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Proceedings of International Conference on Particle Accelerators最新文献

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CARM and harmonic gyro-amplifier experiments at 17 GHz 17 GHz下的CARM和谐波陀螺放大器实验
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309418
W. Menninger, B. Danly, S. Alberti, C. Chen, E. Giguet, J. Rullier, R. Temkin
{"title":"CARM and harmonic gyro-amplifier experiments at 17 GHz","authors":"W. Menninger, B. Danly, S. Alberti, C. Chen, E. Giguet, J. Rullier, R. Temkin","doi":"10.1109/PAC.1993.309418","DOIUrl":"https://doi.org/10.1109/PAC.1993.309418","url":null,"abstract":"Cyclotron resonance maser amplifiers are possible sources for applications such as electron cyclotron resonance heating of fusion plasmas and driving high-gradient rf linear accelerators. For accelerator drivers, amplifiers or phase locked-oscillators are required. A 17 GHz cyclotron autoresonance maser (CARM) amplifier experiment and a 17 GHz third harmonic gyro-amplifier experiment are presently underway at the MIT plasma Fusion Center. Using the SRL/MIT SNOMAD II induction accelerator to provide a 380 kV, 180 A, 30 ns flat-top electron beam, the gyro-amplifier experiment has produced 5 MW of rf power with over 50 dB of gain at 17 GHz. The gyro-amplifier operates in the TE/sub 31/ mode using a third harmonic interaction. Because of its high power output, the gyroamplifier will be used as the rf source for a photocathode rf electron gun experiment also taking place at MIT. Preliminary gyro-amplifier results are presented, including measurement of rf power, gain versus interaction length, and the far-field pattern. A CARM experiment designed to operate in the TE/sub 11/ mode is also discussed.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125964389","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: 4
Knowledge rule base for the beam optics program TRACE 3-D 光束光学程序TRACE 3-D的知识规则库
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309007
G. Gillespie, P. K. Van Staagen, B. W. Hill
{"title":"Knowledge rule base for the beam optics program TRACE 3-D","authors":"G. Gillespie, P. K. Van Staagen, B. W. Hill","doi":"10.1109/PAC.1993.309007","DOIUrl":"https://doi.org/10.1109/PAC.1993.309007","url":null,"abstract":"An expert system type of knowledge rule base has been developed for the input parameters used by the particle beam transport program TRACE 3-D. The goal has been to provide the program's user with adequate on-screen information to allow him to initially set up a problem with minimal \"off-line\" calculations. The focus of this work has been in developing rules for the parameters which define the beam line transport elements. Ten global parameters, the particle mass and charge, beam energy, etc., are used to provide \"expert\" estimates of lower and upper limits for each of the transport element parameters. For example, the limits for the field strength of the quadrupole element are based on a water-cooled, iron-core electromagnet with dimensions derived from practical engineering constraints, and the upper limit for the effective length is scaled with the particle momenta so that initially parallel trajectories do not cross the axis inside the magnet. Limits for the quadrupole doubler and triplet parameters incorporate these rules and additional rules based on stable FODO lattices and bidirectional focusing requirements. The structure of the rule base is outlined and examples for the quadrupole singlet, doublet and triplet are described. The rule base has been implemented within the Shell for Particle Accelerator Related Codes (SPARC) graphical user interface (GUI).<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"39 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126059720","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
Design of a high duty cycle, asymmetric emittance RF photocathode injector for linear collider applications 用于线性对撞机的高占空比、非对称发射度射频光电阴极注入器的设计
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309537
J. Rosenzweig, E. Colby, C. Jackson, T. Nicol
