| 纵向束流反馈冲击器优化设计 |
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| 引用本文： | 吴宝栋,黄文会,黄刚,周德民,唐传祥.纵向束流反馈冲击器优化设计[J].清华大学学报(自然科学版)网络.预览,2007(9). |
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| 作者姓名： | 吴宝栋 黄文会 黄刚 周德民 唐传祥 |
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| 作者单位： | 清华大学工程物理系 北京100084(吴宝栋，黄文会，黄刚，唐传祥)，中国科学院高能物理研究所 北京100039(周德民) |
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| 基金项目： | 国家自然科学基金资助项目(10375035、10375076) |
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| 摘 要： | 纵向束流反馈冲击器是纵向束流反馈系统的关键部件之一。由于北京正负电子对撞机(BEPC)的高频频率为500MHz,要求反馈系统的带宽不小于250MHz。在清华大学加速器实验室研制的纵向束流反馈冲击器模型腔的基础上,该文利用MAFIA等电磁场微波模拟程序对其进行优化设计,通过优化冲击器脊波导的脊缝宽度和角宽度,使冲击器带宽从210MHz增至260MHz。使用微波矢量网络分析仪测量了改造后冲击器的阻抗、散射参数和高次模,并与优化计算做了比较。改造后冲击器的中心频率、带宽和分流阻抗均满足设计要求。文中还对冲击器的高次模进行了分析和测量。
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| 关 键 词： | 反馈冲击器 束流不稳定性 带宽 分流阻抗 |
Optimization design of a longitudinal kicker for a Beam Feedback System |
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| Authors: | WU Baodong HUANG Wenhui HUANG Gang ZHOU Demin TANG Chuanxiang |
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| Institution: | WU Baodong1,HUANG Wenhui1,HUANG Gang1,ZHOU Demin2,TANG Chuanxiang1 |
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| Abstract: | The kicker is one of the key components in a longitudinal feedback system.A prototype cavity of a longitudinal feedback kicker was developed with a kicker bandwidth that had to be wider than 250 MHz to damp any coupled bunch modes in Accelerator Lab of Tsinghua University since the RF frequency of the driving accelerator was 500 MHz.The kicker cavity was modified with the MAFIA code to increase its bandwidth from 210 MHz to 260 MHz.Vector network analysis was used to measure the impedance and bandwidth of the modified kicker for comparison with simulation results.The central frequency,bandwidth,and shunt impedance of the modified kicker all achieved the design goals.Higher order modes in the kicker were also analyzed. |
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| Keywords: | kicker beam instability bandwidth shunt impedance |
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