新型跑道腔式束流位置监测器

罗箐; 孙葆根; 何多慧; 卢平; 王晓辉; 方佳

强激光与粒子束, 2010, 22 (7): 1635, 网络出版: 2010-09-15

新型跑道腔式束流位置监测器

Beam position moniter with racetrack cavity

论文大纲

罗箐 ^*孙葆根何多慧卢平王晓辉方佳

作者单位

中国科学技术大学国家同步辐射实验室, 合肥 230029

束流位置监测器跑道型腔串扰偶极模分辨力 beam position moniter racetrack cavity cross-talk dipole mode resolution

摘要

系统提出了一种新的腔式束流位置监测器(BPM), 即跑道型腔式BPM, 并使用微波工作室软件进行了理论研究和模拟计算, 提出了通用设计方法。跑道型腔式BPM的金属腔部分具有跑道形横截面, 引出束流位置偏移激励起的一对偶极模式作为束流位置信号。该方案的偶极模式极化方向固定, 频率分离, 可以解决随机误差产生的横向串扰问题, 其理论位置分辨力可以达到15 nm。

Abstract

A new high brightness injector based on a new photocathode RF electron gun is planned to be installed at Hefei light source. To get high quality electron bunch, precise control of beam position is required. The positional resolution of the beam position monitor(BMP) system designed for RF electron gun should be higher than 10 μm. A new type of cavity BPM with racetrack cavity is designed. The racetrack cavity is a cavity with a racetrack cross section, so that it has a pair of dipole modes with different resonant frequency and fixed polarization direction. The cross-talk problem is then solved. The 3D model of the cavity is simulated in MWS, and the theoretical performance of racetrack BPM and the optimization method are analysed. The theoretical resolution of racetrack cavity BPM can be 15 nm.

参考文献

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罗箐, 孙葆根, 何多慧, 卢平, 王晓辉, 方佳. 新型跑道腔式束流位置监测器[J]. 强激光与粒子束, 2010, 22(7): 1635. Luo Qing, Sun Baogen, He Duohui, Lu Ping, Wang Xiaohui, Fang Jia. Beam position moniter with racetrack cavity[J]. High Power Laser and Particle Beams, 2010, 22(7): 1635.

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