数字锁相检测在合肥光源逐圈测量系统的应用
Application of digital lock-in detection to Heifei Light Source turn-by-turn system
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摘要: 从其原理出发,分析了数字锁相检测在逐圈束流位置测量系统中用于束流振荡阻尼率（增长率）计算的可行性，并在Matlab中对其进行了仿真计算。将该方法应用到合肥光源逐圈测量系统中，进行了Beta振荡的增长和阻尼时间的计算，结果显示振荡增长时间约为0.26 ms，阻尼时间为1.2 ms（反馈系统调试时）。仿真和实验结果都表明，数字锁相检测可以有效用于逐圈测量系统中阻尼率的计算。Abstract: This paper introduces the digital lock-in detection theory and discusses its feasibility to obtain the damping rate in turn-by-turn measurement systems. Numerical simulations of this method were carried out with Matlab. Then principle presenting beam experiments were conducted on the Heifei Light Source(HLS) storage ring. The measured beta oscillation growth time is about 0.26 ms and the damping time is about 1.2 ms. Simulation and experimental results show that, the digital lock-in detection method is effective in damping rate measurement in turn-by-turn measurement systems.
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