强激光与粒子束2013，Vol.25Issue(2)：461-464,4.DOI:10.3788/HPLPB20132502.0461
基于束流位置探测器的束团长度测量
Bunch length measurement based on beam position monitor
王建新 1黎明 1王汉斌 1李鹏 1吴岱1
作者信息
- 1. 中国工程物理研究院应用电子学研究所,四川绵阳621900
- 折叠
摘要
Abstract
The electron beam of high average power Free Electron Laser Terahertz scientific research device in Chinese A-cademy of Engineering Physics (CAEP) has the characteristic of high average current. Non-destructive measurement technique is required for the measurement of the beam parameters. The beam position monitor (BPM) is one of the basic measurement instruments. The method of extracting the signal spectrum of the BPM to obtain the bunch length is simple and can be used as a supplement or replacement of other bunch length measurement methods. This paper analyzes the frequency domain characteristics of the driving electron beam bunches, and analyzes the theoretical basement of the bunch length measurement based on the BPM. 3D simulation program was used for the numerical simulation of BPM transfer impedance modeling, the bunches of different length were measured and calculated, and the impact of the bunch's off-center position in the vacuum pipe on the bunch length measurements was also analyzed. The study results show that when the bunch length varies from 10 ps to 100 ps, all the measurement error is less than 2 % , which meets the requirements of CAEP-THz-FEL operation.关键词
束团长度/束流位置探测器/频谱/传输阻抗Key words
bunch length/ beam position monitors spectrum/ transfer impedance分类
能源科技引用本文复制引用
王建新,黎明,王汉斌,李鹏,吴岱..基于束流位置探测器的束团长度测量[J].强激光与粒子束,2013,25(2):461-464,4.
