合肥光源光开关系统的研制

 合肥光源的运行模式是多束团运行模式，光开关系统可以从多束团中选取单个束团提供给条纹相机测量和研究。由于条纹相机光阴极易损坏，光开关系统的使用，极大地降低了输入光功率，有效地保护了光阴极。介绍了光开关的工作原理，根据合肥光源光脉冲的波长、重复频率、束团尺寸以及束团长度，进行了光开关系统设计。介绍了电光调制器的特性、高压驱动单元和高速同步分频器的性能、系统准直和调试过程，并给出了示波器和条纹相机的测量结果。

Development of optical shutter system in Hefei Light Source

The filling pattern is multi-bunch in Hefei Light Source (HLS). The optical shutter can pick single bunch from multi-bunch for streak camera system to measure, and thus largely reduces the power of input light and protects the vulnerable photocathode of streak camera effectively. The principle of the optical shutter system is presented, and a system is designed according to the wavelength and repetition frequency of light pulse, and the dimension and length of bunches in HLS. The characteristics of electro-optic modulator (EOM), high voltage driver and high speed synchronous divider are presented. The alignment and debugging of the system are introduced, and the measurements using oscilloscope and streak camera are presented.