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

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Orbit measurement and correction in the LNLS Synchrotron Light Source LNLS同步加速器光源的轨道测量与校正
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751119
R. Farias, L.C. Jahnel, Liu Lin, D. Macedo, F. Rafael, A. Rodrigues, P. Tavares
{"title":"Orbit measurement and correction in the LNLS Synchrotron Light Source","authors":"R. Farias, L.C. Jahnel, Liu Lin, D. Macedo, F. Rafael, A. Rodrigues, P. Tavares","doi":"10.1109/PAC.1997.751119","DOIUrl":"https://doi.org/10.1109/PAC.1997.751119","url":null,"abstract":"The orbit measurement and correction system of the LNLS synchrotron light source is presented. Measurements of the correction matrix, orbit stability and reproducibility are presented and discussed.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"45 4 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":"131296180","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
Test of duoplasmatron with cold cathode for cw operation 双等离子体冷阴极连续放电试验
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.752748
A. Kolomiets, B. Kondratiev, V. I. Turchin
{"title":"Test of duoplasmatron with cold cathode for cw operation","authors":"A. Kolomiets, B. Kondratiev, V. I. Turchin","doi":"10.1109/PAC.1997.752748","DOIUrl":"https://doi.org/10.1109/PAC.1997.752748","url":null,"abstract":"A pulse duoplasmatron with a cold cathode used at preinjectors of the ITEP proton linacs has been tested for generation of a dc proton beam. The operation of the duoplasmatron was studied experimentally with low currents of the discharge. The test bench experiments allowed to modify construction of a pulsed ion source for stable dc operation with a high lifetime. The ion source generated a dc beam of protons with a current /spl ap/12 mA at 30 kV.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"38 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":"131859931","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
GdfidL: a finite difference program with reduced memory and CPU usage GdfidL:一个减少内存和CPU使用的有限差分程序
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751304
W. Bruns
{"title":"GdfidL: a finite difference program with reduced memory and CPU usage","authors":"W. Bruns","doi":"10.1109/PAC.1997.751304","DOIUrl":"https://doi.org/10.1109/PAC.1997.751304","url":null,"abstract":"Two new field solvers based on the FDTD algorithm are described. One solver computes resonant fields in loss-free structures, the other computes time dependent fields, scattering parameters and wake potentials in lossy or loss-free structures. The program uses linked lists instead of three dimensional arrays to model the computational volume. The main advantage of this approach is: Grid cells are only needed in regions, which are not filed with electric or magnetic conducting materials. This may result in an appreciable reduction of memory and CPU usage. The modeling via the linked lists is described in detail and some examples of calculated realistic geometries are given.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"193 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":"133810575","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: 33
Improvements in curing coupled bunch instabilities at ELETTRA by mode shifting after the installation of the adjustable higher order mode frequency shifter (HOMFS) 安装可调高阶模态移频器(HOMFS)后模移对ELETTRA耦合束不稳定性的改善
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750820
M. Svandrlik, A. Fabris, C. Pasotti
{"title":"Improvements in curing coupled bunch instabilities at ELETTRA by mode shifting after the installation of the adjustable higher order mode frequency shifter (HOMFS)","authors":"M. Svandrlik, A. Fabris, C. Pasotti","doi":"10.1109/PAC.1997.750820","DOIUrl":"https://doi.org/10.1109/PAC.1997.750820","url":null,"abstract":"Mode shifting is the technique used at the third generation synchrotron light source ELETTRA to cure Coupled Bunch instabilities (CBI). Temperature tuning of the RF cavities, based on an analytical prediction algorithm, allows longitudinal stable operating conditions to be obtained. However, once longitudinal stability has been achieved transverse instabilities can be observed, particularly during the energy ramp from 1.0 to 2.0 GeV. There has therefore been the need to extend the flexibility of the mode shifting technique. This has been achieved by the installation of adjustable HOMFS on the storage ring RF cavities. The HOMFS is effective on those longitudinal and transverse cavity Higher Order Modes which are unstable over a wide temperature range, by shifting them out of the operating temperature interval of the cavity. The installation of the HOMFS has improved the reliability and reproducibility of machine operation, also in view of the beam current upgrade.","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":"115333058","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
LNLS vacuum system commissioning LNLS真空系统调试
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753296
M. Ferreira, R. Ferraz, F.A. Minuzzi, M.B. Silva
{"title":"LNLS vacuum system commissioning","authors":"M. Ferreira, R. Ferraz, F.A. Minuzzi, M.B. Silva","doi":"10.1109/PAC.1997.753296","DOIUrl":"https://doi.org/10.1109/PAC.1997.753296","url":null,"abstract":"The Brazilian National Synchrotron Light Laboratory, LNLS, operates a synchrotron light source consisting of a 1.37 GeV electron storage ring and a 120 MeV injector. A summary of the commissioning and operation performance of the vacuum system for the linear accelerator (LINAC), transport line, RF system and storage ring is presented. The performance of the subsystems is described including the photon induced desorptions (PID) and the effects on the beam lifetime.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"168 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":"115481282","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
AIRIX prototype technological results at CESTA AIRIX原型技术成果在CESTA
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749991
P. Anthouard, J. Bardy, C. Bonnafond, P. Delsart, A. Devin, P. Eyharts, P. Eyl, D. Guilhem, J. Labrouche, J. Launspach, J. de Mascureau, A. Roques, M. Thévenot, D. Villate, L. Voisin, E. Merle, J. Picon
