A beam position measurement system of fully digital signal processing at SSRF

作     者：YAN Han ZHAO Lei LIU Shubin CHEN Kat WU Weihao AN Qi LENG Yongbin YI Xing YAN Yingbing LAI Longwei 

作者机构：State Key Laboratory of Particle Detection&ElectronicsUniversity of Science and technology of ChinaHefei230026China Anhui Key Laboratory of Physical ElectronicsDepartment of Modern PhysicsUniversity of Science and technology of ChinaHefei230026China Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800China 

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

年 卷 期：2012年第23卷第2期

页      面：75-82页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Supported by Knowledge Innovation Program of The Chinese Academy of Sciences (KJCX2-YW-N27) the National Natural Science Foundation of China (10875119) 100 Talents Program of The Chinese Academy of Sciences 

主　　题：上海同步辐射装置 位置测量系统 信号处理技术 光束 数字信号处理算法 现场可编程门阵列 位置敏感探测器 光源 

摘      要：This fully digital beam position measurement instrument is designed for beam position monitoring and machine research in Shanghai Synchrotron Radiation Facility. The signals received from four position-sensitive detectors are narrow pulses with a repetition rate up to 499.654 MHz and a pulse width of around 100 ps, and their dynamic range could vary over more than 40 dB in machine research. By the employment of the under-sampling technique based on high-speed high-resolution A/D conversion, all the processing procedure is performed fully by the digital signal processing algorithms integrated in one single Field Programmable Gate Array. This system functions well in the laboratory and commissioning tests, demonstrating a position resolution (at the turn by turn rate of 694 kHz) better than 7 μm over the input amplitude range of -40 dBm to 10 dBm which is well beyond the requirement.