强激光与粒子束, 2013, 25 (11): 3069, 网络出版: 2013-11-14
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
摘要
基于激光阴影像,研究了直径为8 mm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0.2 mm。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。
Abstract
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.
蒋树庆, 陈法新, 夏广新, 甯家敏, 薛飞彪, 李林波, 叶繁, 杨建伦, 潘英俊. 单层钨丝阵Z箍缩内爆不稳定性特征实验研究[J]. 强激光与粒子束, 2013, 25(11): 3069. Jiang Shuqing, Chen Faxin, Xia Guangxin, Ning Jiamin, Xue Feibiao, Li Linbo, Ye Fan, Yang Jianlun, Pan Yingjun. Experimental study of implosion instability characteristics in imploding single tungsten wire array Z-pinches[J]. High Power Laser and Particle Beams, 2013, 25(11): 3069.