单次通过型束流位置探测器的束流位置测量方法  

Measurement method for beam position of single passbeam position monitor

作　　者：刘佳阳 麻惠洲[1] 杜垚垚[1] 叶强[1] 刘智 曹建社[1] 岳军会[1] 高国栋 唐旭辉 随艳峰[1,2] 魏书军 Liu Jiayang;Ma Huizhou;Du Yaoyao;Ye Qiang;Liu Zhi;Cao Jianshe;Yue Junhui;Gao Guodong;Tang Xuhui;Sui Yanfeng;Wei Shujun(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2023年第12期106-113,共8页High Power Laser and Particle Beams

摘　　要：针对当前单次通过型数字束流位置探测器(BPM)有效采样点数少、数据信噪比低、测量分辨率差的问题,提出了一种基于“束流单次通过”的数字BPM测量改进算法。该算法通过模拟信号的功分-延迟-合成,增加了有效采样数据,并通过采样数据的截取与数据拼接、数字滤波等数据处理方式,提高了采样数据的信噪比,并最终实现了BPM测量分辨率的提高。实验结果表明,该算法在不改变模数转换器(ADC)采样率的情况下,将单次通过型BPM的测量分辨率提高了约2倍。该测量方法为提高单次通过型BPM的测量分辨率提供了一种新的解决方案,已成功应用于北京正负电子对撞机(BEPCII)和高能同步辐射光源(HEPS)直线加速器项目中。Due to the low effective sampling points,low data signal-to-noise ratio(SNR),and lowermeasurement resolution in the current single-pass digital Beam Position Monitor(BPM),a digital BPM measurementimprovement algorithm for“beam single-pass”case is proposed.This algorithm enhances the effective samplingpoints by employing the“power division-delay-synthesis”technique for the analog signal.It improves the SNR of thesampling data through various data processing techniques,including data truncation,data concatenation,and digitalbandpass filtering(BPF).Consequently,the resolution of the BPM is significantly enhanced.Experimental resultsdemonstrate that this algorithm improves the measurement accuracy of the single-pass BPM by approximately twotimes without increasing the Analog-to-Digital Converter(ADC)sampling rate.The measurement method studied inthis paper presents a novel solution for enhancing the measurement resolution of the single-pass BPM and has beensuccessfully implemented in the Beijing Electron Position Collider II(BEPCII)and High Energy Photon Source(HEPS)linear accelerator projects.

关 键 词：单次通过型束流位置探测器 模拟信号延迟 有效采样数据 数字带通滤波 分辨率 

分 类 号：TL506[核科学技术—核技术及应用]