上海光源逐束团数据采集系统研制

为进一步提升光源性能,需要对加速器非线性束流动力学问题、宽带束流阻抗问题、恒流模式下注入脉冲引入的束流位置扰动问题进行研究,从而优化新增设备阻抗、优化束团填充模式、优化注入模式,提高不稳定性流强阈值。而逐束团诊断技术的研究,是达成上述目标的技术基础。上海光源研制了一套逐束团数据采集系统,该系统主要由RF前端、数据采集卡和EPICS软件三部分组成。RF前端将束团信号展宽到2ns,利用四路采样率为125MHz的ADC组成等效的500MHz逐束团采样,利用EPICS实现后续信号处理。在线测试结果表明,系统可准确检测逐束团位置信息,并可获得逐束团工作点,为机器研究提供了有力手段。...

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Published in核技术 Vol. 36; no. 12; pp. 1 - 6
Main Author 杨桂森 冷用斌 赖龙伟 俞路阳 袁任贤 阎映炳
Format Journal Article
LanguageChinese
Published 中国科学院大学 北京100049%中国科学院上海应用物理研究所 嘉定园区 上海201800 2013
中国科学院上海应用物理研究所 嘉定园区 上海201800
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ISSN0253-3219

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Summary:为进一步提升光源性能,需要对加速器非线性束流动力学问题、宽带束流阻抗问题、恒流模式下注入脉冲引入的束流位置扰动问题进行研究,从而优化新增设备阻抗、优化束团填充模式、优化注入模式,提高不稳定性流强阈值。而逐束团诊断技术的研究,是达成上述目标的技术基础。上海光源研制了一套逐束团数据采集系统,该系统主要由RF前端、数据采集卡和EPICS软件三部分组成。RF前端将束团信号展宽到2ns,利用四路采样率为125MHz的ADC组成等效的500MHz逐束团采样,利用EPICS实现后续信号处理。在线测试结果表明,系统可准确检测逐束团位置信息,并可获得逐束团工作点,为机器研究提供了有力手段。
Bibliography:YANG Guisen LENG Yongbin LAI Longwei YU Luyang YUAN Renxian YAN Yingbing 1 (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
31-1342/TL
Bunch by bunch, Data acquisition, RF front end, Equivalent sampling, Bunch position
Background: In order to improve the synchrotron performance in the constant current mode, attentions should be paid to problems such as non-linear beam dynamics, broadband beam impedance, and position disturbance, etc. Purpose: To address these problems, a bunch by bunch data acquisition system (BBDAQ) is implemented for real-time bunch position monitoring, as well as the off-line data analysis for the Shanghai Synchrotron Radiation Facility (SSRF) storage ring. It can be applied to optimize new equipment impedance, filling pattern, injection mode, and raise threshold value of current instability. Methods: This BBDAQ developed at SSRF consists a RF front end to filter and
ISSN:0253-3219