| BEPC横向阻尼时间的测量 |
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| 引用本文： | 张磊,焦毅,王九庆,岳军会,曹建设,马力,王筠华,郑凯,杨永良.BEPC横向阻尼时间的测量[J].强激光与粒子束,2006,18(2):273-276. |
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| 作者姓名： | 张磊 焦毅 王九庆 岳军会 曹建设 马力 王筠华 郑凯 杨永良 |
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| 作者单位： | 1. 中国科学院 高能物理研究所, 北京 100049； 2. 中国科学技术大学 国家同步辐射实验室, 合肥 230029 |
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| 基金项目： | 中国科学院资助项目;HLS多束团不稳定性实验监测和理论研究项目 |
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| 摘 要： | 利用逐束团测量系统在BEPC储存环中跟踪单个束团得到其多圈位置振荡信息，获得BEPC储存环的横向阻尼时间与束流流强、色品、八极子和束流能量的关系，并通过分析得到了BEPC储存环辐射阻尼时间为52 ms。实验结果表明：流强越高、色品越大，阻尼率也就越大；束流流强为4.7 mA时八极子强度的变化对阻尼率没有影响；束流流强为5 mA时，阻尼率随束流能量升高而减小。
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| 关 键 词： | 逐束团测量系统 阻尼时间 色品 位置振荡 |
| 文章编号： | 1001-4322(2006)02-0273-04 |
| 收稿时间： | 2005-10-18 |
| 修稿时间： | 2005-12-26 |
Measurement of transverse damping time on BEPC |
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| ZHANG Lei,JIAO Yi,WANG Jiu-qing,YUE Jun-hui,CAO Jian-she,MA Li,WANG Jun-hua,ZHENG Kai,YANG Yong-liang.Measurement of transverse damping time on BEPC[J].High Power Laser and Particle Beams,2006,18(2):273-276. |
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| Authors: | ZHANG Lei JIAO Yi WANG Jiu-qing YUE Jun-hui CAO Jian-she MA Li WANG Jun-hua ZHENG Kai YANG Yong-liang |
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| Institution: | 1. Institute of High Energy Physics, Chinese Academy of Sciences, P.O.Box 918-10, Beijing 100049, China;2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, P.O.Box 6022, Hefei 230029, China |
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| Abstract: | In BEPC,the oscillation information of beam position of a single bunch in every turn can be tracked by the bunch-by-bunch system.Through which,the relationships between the trabsverse damping time and the beam current,chromaticity,octupole current and beam energy were obtined,and the rodiation damping time acquired in the experiment was 52 ms.The data analysis result of the bunch-by-bunch tracking experiment mdicates: the higher the beam current is and the higher the chromaticity is damping is,the change of the octupole current has no impact on the damping rate when the beam current is 4.7 mA.The damping rate decreases with the rising of the beam energy when the beam current is 5 mA. |
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| Keywords: | Bunch-by-bunch system Damping time Chromaticity Position oscillation |
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