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

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A divide-down RF source generation system for the Advanced Photon Source 一种用于先进光子源的分频射频源生成系统
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753063
D. Horan, F. Lenkszus, R. Laird
{"title":"A divide-down RF source generation system for the Advanced Photon Source","authors":"D. Horan, F. Lenkszus, R. Laird","doi":"10.1109/PAC.1997.753063","DOIUrl":"https://doi.org/10.1109/PAC.1997.753063","url":null,"abstract":"A divide-down RF source system has been designed and built at Argonne National Laboratory to provide harmonically-related and phase-locked RF source signals between the APS 352-MHz storage ring and booster synchrotron RF systems and the 9.77-MHz and 117-MHz positron accumulator ring RF systems. The design provides rapid switching capability back to individual RF synthesizers for each one. The system also contains a digital bucket phase shifter for injection bucket selection. Input 352-MHz RF from a master synthesizer is supplied to a VXI-based ECL divider board which produces 117-MHz and 9.77-MHz square-wave outputs. These outputs are passed through low-pass filters to produce pure signals at the required fundamental frequencies. These signals, plus signals at the same frequencies from independent synthesizers, are fed to an interface chassis where source selection is made via local/remote control of coaxial relays. This chassis also produces buffered outputs at each frequency for monitoring and synchronization of ancillary equipment.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"138 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":"116345854","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
High power 20 GHz RF source based on seventh harmonic co-generation 基于七次谐波热电联产的大功率20ghz射频源
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753145
Changbiao Wang, J. Hirshfield, A. Ganguly
{"title":"High power 20 GHz RF source based on seventh harmonic co-generation","authors":"Changbiao Wang, J. Hirshfield, A. Ganguly","doi":"10.1109/PAC.1997.753145","DOIUrl":"https://doi.org/10.1109/PAC.1997.753145","url":null,"abstract":"The TE/sub 72/ mode in cylindrical waveguide has its group velocity nearly equal to that of the TE/sub 11/ mode when the operating frequency of the former is seven times of that of the latter. Thus the two modes have almost the same resonant magnetic field, and coherent radiation can be generated at the 7th harmonic when the fundamental energizes a gyrating electron beam by the cyclotron autoresonance interaction. It is shown analytically that the electron's gyration radius, normalized to waveguide radius, must be less than 0.5431 in the cyclotron autoresonance interaction. This analytical prediction is well confirmed by computer simulations. For a 300 kV, 30 A warm beam driven by 20 MW RF power at 2.856 GHz, simulations indicate that 7th harmonic power of up to 16 MW at 20 GHz can be obtained.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":" 25","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113952167","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
Orbit analysis for the RIKEN superconducting ring cyclotron RIKEN超导环形回旋加速器的轨道分析
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749931
T. Mitsumoto, A. Goto, T. Kawaguchi, J. Kim, Y. Tanaka, T. Kubo, H. Okuno, T. Tominaka, S. Fujishima, K. Ikegami, N. Sakamoto, T. Morikawa, S. Yokouchi, Y. Yano
{"title":"Orbit analysis for the RIKEN superconducting ring cyclotron","authors":"T. Mitsumoto, A. Goto, T. Kawaguchi, J. Kim, Y. Tanaka, T. Kubo, H. Okuno, T. Tominaka, S. Fujishima, K. Ikegami, N. Sakamoto, T. Morikawa, S. Yokouchi, Y. Yano","doi":"10.1109/PAC.1997.749931","DOIUrl":"https://doi.org/10.1109/PAC.1997.749931","url":null,"abstract":"An \"RI beam factory\" has started to be contracted as the next project of the RIKEN Accelerator Research Facility (RARF). The \"RI beam factory\" aims at production and acceleration of radioactive isotope beams covering the whole mass region. It requires the energy of ion beam to be higher than 100 MeV/nucleon. To accomplish this requirement, the following two ring cyclotrons have been adopted as post-accelerators of the existing RIKEN ring cyclotron (RRC): a 4-sector ring cyclotron for the first stage (IRC) and a 6-sector superconducting ring cyclotron for the second stage (SRC). The sector magnet of the SRC has to be flexible enough to generate isochronous fields in a wide range of energies and for various q/A values. In this report we describe the isochronous field generation and orbit analysis of the SRC.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"7 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":"114020655","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
Beam loss due to the charge exchange with the residual gas in the FLNR heavy ion cyclotrons FLNR重离子回旋加速器中电荷与残余气体交换引起的束流损耗
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753290
G. Gulbekian, M.N. El-Shazlyh, A. Tikhomirov, B. Gikal
{"title":"Beam loss due to the charge exchange with the residual gas in the FLNR heavy ion cyclotrons","authors":"G. Gulbekian, M.N. El-Shazlyh, A. Tikhomirov, B. Gikal","doi":"10.1109/PAC.1997.753290","DOIUrl":"https://doi.org/10.1109/PAC.1997.753290","url":null,"abstract":"A simulation program was developed to calculate the pressure distribution and the beam loss due to the charge exchange cross section in the FLNR heavy ion cyclotrons. A series of measurements was carried out to evaluate the beam loss. These measurements and the pressure distributions were compared with the program results.","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":"114690495","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 measurements of a traveling wave muffin-tin accelerating structure at 90 GHz 90 GHz下行波松饼加速结构的射频测量
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749801
P. Chou, G. Bowden, M. Copeland, H. Henke, A. Menegat, D. Pritzkau, R. Siemann
{"title":"RF measurements of a traveling wave muffin-tin accelerating structure at 90 GHz","authors":"P. Chou, G. Bowden, M. Copeland, H. Henke, A. Menegat, D. Pritzkau, R. Siemann","doi":"10.1109/PAC.1997.749801","DOIUrl":"https://doi.org/10.1109/PAC.1997.749801","url":null,"abstract":"A measuring system at the table-top scale was developed for RF measurements of a muffin-tin accelerating structure operating at 32 times the SLAC frequency (2.856 GHz). Both perturbation and nonperturbation methods are employed to characterize the RF properties of a muffin-tin structure. Conventional bead pull measurements are extended to millimeter wavelengths. Design of the measuring system and preliminary results of RF measurements are presented.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"44 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":"114831313","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