{"title":"AIRIX prototype technological results at CESTA","authors":"P. Anthouard, J. Bardy, C. Bonnafond, P. Delsart, A. Devin, P. Eyharts, P. Eyl, D. Guilhem, J. Labrouche, J. Launspach, J. de Mascureau, A. Roques, M. Thévenot, D. Villate, L. Voisin, E. Merle, J. Picon","doi":"10.1109/PAC.1997.749991","DOIUrl":"https://doi.org/10.1109/PAC.1997.749991","url":null,"abstract":"AIRIX Flash X-ray Radiographic facility is based on a 4 MeV-3,5 kA pulsed electron injector and a 16 MeV induction accelerator. The accelerator will consist of 64 induction cells powered by 32 H.V. generators operated at 250 kV. The final 20 MeV electron beam will be focused on a target designed for X-ray conversion. At CESTA, PIVAIR is a testbed designed as a validation step of AIRIX up to 8 MeV. The injector has been connected with 16 accelerating cells, increasing electron beam energy to 7.2 MeV. Two kinds of induction cells have been developed and tested. A focusing experiment is planned for electron beam spot diameter measurements. After this step, beam focusing on a target will be experimented for X-ray source characterization.","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":"115573781","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
Status and early commissioning of the PEP-II High Energy Ring PEP-II高能环的现状及早期调试
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749627
U. Wienands, E. Reuter, P. Bellomo, A. Fisher, J. Gracia, R. Gray, M. Pietryka, T. Taylor, V. Bharadwaj, R. Iverson, A. Kulikov, J. Seeman, J. Turner, C. Belser, M. Zisman, S. Zholents
{"title":"Status and early commissioning of the PEP-II High Energy Ring","authors":"U. Wienands, E. Reuter, P. Bellomo, A. Fisher, J. Gracia, R. Gray, M. Pietryka, T. Taylor, V. Bharadwaj, R. Iverson, A. Kulikov, J. Seeman, J. Turner, C. Belser, M. Zisman, S. Zholents","doi":"10.1109/PAC.1997.749627","DOIUrl":"https://doi.org/10.1109/PAC.1997.749627","url":null,"abstract":"The High Energy Ring of the PEP-II B-Factory has been constructed in the PEP tunnel. It is now beginning beam commissioning. This report will address the status of the ring systems and our experience in commissioning the systems as well as the first beam running.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"20 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":"115729465","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
Improved measurement of electric field uniformity in horizontal electrostatic separators 改进了水平式静电分离器电场均匀性的测量方法
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753392
A. Temnykh, J. J. Welch
{"title":"Improved measurement of electric field uniformity in horizontal electrostatic separators","authors":"A. Temnykh, J. J. Welch","doi":"10.1109/PAC.1997.753392","DOIUrl":"https://doi.org/10.1109/PAC.1997.753392","url":null,"abstract":"An improved technique for measuring the uniformity of the electric field between the deflecting plates of a electrostatic separator was developed and applied to the measurement of a horizontal separator at CESR. The effect of stray charge was found to be limiting accuracy in previous measurements. Appropriate shielding has eliminated the problem.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"58 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":"115729591","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
Measurement and simulation of nonlinear beam-beam mode coupling in the Fermilab Tevatron 费米实验室Tevatron中非线性束流模式耦合的测量与仿真
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.751002
S. Assadi, C. Mishra
{"title":"Measurement and simulation of nonlinear beam-beam mode coupling in the Fermilab Tevatron","authors":"S. Assadi, C. Mishra","doi":"10.1109/PAC.1997.751002","DOIUrl":"https://doi.org/10.1109/PAC.1997.751002","url":null,"abstract":"The Tevatron beam dynamics has been studied from the \"weak-strong\" representation of the beam-beam effects for various octupole field settings. A single particle is tracked using TEAPOT in the presence of the other beam. The nonlinearities introduced by the beam-beam forces introduces two unwanted effects: (1) it excites nonlinear resonances; (2) it introduces dispersion of the tunes with amplitude. The strength of nonlinear three mode coupling satisfying the sum rules v/sub 3/=v/sub 1//spl plusmn/v/sub 2/ for various octupole settings are calculated. The higher order spectral analysis results are presented.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"76 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":"124188664","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
The CERN PS east area in the LHC era 大型强子对撞机时代的CERN PS东部区域
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749601
L. Durieu, O. Ferrando, J. Hemery, J. Riunaud, B. Williams
{"title":"The CERN PS east area in the LHC era","authors":"L. Durieu, O. Ferrando, J. Hemery, J. Riunaud, B. Williams","doi":"10.1109/PAC.1997.749601","DOIUrl":"https://doi.org/10.1109/PAC.1997.749601","url":null,"abstract":"Experiments planned at the CERN Large Hadron Collider (LHC) will require a well-equipped test area with low momentum (<15 Gev/c) secondary particle beams. These beams will be used to test some of the LHC detectors components (ALICE, ATLAS, CMS, LHC-B). In addition another recently approved experiment (DIRAC) will be installed in the PS East Area. This experiment will require a primary proton beam of 24 GeV/c to test QCD predictions. In this context, the EHNL project (East Hall New Look) has been launched. The major modifications include (i) an extension of the present area with a primary 24 GeV/c beam line, (ii) a new secondary beam line layout with test areas at 3.5, 7, 10 and 15 GeV/c, (iii) an additional irradiation area, (iv) an improved facility for beam sharing between the various users. This paper describes the scope of the project, its new features, the planned facilities and its installation schedule.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"19 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":"114761904","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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