Electron Beam Spectrum Diagnostics with Optical Transition Radiation on the Beijing Free-Electron Laser

作     者：李泉凤 吴频 高建江 吴刚 

作者机构：Department of Engineering Physics Tsinghua University Beijing 100084 China Beijing Free-Electron Laser Laboratory Institute of High Energy Physics Beijing 100084 China 

出 版 物：《Tsinghua Science and Technology》 (清华大学学报（自然科学版（英文版）)

年 卷 期：2004年第9卷第2期

页      面：246-248页

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：Supported by the National Natural Science Foundation of China (No. 19875029) 

主　　题：optical transition radiation beam diagnostics energy spectrum 

摘      要：A measurement system was developed to measure the electron beam spectrum of the Beijing free-electron laser based on the optical transition radiation (OTR). This paper describes the system, which consists of a 32-channel high resolution of 0.02% OTR detector, especially the spectrometer. The OTR an-gular-distribution pattern at the focal plane has two apexes, but the two apexes are smoothed out due to the electron beam energy distribution. The energy spectrum can be measured if the magnet energy resolution is higher than 0.7% to distinguish the electron beam energy distribution.