Explosive-Emission Plasma Dynamics in Ion Diode in Double-Pulse Mode
Explosive-Emission Plasma Dynamics in Ion Diode in Double-Pulse Mode
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DOI：
10.1088/1009-0630/13/6/12
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发表时间：
2011-09
影响因子：
1.7
通讯作者：
A. Pushkarev;Y. Isakova
中科院分区：
文献类型：
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作者：
A. Pushkarev;Y. Isakova
本文介绍了自磁绝缘离子二极管中爆炸等离子体动力学的实验研究结果。研究是在双脉冲形成模式的TEMP-4M加速器上完成的。根据二极管的电流-电压特性（时间分辨率为0.5 ns）和目标上的热印迹（空间分辨率为0.8 mm）分析了阳极-阴极间隙中的等离子体行为。结果表明，当电位电极处等离子体形成完成后，直到第二次脉冲（正）脉冲，爆炸发射等离子体以1.3±0.2 cm/μs的速度在阳极-阴极间隙上扩展。在电位电极的电压极性反转后（第二次脉冲），阳极-阴极间隙中的等离子体侵蚀（类似于等离子体打开开关的效果）发生。在离子束产生过程中，阳极阴极间隙的大小由电位电极上的等离子体层厚度和沿接地电极漂移的电子层厚度决定。
The results of an experimental investigation of explosive-emission plasma dynamics in an ion diode with self-magnetic insulation are presented. The investigations were accomplished at the TEMP-4M accelerator set in a mode of double pulse formation. Plasma behaviour in the anode-cathode gap was analyzed according to both the current-voltage characteristics of the diode (time resolution of 0.5 ns) and thermal imprints on a target (spatial resolution of 0.8 mm). It was shown that when plasma formation at the potential electrode was complete, and up until the second (positive) pulse, the explosive-emission plasma expanded across the anode-cathode gap with a speed of 1.3±0.2 cm/μs. After the voltage polarity at the potential electrode was reversed (second pulse), the plasma erosion in the anode-cathode gap (similar to the effect of a plasma opening switch) occurred. During the generation of an ion beam the size of the anode-cathode gap spacing was determined by the thickness of the plasma layer on the potential electrode and the layer thickness of the electrons drifting along the grounded electrode.