用于HLS单束团运行模式的高频剔除系统
RFKO system for single-bunch operation of Hefei liglit source
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摘要: 介绍了主要用于实现合肥光源单束团运行模式的高频剔除（RFKO）系统。该系统完全基于仪器设备(分频器、波形发生器、宽带放大器和具有I/Q调制功能的矢量信号发生器)，无任何专门设计的电子线路。高频剔除的原理是激励粒子横向振荡而丢失。激励信号产生的过程是：将取自储存环高频系统的信号进行分频，得到束团同步信号；用束团同步信号触发波形发生器，生成窄脉冲；该窄脉冲调制信号发生器，输出高频剔除信号，放大后加在条带电极上，进行束团剔除。目前获得了18 mA的单束团最高流强。改变分频数和脉冲长度，可得到其它一些周期性填充模式，其中3串6束团以及非均匀填充模式得到了实验验证。Abstract: A new RFKO（RF Knock Out） system for partial filling operation is in commission at the Hefei liglit source storage ring. This system is composed of a frequency divider, waveform generator, vector signal source and wideband amplifier. The in-phase signal of beam bunch is obtained by dividing the reference signal from the storage ring's RF system. Triggered by the in-phase signal, the waveform generator outputs a pulse burst. Modulated by the pulse, the waveform generator produces the RFKO signal, and the RFKO signal is applied to the strip line after amplification. The single bunch operation is achieved in this way and the current has reached 18 mA at present. Some bunch-train patterns such as 3-train with 6-bunch and non-uniform bunch train are also tested.
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Key words:
- filling pattern /
- single-bunch /
- rfko /
- hefei light source(hls)
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