逐圈测量系统定标和新近实验结果

Calibration of turn-by-turn system and new testing results

主要介绍了合肥光源储存环上,正在应用和改进中的逐圈测量系统的定标和灵敏度;比较和分析了利用该系统获得的储存环200MeV和800MeVdamping时间测量结果;在环注入调试中发现了束流积累限制的原因。它不仅可测到储存环的damping时间、beta振荡幅度和工作点瞬时变化,而且是研究抑制环的束流不稳定性和提高注入积累效率的重要测量手段。系统使用对数比电路完成位置信号处理,具有宽的动态范围和带宽以及好的线性度和稳定的运行性能,而且造价低廉,易实现。

This paper introduces the calibration and the sensitivity of the turn-by-turn system applied and improved on storage ring of Hefei Light Source (HLS). It pressents the results of the compare and analysis of the damping time at 200MeV and 800MeV by the data measured with the system. The causation to limit beam current accumulation is found in the injection beam monitoring. This system was not only used to measure the damping rate, β oscillation and υ change, but also to research the injecting effectiveness and beam instability. In design, the log-ratio electronics circuit with working frequency 408MHz (2×RF of HLS) was chosen to characterize machine properties of the HLS storage ring. The log-ratio signal processor has properties of low noise, wide bandwidth and wide dynamic range, as well as good linearity response.