单层钨丝阵Z箍缩内爆不稳定性特征实验研究

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。

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

Experimental results of instability developments of 8 mm tungsten wire array Z-pinches on the 1.5 MA level, 100 ns rise-time Qiangguang-Ⅰfacility are presented. The dominated instability wavelength for imploding 8 mm wire arrays in early ablation regime is (0.20.03) 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.