摘要
上海同步辐射光源(Shanghai Synchrotron Radiation Facility,SSRF)目前正在进行二期线站工程建设,其中基于时间分辨的泵浦实验是线站工程的重要目标之一。高时间分辨率实验对于束团纯度的要求达到10^(-5)量级以上,纯度测量是关键技术之一。然而传统基于束流位置测量探头的逐束团电荷量测量系统分辨率仅能到10−4量级。基于时间相关单光子计数技术,在原有同步光诊断线上建立了束团纯度在线测量系统。为了验证和提高系统的性能,设计了评估实验,同时对系统进行了优化。测试结果表明:搭建的束团电荷量纯度测量系统,分辨率在分钟量级可达到10^(−7)量级。利用系统的高时间和纯度测量分辨率能力的优势,进行了束团纵向分布测量应用的探索,并对储存环的填充模式对束团纯度的影响进行了研究。
[Background]The phase-Ⅱ beam line project is currently under construction at Shanghai synchrotron radiation facility(SSRF),and one of its important goals is to have the ability of pumping experiments with high time resolution.High time resolution experiments require the purity of the probe bunch to reach the order of 10^(-5).However,the traditional bunch-by-bunch charge measurement based on the beam position monitor has a resolution of only 10^(-4).[Purpose]This study aims to propose and implement a bunch purity measurement system for high time resolution at SSRF.[Methods]Based on the time-correlated single-photon counting technology,a bunch purity monitor was developed and installed on the diagnostic beam line of SSRF.An evaluation experiment was designed to verify its performance and optimize this bunch purity measurement system.[Results]The experimental results show that the resolution of the new bunch purity monitor can reach to 10^(-7) in a few minutes.[Conclusion]The new bunch purity measurement system is applicable to measuring the longitudinal distribution of electron bunches,and studying the effect of filling patterns on purity.
作者
高波
赖龙伟
刘晓庆
曹珊珊
冷用斌
GAO Bo;LAI Longwei;LIU Xiaoqing;CAO Shanshan;LENG Yongbin(Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China)
出处
《核技术》
CAS
CSCD
北大核心
2021年第3期1-6,共6页
Nuclear Techniques
基金
中国科学院青年创新促进会(No.2019290)
上海光源线站工程资助。
关键词
时间分辨实验
束团纯度测量
束团电荷量测量
Bunch purity monitor
Time-correlated single-photon counting
Bunch charge measurement
