abstract":"A future large accelerator, such as a TeV linear collider, should have an extremely small emittance to give the required luminosity. Precise alignment of machine components is essential to prevent emittance dilution. The ground motion spoils alignment of the accelerator elements and results in emittance growth. This paper discusses ground motion and its effect on the main linac. The ground motion in the frequency range of seismic vibration is mostly coherent in the related accelerator. However the incoherent diffusive or Brownian like motion may become dominant for a frequency region less than seismic vibration. This paper starts from the power spectrum of the ATL model then shows typical parameters of main linacs and considers measured data including excavated effects.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123847963","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
Multi-pulse extraction from Los Alamos Proton Storage Ring for radiographic applications 洛斯阿拉莫斯质子存储环放射成像应用的多脉冲提取
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749616
H. Thiessen, F. Neri, K. Rust, D.B. Redd
{"title":"Multi-pulse extraction from Los Alamos Proton Storage Ring for radiographic applications","authors":"H. Thiessen, F. Neri, K. Rust, D.B. Redd","doi":"10.1109/PAC.1997.749616","DOIUrl":"https://doi.org/10.1109/PAC.1997.749616","url":null,"abstract":"In Proton Radiography, one of the goals is a motion picture of a rapidly moving object. The Los Alamos Proton Storage Ring (PSR) in its normal operating mode, delivers a single pulse approximately 120 ns wide (fwhm). In development runs at the PSR, we successfully demonstrated operation of a technique to deliver two pulses, each 40 nsec wide, with adjustable spacing.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123952139","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
Nuclotron Control System 核子控制系统
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751237
V. Andreev, V. Gorchenko, A. Kirichenko, A. Kovalenko, I. Kulikov, V. Monchinsky, S. Romanov, B. Sveshnikov, A. Tsarenkov, B. Vasilishin, M. Voevodin, V. Volkov
{"title":"Nuclotron Control System","authors":"V. Andreev, V. Gorchenko, A. Kirichenko, A. Kovalenko, I. Kulikov, V. Monchinsky, S. Romanov, B. Sveshnikov, A. Tsarenkov, B. Vasilishin, M. Voevodin, V. Volkov","doi":"10.1109/PAC.1997.751237","DOIUrl":"https://doi.org/10.1109/PAC.1997.751237","url":null,"abstract":"The superconducting synchrotron, named the Nuclotron is based on miniature iron-shaped held SC-magnets. It was put into operation in March 1993 at the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. Eleven runs of the new accelerator have been performed by the present time. The Nuclotron Control System (NCS) project, which is still under development, started in 1992 and has provided an efficient support for the machine commissioning through all its phases. This paper presents the current status of the whole system and some details of cryogenics, beam injection, and main power supplies subsystems.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123212431","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: 9
Global and local horizontal-vertical decoupling 全局和局部水平-垂直解耦
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750692
L. Teng
{"title":"Global and local horizontal-vertical decoupling","authors":"L. Teng","doi":"10.1109/PAC.1997.750692","DOIUrl":"https://doi.org/10.1109/PAC.1997.750692","url":null,"abstract":"In this paper we investigate systematically the global and local effects of horizontal-vertical couplings on a particle beam and the measurement and control of these couplings. Piecemeal studies have been made on these subjects by different authors. For completeness, their results are integrated in this work wherever appropriate. This brings the understanding and execution of the coupling correction to the same degree of completeness as that of the closed orbit correction.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123501926","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
A 3He/sup ++/ RFQ accelerator for the production of PET isotopes 3He/sup ++/ RFQ加速器，用于生产PET同位素
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753421
R. Pasquinelli
