合肥光源逐圈测量系统定标及其应用

Calibration of Turn-by-Turn System of HLS and Its Application

介绍合肥光源 (HLS)逐圈测量系统和工作在 4 0 8MHz的对数比率电子学处理系统的原理和性能 .利用逐圈测量系统可以测量HLS储存环的Damping率、注入效率、Beta振荡、v值瞬时变化等 ,以此研究束流不稳定性 ,为机器稳定高性能运行提供了一个强有力的测试手段 .在系统的设计中 ,选择了新近受到广泛重视的对数比电路完成位置信号处理 .它不仅具有宽的动态范围和带宽以及好的线性度 ,而且造价低廉易实现 .本文重点介绍了HLS逐圈测量系统的在线定标、灵敏度和它在升级后新注入调试中的重要应用 .实践证明 ,该系统对新注入系统的调整是相当有用的 .它是开展储存环的非线性动力学研究 ,观察动力学孔径不可缺少的设备 .

In this paper, the turn-by-turn system of Hefei Light Source (HLS), and the log-ratio electronics circuit with working frequence 408MHz (2*RF of HLS) are described. They are used to monitor the injection effectiveness, damping rate, β oscillation and v variation for research the instability of beam. The Log-ratio signal processor has low noise, high bandwidth and wide dynamic range, as well as linear response. The calibration of the system and its application in commissioning of the upgraded injection system of HLS is emphases. The practice proves the turn-by-turn BPM system is quite useful for the beam-injection adjusting and indispensable for machine research.