Design and measurement of signal processing system for cavity beam position monitor  

作　　者：WANG Baopeng LENG Yongbin YU Luyang ZHOU Weimin YUAN Renxian CHEN Zhichu 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Jiading campus [2]University of the Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2013年第2期1-6,共6页核技术（英文）

基　　金：Supported by National Natural Science Foundaion of China(No.11075198)

摘　　要：In this paper,in order to achieve the output signal processing of cavity beam position monitor(CBPM),we develop a digital intermediate frequency receiver architecture based signal processing system,which consists of radio frequency(RF) front end and high speed data acquisition board.The beam position resolution in the CBPM signal processing system is superior to 1μm.Two signal processing algorithms,fast Fourier transform(FFT) and digital down converter(DDC),are evaluated offline using MATLAB platform,and both can be used to achieve,the CW input signal,position resolutions of 0.31μm and 0.10μm at -16 dBm.The DDC algorithm for its good compatibility is downloaded into the FPGA to realize online measurement,reaching the position resolution of 0.49μm due to truncation error.The whole system works well and the performance meets design target.In this paper, in order to achieve the output signal processing of cavity beam position monitor （CBPM）, we develop a digital intermediate frequency receiver architecture based signal processing system, which consists of radio frequency （RF） front end and high speed data acquisition board. The beam position resolution in the CBPM signal processing system is superior to 1 ktm. Two signal processing algorithms, fast Fourier transform （FFT） and digital down converter （DDC）, are evaluated offiine using MATLAB platform, and both can be used to achieve, the CW input signal, position resolutions of 0.31 μm and 0.10 μm at -16 dBm. The DDC algorithm for its good compatibility is downloaded into the FPGA to realize online measurement, reaching the position resolution of 0.49 lain due to truncation error. The whole system works well and the performance meets design target.

关 键 词：信号处理系统 位置分辨率 在线测量 设计目标 显示器 光束 MATLAB平台 信号处理算法 

分 类 号：TN911.7[电子电信—通信与信息系统] TP316[电子电信—信息与通信工程]