The effects of insulating coatings and current prepulse on tungsten planar wire array Z-pinches
The effects of insulating coatings and current prepulse on tungsten planar wire array Z-pinches
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绝缘涂层和电流预脉冲对钨平面线阵列 Z 箍缩的影响
DOI：
10.1063/1.4938276
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发表时间：
2015
影响因子：
2.2
通讯作者：
Liangping Wang
中科院分区：
文献类型：
--
作者：
Mo Li;Liang Sheng;Liangping Wang
本文介绍了在100ns直流装置上研究绝缘涂层和电流预脉冲对钨丝平面阵列Z箍缩效应的实验结果。光学分幅图像表明，没有电流预脉冲的金属丝烧蚀过程是不对称的，内爆是拉链式的。X射线峰值功率为1.320 GW。通过在导线表面上使用绝缘涂层，保持了不对称性，并且烧蚀和内爆的过程被延迟了30 ns。X射线爆发范围很窄，减少到200 GW。当在标准和绝缘导线阵列上使用电流预脉冲时，内爆对称性得到改善，X射线爆发得到改善（峰值功率为1.520 GW）。此外，有一个强大的发射前体柱的绝缘负载与电流预脉冲。
This paper presents experimental results on the effects of insulating coatings and current prepulse on tungsten planar wire array Z-pinches on ∼100 ns main current facility. Optical framing images indicated that without a current prepulse the wire ablation process was asymmetrical and the implosion was zippered. The x-ray peak power was ∼320 GW. By using insulating coatings on the wire surface the asymmetry remained, and the processes of ablation and implosion were delayed by ∼30 ns. The x-ray burst was narrow and decreased to ∼200 GW. When current prepulses were used on both standard and insulated wire arrays, implosion symmetry was improved and the x-ray burst was improved (to ∼520 GW peak power). In addition, there was a strong emitting precursor column for insulated loads with the current prepulse.