{"title":"Design of a high duty cycle, asymmetric emittance RF photocathode injector for linear collider applications","authors":"J. Rosenzweig, E. Colby, C. Jackson, T. Nicol","doi":"10.1109/PAC.1993.309537","DOIUrl":"https://doi.org/10.1109/PAC.1993.309537","url":null,"abstract":"One of the attractive features of the superconducting approach to linear collider design is that the transverse emittances demanded are much larger than in normal conducting schemes. For TESLA design parameters, the damping rings appear to be relatively large and expensive, and it is therefore of some interest to look into alternative sources. For electrons, a promising source candidate is an RF photocathode. In this paper, we present conceptual design work towards development of an asymmetric emittance RF photocathode source which can operate at the TESLA repetition rates and duty cycle, and is capable of emitting beams with the required emittances and charge per pulse.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126107332","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
Measurement of microwave properties of X-band accelerating structure under pulsed high-power operation at liquid nitrogen temperature 液氮温度下脉冲大功率工作下x波段加速结构微波特性的测量
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308693
A. J. Saversky, I. S. Shchedrin
{"title":"Measurement of microwave properties of X-band accelerating structure under pulsed high-power operation at liquid nitrogen temperature","authors":"A. J. Saversky, I. S. Shchedrin","doi":"10.1109/PAC.1993.308693","DOIUrl":"https://doi.org/10.1109/PAC.1993.308693","url":null,"abstract":"After required chemical treatments a disk-loading structure was operated at liquid nitrogen temperature with X-band magnetron as an RF source. The peak RF pulse power was variable from 150 to 300 KW and the average power was altered by changing the pulse repetition rate between 1400 and 2800 pps. Measurements on this structure both at low and at high power indicated the Q factor of 6800 at room temperature,which increased to 17000. At liquid nitrogen temperature-an enhancement factor greater then 2,5 in good agreement with theory.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"49 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126122207","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
Design of a 90/spl deg/ overmoded waveguide bend 90/声压度/过模波导弯曲设计
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308710
C. Nantista, N. Kroll, E. Nelson
{"title":"Design of a 90/spl deg/ overmoded waveguide bend","authors":"C. Nantista, N. Kroll, E. Nelson","doi":"10.1109/PAC.1993.308710","DOIUrl":"https://doi.org/10.1109/PAC.1993.308710","url":null,"abstract":"A design for a 90/spl deg/ bend for the TE/sub 01/ mode in over-moded circular waveguide is presented. A pair of septa, symmetrically placed perpendicular to the plane of the bend, are adiabatically introduced into the waveguide before the bend and removed after it. Introduction of the curvature excites five propagating modes in the curved section. The finite element field solver YAP is used to calculate the propagation constants of these modes in the bend, and the guide diameter, septum depth, septum thickness, and bend radius are set so that the phase advances of all five modes through the bend are equal module 2/spl pi/. To a good approximation these modes are expected to recombine to form a pure mode at the end of the bend.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123585531","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
AMS: area message service for SLC AMS:用于SLC的区域消息服务
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309193
M. Crane, R. Mackenzie, D. Millsom, M. Zelazny
{"title":"AMS: area message service for SLC","authors":"M. Crane, R. Mackenzie, D. Millsom, M. Zelazny","doi":"10.1109/PAC.1993.309193","DOIUrl":"https://doi.org/10.1109/PAC.1993.309193","url":null,"abstract":"The Area Message Service (AMS) is a TCP/IP based messaging service currently in use at SLAC. A number of projects under development here at SLAC require an application level interface to the 4.3BSD UNIX socket level communications functions using TCP/IP over ethernet. AMS provides connection management, solicited message transfer, unsolicited message transfer, and asynchronous notification of pending messages. AMS is written completely in ANSI 'C' and is currently portable over three hardware/operating system/network manager platforms, VAX/VMS/sup 1Multinet/sup 2/, PC/MS-DOS/sup 3Pathworks/sup 4/, VME 68K/pSOS/pNA/sup 5/. The basic architecture is a client-server connection where either end of the interface may be the server. This allows for connections and data flow to be initiated from either end of the interface. Included are details concerning the connection management, the handling of the multi-platform code, and the implementation process.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125340957","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
Higher order mode dampers for the KAON booster cavity KAON助推腔的高阶模式阻尼器
