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

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Design of an elliptical undulator and X-ray beam line at DSR of RIKEN RI beam factory project 日本理研研究所束流工厂项目DSR中椭圆波动器和x射线束流线的设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753262
M. Wakasugi, T. Katayama
{"title":"Design of an elliptical undulator and X-ray beam line at DSR of RIKEN RI beam factory project","authors":"M. Wakasugi, T. Katayama","doi":"10.1109/PAC.1997.753262","DOIUrl":"https://doi.org/10.1109/PAC.1997.753262","url":null,"abstract":"According to requirements from the X-ray-RI collision experiment at DSR that is proposed in the RIKEN RI beam factory project, an undulator for elliptically polarized X rays was designed. An Apple-II type of undulator was adopted so that both the X-ray energy and the polarization are continuously changed at the same time. The photon flux of more than 10/sup 15/ photons/s/0.1%b.w, is calculated for any polarization in the energy range of 30-800 eV.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"29 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":"127976119","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
New high power linacs and beam physics 新型高功率直线加速器和束流物理
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749882
T. Wangler, E. Gray, S. Nath, K. Crandall, K. Hasegawa
{"title":"New high power linacs and beam physics","authors":"T. Wangler, E. Gray, S. Nath, K. Crandall, K. Hasegawa","doi":"10.1109/PAC.1997.749882","DOIUrl":"https://doi.org/10.1109/PAC.1997.749882","url":null,"abstract":"New high-power proton linacs must be designed to control beam loss, which can lead to radioactivation of the accelerator. The threat of beam loss is increased significantly by the formation of beam halo. Numerical simulation studies have identified the space-charge interactions, especially those that occur in rms mismatched beams, as a major concern for halo growth. The maximum-amplitude predictions of the simulation codes must be subjected to independent tests to confirm the validity of the results. Consequently, we compare predictions from the particle-core halo models with computer simulations to test our understanding of the halo mechanisms that are incorporated in the computer codes. We present and discuss scaling laws that provide guidance for high-power linac design.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"1 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":"121787753","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
Externally powered dielectric loaded waveguides as accelerating structures 作为加速结构的外部供电介质负载波导
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749788
W. Gai, R. Konecny, J. Simpson
{"title":"Externally powered dielectric loaded waveguides as accelerating structures","authors":"W. Gai, R. Konecny, J. Simpson","doi":"10.1109/PAC.1997.749788","DOIUrl":"https://doi.org/10.1109/PAC.1997.749788","url":null,"abstract":"There have been numerous studies examining the use of dielectric materials in accelerating structures in the past. Such studies and related experiments generally concluded that dielectric losses, with the resulting high power requirements, and field breakdown problems made such devices not very attractive. However, development of high dielectric constant, low loss materials plus new demands for emittance preserving acceleration warrant a new look at the idea. In this paper, we discuss reference parameter designs for S-band and X-band structures and show that dielectric loaded guide may now be practical and have certain advantages over conventional iris loaded structures. Preliminary experimental test results of X-band dielectric devices are reported.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"651 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":"131980492","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
Analytic nonlinear methods for beam optics 光束光学的非线性解析方法
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750688
J. Irwin
{"title":"Analytic nonlinear methods for beam optics","authors":"J. Irwin","doi":"10.1109/PAC.1997.750688","DOIUrl":"https://doi.org/10.1109/PAC.1997.750688","url":null,"abstract":"In recent years there have been major advances in the computation and use of high-order maps for the design, optimization and operation of beamlines. We will describe five practical examples for both linear and circular colliders.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"39 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":"132021154","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
In-situ proton irradiation and measurement of superconducting RF cavities under cryogenic conditions 低温条件下超导射频腔的原位质子辐照与测量
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753120
B. Rusnak, W. Haynes, K.C.D. Chan, R. Gentzlinger, R. Kidman, N. King, R. Lujan, M. Maloney, S. Ney, A. Shapiro, J. Ullmann, A. Hanson, H. Safa
{"title":"In-situ proton irradiation and measurement of superconducting RF cavities under cryogenic conditions","authors":"B. Rusnak, W. Haynes, K.C.D. Chan, R. Gentzlinger, R. Kidman, N. King, R. Lujan, M. Maloney, S. Ney, A. Shapiro, J. Ullmann, A. Hanson, H. Safa","doi":"10.1109/PAC.1997.753120","DOIUrl":"https://doi.org/10.1109/PAC.1997.753120","url":null,"abstract":"The Accelerator Production of Tritium (APT) Project is investigating using a superconducting linac for the high-energy portion of the accelerator. As this accelerator would be used to accelerate a high-current (100-mA) CW proton beam up to 1700 MeV, it is important to determine the effects of stray-beam impingement on the superconducting properties of 700-MHz Nb cavities. To accomplish this, two 3000-MHz elliptical niobium cavities were placed in a cryostat, cooled to nominally 2 K in sub-atmospheric liquid helium, and irradiated with 798-MeV protons at up to 490-nA average current. The elliptically shaped beam passed through the equatorial regions of both cavities in order to maximize sensitivity to any changes in the superconducting surface resistance. Over the course of the experiment, 6/spl times/10/sup 16/ protons were passed through the cavities. After irradiation, the cavities were warmed to 250 K, then recooled to investigate the effects of a room-temperature annealing cycle on the superconducting properties of the irradiated cavities. A detailed description of the experiment and the results shall be presented. These results are important to employing superconducting RF technology to future high-intensity proton accelerators for use in research and transmutation technologies.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"10 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":"130063887","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
