单层钨丝阵Z箍缩内爆不稳定性特征实验研究  

Experimental study of implosion instability characteristics in imploding single tungsten wire array Z-pinches

作　　者：蒋树庆[1,2] 陈法新[1] 夏广新[1] 甯家敏[1] 薛飞彪[1] 李林波[1] 叶繁[1] 杨建伦[1] 潘英俊[2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]重庆大学光电技术及系统教育部重点实验室,重庆400044

出　　处：《强激光与粒子束》2013年第11期3069-3072,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11135007;11005096)

摘　　要：基于激光阴影像,研究了直径为8mm的钨丝阵在滞止阶段的不稳定性发展。实验结果表明,在消融阶段早期,不稳定性扰动的主导波长为0.2mm。在内爆后期和滞止阶段,不稳定主导波长迅速向长波长方向发展。在功率峰值前后,扭曲不稳定性特征开始出现,在滞止等离子体柱达到最小收缩直径后,辐射功率出现了明显下降。Experimental results of instability developments of 8 mm tungsten wire array Z-pinches on the 1.5 MA level,100 ns rise-time ＂Qiangguang-Ⅰ ＂facility are presented.The dominated instability wavelength for imploding 8 mm wire arrays in early ablation regime is （0.2±0.03） mm,and it grows up to longer wavelength in later implosion and stagnation regime.An m=1 kink,when observed,is always on all frames obtained after peak power.Thus there may be some relation between the occurrence of m=1 and the termination of the rapid rise of the power pulse.

关 键 词：钨丝阵 Z箍缩 内爆不稳定性 

分 类 号：O536[理学—等离子体物理] TL65[理学—物理]