Research into the sampling methods of digital beam position measurement

作     者：邬维浩 赵雷 陈二雷 刘树彬 安琪 WU Wei-Hao;ZHAO Lei;CHEN Er-Lei;LIU Shu-Bin;AN Qi

作者机构：State Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2015年第26卷第3期

页      面：71-76页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：Supported by the Knowledge Innovation Program of the Chinese Academy of Sciences(No.KJCX2-YW-N27) National Natural Science Foundation of China(Nos.11205153 and 11175176) 

主　　题：采样方法 位置测量 数字波束 上海同步辐射装置 束流位置监测系统 位置分辨率 试验比较 抽样方法 

摘      要：A fully digital beam position monitoring system(DBPM) has been designed for SSRF(Shanghai Synchrotron Radiation Facility). As analog-to-digital converter(ADC) is a crucial part in the DBPM system, the sampling methods should be studied to achieve optimum performance. Different sampling modes were used and compared through tests. Long term variation among four sampling channels, which would introduce errors in beam position measurement, is investigated. An interleaved distribution scheme was designed to address this issue. To evaluate the sampling methods, in-beam tests were conducted in SSRF. Test results indicate that with proper sampling methods, a turn-by-turn(TBT) position resolution better than 1 μm is achieved, and the slow-acquisition(SA) position resolution is improved from 4.28 μm to 0.17 μm.