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308712
A. Mitra
{"title":"Higher order mode dampers for the KAON booster cavity","authors":"A. Mitra","doi":"10.1109/PAC.1993.308712","DOIUrl":"https://doi.org/10.1109/PAC.1993.308712","url":null,"abstract":"A prototype higher order mode (HOM) damper cavity has been designed and tested on a ferrite tuned booster cavity proposed for the KAON factory at TRIUMF. The damper cavity has been designed to keep the overall length to a minimum and has been optimized by using the SUPERFISH code. Low level signal measurements of unloaded and loaded Q of the booster cavity without and with the damper cavity respectively have been reported and it has been demonstrated that nearly all modes up to 1 GHz which couple to the accelerating gap are damped by the mode damper. In order to reduce the coupling at the booster fundamental frequencies by this type of damper, a new concept of damping higher order modes in the KAON booster cavity by employing a high-pass filter is presented. Conceptual design, prototype realization of such a filter in coaxial form and measurements of damping are outlined. Preliminary measurements show that the higher order modes up to 900 MHz are damped significantly with very little power absorption at the fundamental frequencies.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125392166","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
Optimum steering of photon beamlines in SPEAR SPEAR中光子束线的最佳控制
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309065
W. Corbett, B. Pong, M. Lee, V. Ziemann
{"title":"Optimum steering of photon beamlines in SPEAR","authors":"W. Corbett, B. Pong, M. Lee, V. Ziemann","doi":"10.1109/PAC.1993.309065","DOIUrl":"https://doi.org/10.1109/PAC.1993.309065","url":null,"abstract":"A common operational requirement for many synchrotron light sources is to maintain steered photon beamlines with minimum corrector strength values. To solve this problem for SPEAR, we employed the singular value decomposition matrix-inversion technique to minimize corrector strengths while constraining the photon beamlines to remain on target. The result was a reduction in corrector strengths, yielding increased overhead for the photon-beam position feedback systems.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125398546","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: 4
Operating experience with high beta superconducting RF cavities 高β超导射频腔的操作经验
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308784
H. Dylla, L. Doolittle, J. Benesch
{"title":"Operating experience with high beta superconducting RF cavities","authors":"H. Dylla, L. Doolittle, J. Benesch","doi":"10.1109/PAC.1993.308784","DOIUrl":"https://doi.org/10.1109/PAC.1993.308784","url":null,"abstract":"The number of installed and operational /spl beta/=1 superconducting RF cavities has grown significantly over the last two years in accelerator laboratories in Europe, Japan and the U.S. The total installed acceleration capability as of mid-1993 is approximately 1 GeV at nominal gradients. Major installations at CERN, DESY, KEK and CEBAF have provided large increments to the installed base and valuable operational experience. A selection of test data and operational experience gathered to date is reviewed.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125400289","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
Lattice design for the 1.7-GeV light source BESSY II 点阵设计为1.7 gev光源BESSY II
Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309063
E. Jaeschke, D. Kramer, B. Kuske, P. Kuske, M. Scheer, E. Weihreter, G. Wustefeld
{"title":"Lattice design for the 1.7-GeV light source BESSY II","authors":"E. Jaeschke, D. Kramer, B. Kuske, P. Kuske, M. Scheer, E. Weihreter, G. Wustefeld","doi":"10.1109/PAC.1993.309063","DOIUrl":"https://doi.org/10.1109/PAC.1993.309063","url":null,"abstract":"BESSY II is a third generation synchrotron radiation light source presently under construction at Berlin-Adlershof. BESSY II will go into operation at the end of 1997. The main lattice features of the low emittance storage ring are presented. Special aspects of the design are a compact and flexible double bend achromat lattice, which offers 16 straight sections at a circumference of 240 m. About three superconducting wavelength shifters are foreseen for operation.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116146393","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: 16
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