摘要
DC SC超导光阴极注入器将直流光阴极电子枪和超导加速腔结合在一起 ,其特点之一是适合于提供高平均流强电子束 .文中介绍了直流光阴极电子枪的驱动激光系统的研制 .该驱动激光系统的主机为瑞士TBP公司的GE 10 0 XHP型激光器 ,是采用可饱和吸收镜技术的被动锁模激光器 ,其工作晶体为Nd :YVO4 ,输出波长为 10 6 4nm ,脉冲重复频率为 81.2 5MHz ,平均功率 10W .该驱动激光系统配套的CLX 110 0同步控制器可以将激光脉冲与射频参考信号严格锁定 ,随机抖动不大于 1ps .根据使用要求 ,作者研制了高效的激光倍频器 ,获得了大于 1W的 2 6 6nm紫外激光 .同时 ,激光到光阴极的传输设计中 ,采用了傅立叶光学技术 ,在紫外激光功率 6 5 0mW左右的条件下 ,从自行研制的Cs2 Te光阴极上实现了大于 5 0 0
The precept of DC-SC photoinjector is to combine a DC photoca thode electron gun and the superconducting cavity together.This scheme is specially adequate to provide the high average beam current.In this paper,authors have described the drive laser system for the DC SC photoinjector of PKU version.This system is mainly composed of GE 100 XHP laser,a passive mode locked Nd:YVO 4 laser,CLX 1100 timing controller from TBP,Switzerland,self developed high efficiency SHG and FHG and laser beam transmission system.After experimental test,the laser power of 266nm is more than 1 W,the jitter between laser pulses and the RF reference signal is less than 1 ps.By use of this laser system,we have observed more than 500μA electron current from Cs 2Te cathode.
出处
《高能物理与核物理》
CSCD
北大核心
2004年第8期881-884,共4页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金 (10 2 990 2 1)
国家 973项目 (2 0 0 2CB713 60 2 )资助~~