Canadian Light Source proposal 加拿大光源方案
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749814
L. Dallin, D.M. Skopik
{"title":"Canadian Light Source proposal","authors":"L. Dallin, D.M. Skopik","doi":"10.1109/PAC.1997.749814","DOIUrl":"https://doi.org/10.1109/PAC.1997.749814","url":null,"abstract":"The storage ring for a 2.9 GeV Canadian Light Source has been designed. The lattice is composed of twelve compact DBA cells resulting in a ring that is 148 meters in circumference with twelve drifts of 4.5 meters for the inclusion of insertion devices. The emittance is less than 20 nm-rad, resulting in radiation brightness competitive with other \"third generation\" sources. Details of orbit correction, beam stability and lifetime and the effect of insertion devices have been investigated. The RF requirements have been defined and preliminary magnet designs have been done. The light source will operate with full energy injection and the injection scheme has been fully defined. Injection includes a 300 MeV linear accelerator, low energy transfer line, booster synchrotron and high energy transfer to the storage ring. With this configuration it will be possible to operate the storage ring with beam currents up to 500 mA, resulting in a source of very intense light over a broad range of photon energies. Far example, with a state of the art undulator, it will be possible to produce 20 keV photons with a brightness close to 10/sup 18/ photons/s/mm/sup 2//mrad/sup 2//0.1% bandwidth.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"110 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":"134027011","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
Magnetic design of superconducting quadrupoles for a SC linac for APT 超导四极磁体的设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753205
S. Kahn, P. Wanderer
{"title":"Magnetic design of superconducting quadrupoles for a SC linac for APT","authors":"S. Kahn, P. Wanderer","doi":"10.1109/PAC.1997.753205","DOIUrl":"https://doi.org/10.1109/PAC.1997.753205","url":null,"abstract":"This paper describes the magnetic design for superconducting quadrupoles to be used in the superconducting option of the proton linac for the Accelerator Production of Tritium (APT) project. The quadrupole magnets provide the focusing for a singlet FODO lattice used in the linac. The magnets have a 16 cm (13 cm) aperture in the hi-/spl beta/ (medium-/spl beta/) section of the linac. The proposed design is a coil dominated magnet with an iron yoke at a larger radius to shield the magnetic field from other parts of the accelerator. The field performance, field quality, peak field and forces on the conductor are discussed.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"46 52","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134225643","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
Inverse logarithm decay of long-term dynamic aperture in hadron colliders 强子对撞机长期动态孔径的逆对数衰减
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750721
M. Giovannozzi, W. Scandale, E. Todesco
{"title":"Inverse logarithm decay of long-term dynamic aperture in hadron colliders","authors":"M. Giovannozzi, W. Scandale, E. Todesco","doi":"10.1109/PAC.1997.750721","DOIUrl":"https://doi.org/10.1109/PAC.1997.750721","url":null,"abstract":"The long-term behaviour of the non-linear single-particle dynamics is considered for the 4D Henon map. The dynamic aperture is defined as the average of the particle loss boundary over several ratios of emittances. Using this definition, survival plots turn out to decay with the inverse of the logarithm of the number of turns. We also compare the extrapolation of the dynamic aperture with the prediction of the maximal Lyapunov exponent.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"16 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":"131821218","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
Magnetic design of a high gradient quadrupole for the LHC low-/spl beta/ insertions LHC低/spl β /插入高梯度四极磁极的设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753221
G. Sabbi, S. Gourlay, J. Kerby, M. Lamm, P. Limon, F. Nobrega, I. Novitski, J. Strait, A. Zlobin, S. Caspi, R. Scanlan, A. Ghosh, R. Gupta
{"title":"Magnetic design of a high gradient quadrupole for the LHC low-/spl beta/ insertions","authors":"G. Sabbi, S. Gourlay, J. Kerby, M. Lamm, P. Limon, F. Nobrega, I. Novitski, J. Strait, A. Zlobin, S. Caspi, R. Scanlan, A. Ghosh, R. Gupta","doi":"10.1109/PAC.1997.753221","DOIUrl":"https://doi.org/10.1109/PAC.1997.753221","url":null,"abstract":"Fermilab, Lawrence Berkeley National Laboratory and Brookhaven National Laboratory have formed a consortium to provide components for the Large Hadron Collider (LHC) to be built at CERN. The U.S. contribution includes half of the high gradient quadrupoles (HGQ) for the inner focusing triplets. In this paper a description of the HGQ magnetic design is given, including short sample limit for field gradient, sources and expected values of systematic and random field errors, and possible strategies for field quality correction.","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":"126585212","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
Low-level RF system design for the Accelerator Test Facility (ATF) damping ring 加速器测试设施(ATF)阻尼环的低电平射频系统设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749640
M. Minty, K. Kubo, F. Hinode, S. Sakanaka, J. Urakawa
{"title":"Low-level RF system design for the Accelerator Test Facility (ATF) damping ring","authors":"M. Minty, K. Kubo, F. Hinode, S. Sakanaka, J. Urakawa","doi":"10.1109/PAC.1997.749640","DOIUrl":"https://doi.org/10.1109/PAC.1997.749640","url":null,"abstract":"The ATF damping ring was built to demonstrate the production of low emittance, high current beams for future linear colliders. To attain high beam currents, multiple high current bunch trains are required. The low-level RF system should be designed to minimize both steady-state and transient beam loading effects in the accelerating cavities. In addition the design should be sufficiently flexible to allow for a variety of beam dynamics tests which require a wide range of beam currents and cavity voltages. The low-level RF system and stability boundaries for reduced power and full power operation are discussed in this paper.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"42 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":"125208726","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
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