摘要
研制了数字低电平系统(DLLRF)替换了合肥光源(HLS)原模拟系统,实现储存环高频腔的频率调谐和高频加速场的快速幅相反馈控制。该系统主要由模拟信号变频和基于FPGA的数字处理两大功能模块构成。经过离线和在线调试,DLLRF闭环控制下高频场的无载幅相稳定度达到±0.1%和±0.1°。带束流运行后进一步优化了环路参数,储存环最高流强达到460 m A,并成功实现了300 m A TOP-OFF运行模式,高频场的载束幅相稳定度达到±0.2%和±0.2°。
The Digital Low Level RF system（ DLLRF） which consists of frequency converting module and FPGA digital processing module,is developed to realize the RF cavity tuning and AP feedback control of the cavity field in the HLS Phase III upgrade project. After the off-line and on-line adjusting of DLLRF system,the unloaded amplitude and phase stability of the cavity field are attained to ± 0. 1% and ± 0. 1° respectively. By optimizing the DLLRF parameters with beam loading,the maximum beam current of 460 m A is accumulated in the storage ring,the 300 m A TOP-OFF operation is implemented,and the beam-loaded amplitude and phase stability of ± 0. 2% and ± 0. 2° are achieved.
出处
《核电子学与探测技术》
CAS
北大核心
2015年第6期617-620,共4页
Nuclear Electronics & Detection Technology
基金
国家同步辐射实验室重大改造工程项目资助
