激光探针在“强光一号”Z箍缩实验中的初步应用

Laser Probing for Wire Array Z-Pinches on Qiangguang Generator

介绍了"强光一号"Z箍缩激光探针光路的设计及搭建、激光器光源品质优化、激光器触发系统设计及与加速器同步调试等,并利用初步建立的激光探针对平面型W丝阵和Al丝阵Z箍缩过程进行了诊断。结果表明:激光探针能够反映出Z箍缩各阶段的典型特征,包括熔蚀不均匀性、亚毫米级准周期调制结构、内爆过程不稳定性、滞止阶段拖尾等。指出了现有激光探针系统需要改进的环节,包括激光器触发、探针图像记录、条纹数据定量分析等。

This paper describes a laser probing system for wire array Z-pinches established on Qiangguang facilityincluding design of the laser optical systemthe improvement on the quality of the laser sourceand the synchronizer triggering system for laser source and the facility.The system has been applied in Z-pinch experiments of aluminum and tungsten pla-nar wire arrays.The experimental results show that the typical characteristics of Z-pinch loads in different phase can be exactly recorded by the laser probing systemsuch as the non-uniform erosion of the wiresthe quasi-periodic modulation structure with submilimeter scale wavelengththe instability during the implosionand the tail mass distribution in the stagna-tion.The further research and improvements should be carried out on the triggering systemrecording system and quantitative analysis of the streak.