Electron gun and collector design for 94-GHz gyro-amplifiers 94 ghz陀螺放大器电子枪和集电极设计
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753148
K. Nguyen, B. Danly, B. Levush, M. Blank, R. True, K. Felch, P. Borchard
{"title":"Electron gun and collector design for 94-GHz gyro-amplifiers","authors":"K. Nguyen, B. Danly, B. Levush, M. Blank, R. True, K. Felch, P. Borchard","doi":"10.1109/PAC.1997.753148","DOIUrl":"https://doi.org/10.1109/PAC.1997.753148","url":null,"abstract":"This paper presents the electrical design of the magnetron injection gun and collector for high average power TE/sub 01/ gyro-amplifiers. Both the gun and collector are currently under construction.","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":"126202611","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: 45
Backward traveling wave electron linac 反向行波电子直线加速器
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.749980
Chen Huai-bi, Huang Yuanzhong, L. Yuzheng, Tong Dechun, D. Xiaodong
{"title":"Backward traveling wave electron linac","authors":"Chen Huai-bi, Huang Yuanzhong, L. Yuzheng, Tong Dechun, D. Xiaodong","doi":"10.1109/PAC.1997.749980","DOIUrl":"https://doi.org/10.1109/PAC.1997.749980","url":null,"abstract":"Future electron linacs will require high gradient acceleration. This paper studies the high shunt impedance backward traveling wave electron linac accelerating structure (BTW). Experiments were performed to prove the feasibility of the BTW structure.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"2016 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":"128054509","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
An embedded power supply controller 嵌入式电源控制器
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753243
S. Sharonov, J. Nogiec
{"title":"An embedded power supply controller","authors":"S. Sharonov, J. Nogiec","doi":"10.1109/PAC.1997.753243","DOIUrl":"https://doi.org/10.1109/PAC.1997.753243","url":null,"abstract":"Several different models of high current power supplies are used to test accelerator magnets at the Fermilab's Development and Test Department (D&TD). Department-wide standardization of current control and monitoring has been achieved by embedding a proprietary intelligent device into each of these power supplies. The device is based on a highly integrated Intel 87C196 microcontroller that is used to control and monitor current, collect status information, issue control signals and communicate with a host computer. The controller interfaces with a power supply via onboard high precision ADC and DAC converters, and digital I/O registers. Some of the advanced features of the system include: downloading and interpreting of complex ramp profiles, built-in parabolic waveform approximation, external triggering, and fiber-optic communication media. Network access is enabled by an extensive set of UNIX tools such as GUI, ramp profile simulator, API library, and shell programming tools.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"641 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":"121984591","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
Stabilization of the spectral intensity fluctuations with the higher order mode frequency tuners 用高阶模频率调谐器稳定谱强度波动
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.750785
Ch. E. Wang, L. Chang, S.S. Chang, Y.I. Chang, C. Kuo, C. Lai, W. Lau, M. Lin, S.J. Lin, G. Luo, T.T. Yang
{"title":"Stabilization of the spectral intensity fluctuations with the higher order mode frequency tuners","authors":"Ch. E. Wang, L. Chang, S.S. Chang, Y.I. Chang, C. Kuo, C. Lai, W. Lau, M. Lin, S.J. Lin, G. Luo, T.T. Yang","doi":"10.1109/PAC.1997.750785","DOIUrl":"https://doi.org/10.1109/PAC.1997.750785","url":null,"abstract":"A strong excitation of the longitudinal coupled-bunch instabilities, which is suspected to be driven by the TM/sub 011/-like mode of the DORIS-I cavities, was observed at the higher electron beam current in the storage ring of SRRC. Such instability leads to heavy fluctuations of the photon beam intensity in the horizontal plane and therefore restricted the maximal useful beam current for the user experiments. This restriction has been released by replacing the damping antennae with the additional tuners. Here, we report our experiences after one-year routine operations of the main RF cavities with the second tuners at SRRC.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"53 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":"122248155","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
Waveguide stub-line tuning of RF cavities with heavy beam loading 重波束负载射频腔的波导短线调谐
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) Pub Date : 1997-05-12 DOI: 10.1109/PAC.1997.753098
P. Krejcik
{"title":"Waveguide stub-line tuning of RF cavities with heavy beam loading","authors":"P. Krejcik","doi":"10.1109/PAC.1997.753098","DOIUrl":"https://doi.org/10.1109/PAC.1997.753098","url":null,"abstract":"A method is proposed for using adjustable, waveguide stub-line tuners to match the load impedance of the cavity plus beam to the power source, without the need to detune the cavity. Adjustable stub-line tuners are shown to be able to completely match the resistive and reactive parts of the load impedance to a generator under all conditions of beam loading, ensuring optimum power transfer between generator and cavity. This technique may have advantages in high-current storage rings such as the SLC damping rings and the new PEP II storage rings. The coupled-bunch instability driven by the fundamental mode of the cavity is re-appraised in this coupling scheme in which the cavity is no longer detuned. The consequences of this matching scheme are also considered for the beam loading stability limit.","PeriodicalId":122662,"journal":{"name":"Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)","volume":"28 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":"127900583","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: 8
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