恒流模式直流流强检测系统的优化  

Optimization of DCCT system on top-up operation mode

作　　者：熊云[1,2] 阎映炳[1] 冷用斌[1] 易星[1,2] 赖龙伟[1,2] 王宝鹏[1,2] 张宁[1,2] 陈之初[1,2] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《核技术》2012年第2期81-86,共6页Nuclear Techniques

基　　金：国家自然科学基金(11075198)资助

摘　　要：介绍了上海光源恒流模式下直流流强检测系统的软硬件结构。Matlab仿真比对两种束流流强算法性能,结果表明,使用整数周期算术平均算法时,2 Hz系统带宽下系统直流流强测量分辨率可望好于0.38μA。由于Top-up模式束流的特性,对束流寿命算法进行优化,进行两点曲线拟合。介绍了Top-up模式下直流流强检测系统的置信度算法,并用实测数据进行了验证,数据预测准确,收敛速度快,性能较好。对DCCT系统的软件实现给出了软件流程图,指导软件代码的实现。In this paper, we report our work on the software and hardware architecture of the DCCT system for SSRF where top-up mode is being used. Matlab is used to simulate two methods of beam current calculation. The system resolution of the DC current measurement with 2 Hz system bandwidth could he better than 0.38 pA when arithmetic mean of whole cycle algorithm is applied. The beam lifetime calculation algorithm is optimized to use two points in the curve fitting procedure based on the characters of the top-up mode, The algorithm of finding the confidence level is also discussed and is verified to be accurate in data prediction as well as fast in convergence by using the practical data fetched in the laboratory. The flow chart of the software layer is given to show how the code is implemented.

关 键 词：束流流强 束流寿命 数据预测算法 直流流强检测系统 恒流模式 上海光源 

分 类 号：TN911.72[电子电信—通信与信息系统]