等离子体断路开关装置上的多丝Z箍缩初步实验

Preliminary experiments of multi-wire Z-pinch on plasma opening switch

开展了基于等离子体断路开关的脉冲功率源驱动多丝Z箍缩负载初步实验，实验中采用了2根或4根钨丝组成的环形阵列，其中钨丝的直径分别为7μm和20μm。利用高速扫描摄影获取钨丝电爆炸和箍缩过程中等离子体自发光的物理图像。实验结果表明：导通电流为105kA的等离子体断路开关将67%～78%的电流转换至金属丝阵负载上，负载电流上升沿为84-110ns。高速扫描相机观察到了钨丝电爆炸形成晕等离子体及其向轴线箍缩和后期向外膨胀的物理过程。

Tungsten wire array Z-pinch experiments performed on a 100 kA, 100 ns rise-time POS-based inductive generator were reported. The array consisted of 2 or 4 tungsten wires of 7 μm or 20 μm in diameter. Plasma luminescence pictures with 0. 05 mm/ns resolution were taken by a fast streak camera. It turns out that 67%-78% of the 105 kA conduction current has been transferred from POS to the wire array loads, and the rise time of load current is 84-110 ns. The corona plasma formation, implosion and expansion after electrically exploding of tungsten wires were observed distinctly.