Influence of insulating coating on aluminum wire explosions
Influence of insulating coating on aluminum wire explosions
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DOI：
10.1063/1.4899042
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发表时间：
2014-10
影响因子：
2.2
通讯作者：
Yang Li;L. Sheng;Jian Wu;Xingwen Li;Jizhen Zhao;Mei Zhang;Yuan Yuan-Yuan;B. Peng
中科院分区：
文献类型：
--
作者：
Yang Li;L. Sheng;Jian Wu;Xingwen Li;Jizhen Zhao;Mei Zhang;Yuan Yuan-Yuan;B. Peng
单丝爆炸被广泛用于了解Z箍缩实验的早期阶段。本文介绍了西安交通大学在峰值电流∼为1 kA、上升时间为∼10 ns的脉冲电源上进行的一系列实验。通过对聚酰亚胺涂层铝线和未涂层铝线在三种不同电压下的测试，分析了绝缘涂层对铝线性能的影响。实验结果表明，绝缘涂层可延缓铝线的电压崩溃，提高最大负荷电阻，从而使铝线中的能量沉积增加10%~30%。大量的能量沉积导致涂层线材的膨胀速度加快了约20%。用条纹相机和纹影图观察到了等离子体通道分流线芯电流的实验证据。文中还简要讨论了涂层不均匀对线材膨胀形态的影响。
Single wire explosions are widely used in understanding the early stages of z-pinch experiments. This paper presents a serial of experiments conducted on the pulse power generator with ∼1 kA peak current and ∼10 ns rising time in Xi'an Jiao Tong University. Polyimide coated aluminum wires and uncoated ones were tested under three different voltages to analyze the effect of insulating coating. Experimental results showed that insulating coating can increase the energy deposition 10%∼30% in aluminum wires by delaying the voltage collapse and raising the maximum load resistance. The substantial energy deposition resulted in about 20% faster expansion rates for coated wires. Experimental evidence that plasma channel shunts the current from the wire core was observed by streak camera and schlieren graphs. This paper also briefly discussed the influence of nonuniform coating on the morphology of wire expansion.