{"title":"A 3He/sup ++/ RFQ accelerator for the production of PET isotopes","authors":"R. Pasquinelli","doi":"10.1109/PAC.1997.753421","DOIUrl":"https://doi.org/10.1109/PAC.1997.753421","url":null,"abstract":"Project status of the /sup 3/He/sup ++/ 10.5 MeV RFQ linear accelerator for the production of PET isotopes will be presented. The accelerator design was begun in September of 1995 with a goal of completion and delivery of the accelerator to BRF in Shreveport, Louisiana by the summer of 1997. The design effort and construction is concentrated in Lab G on the Fermilab campus. Some of the high lights include a 25 mA peak current /sup 3/He/sup +/ ion source, four RFQ accelerating stages that are powered by surplus Fermilab linac RF stations, a gas jet charge doubler, and a novel 540 degree bending Medium Energy Beam Transport (MEET). The machine is designed to operate at 360 Hz repetition rate with a 2.5% duty cycle. The average beam current is expected to be 150-300 micro amperes electrical, 75-150 micro amperes particle current.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120952858","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
Wavelet approach to accelerator problems. II. Metaplectic wavelets 加速器问题的小波方法。2Metaplectic小波
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750741
A. Fedorova, M. Zeitlin, Z. Parsa
{"title":"Wavelet approach to accelerator problems. II. Metaplectic wavelets","authors":"A. Fedorova, M. Zeitlin, Z. Parsa","doi":"10.1109/PAC.1997.750741","DOIUrl":"https://doi.org/10.1109/PAC.1997.750741","url":null,"abstract":"This is the second part of a series of talks in which we present applications of wavelet analysis to polynomial approximations for a number of accelerator physics problems. According to the orbit method and by using construction from the geometric quantization theory we construct the symplectic and Poisson structures associated with generalized wavelets by using metaplectic structure and corresponding polarization. The key point is a consideration of the semidirect product of the Heisenberg group and metaplectic group as subgroup of the automorphism group dual to the symplectic space, which consists of elements acting by affine transformations.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121195374","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
A scanning target profile monitor for the slow extracted beam at the AGS AGS慢速提取光束的扫描目标剖面监视器
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751137
K. Brown, I. Chiang, D. Gassner, J. Geller, J. Glenn, J. Hock, G.A. Smith, J. Tuozzolo, R. Witkover, E. Zitvogel
{"title":"A scanning target profile monitor for the slow extracted beam at the AGS","authors":"K. Brown, I. Chiang, D. Gassner, J. Geller, J. Glenn, J. Hock, G.A. Smith, J. Tuozzolo, R. Witkover, E. Zitvogel","doi":"10.1109/PAC.1997.751137","DOIUrl":"https://doi.org/10.1109/PAC.1997.751137","url":null,"abstract":"The purpose of this new instrument is for probing beam halo and obtaining beam profiles of the resonant extracted beam at the AGS. The device described is a prototype version, to obtain data and prepare for a more permanent device. The goals of the permanent device are to allow emittances of low current, but high intensity slowly extracted beams to be accurately measured and to have a diagnostic for probing the wings of the beam distribution. The device works on secondary emission from thin targets as well as scattering into two scintillator telescopes. The targets are movable over the entire aperture at the device.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114356592","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
Results of blowout regime propagation experiments of an electron beam in a plasma 电子束在等离子体中的爆轰状态传播实验结果
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749785
N. Barov, M. Conde, W. Gai, J.B. Rosenweig
{"title":"Results of blowout regime propagation experiments of an electron beam in a plasma","authors":"N. Barov, M. Conde, W. Gai, J.B. Rosenweig","doi":"10.1109/PAC.1997.749785","DOIUrl":"https://doi.org/10.1109/PAC.1997.749785","url":null,"abstract":"Short intense relativistic bunches, of the kind available from RF photoinjectors, have been observed, through integrated and time-dependent imaging, as well as collimator transmission, to effectively self-guide in an underdense plasma over many times the initial /spl beta/-function. Picosecond resolution measurement of transverse beam size displays the trumpet-shaped beam head predicted by simulations and analysis. The simulations are in good quantitative agreement with the beam sizes and transmissions obtained from experiment, with deviations arising from the approximations involved in the simulation model of the beam.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116299671","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
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