Interaction of rapid magnetic fields with plasmas and implications to pulsed-power systems

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI:10.1109/MODSYM.2002.1189419

R. Arad, A. Weingarten, K. Tsigutkin, Y. Ralchenko, D. Osin, Y. Maron, A. Fruchtman, N. Chakrabarti, R. Commisso, B. Weber

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引用次数: 1

Abstract

The behavior of rapidly rising magnetic fields decisively affects the operation of plasma opening switches, high-power transmission lines, and particle-beam diodes. Here, we describe recently observed novel phenomena in the interaction of magnetic fields with plasmas in such systems. The understanding of the underlying physics is used to design and optimize plasma opening switches and their coupling to loads. High-resolution spectroscopic methods, with the aid of plasma doping techniques, were used to obtain the time-dependent 2-D distributions of the magnetic field, ion velocities, electron density, and electron energy distribution. The results showed simultaneous rapid magnetic field penetration and plasma reflection accompanied by ion-species separation [A. Weingarten et. al., Phys. Rev. Lett. 87, 115004 (2001)]. These phenomena strongly modify the plasma dynamics, thereby influencing the effective switch impedance and the resultant coupling of the power to the load. The current conduction and switch operation are also found to be highly influenced by the electron density distribution and plasma composition. Possible ways to improve the system operation, brought about by these findings, are suggested.

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快速磁场与等离子体的相互作用及其对脉冲电源系统的影响

迅速上升的磁场的行为决定性地影响等离子打开开关，高功率传输线和粒子束二极管的操作。在这里，我们描述了最近观察到的磁场与等离子体在这种系统中的相互作用的新现象。对基础物理的理解用于设计和优化等离子体开闸开关及其与负载的耦合。借助等离子体掺杂技术，采用高分辨率光谱方法获得了磁场、离子速度、电子密度和电子能量随时间变化的二维分布。结果表明，磁场快速穿透和等离子体反射同时发生，并伴有离子分离[A]。Weingarten等人，物理学家。[j].科学通报，2004，(1)。这些现象强烈地改变了等离子体动力学，从而影响了有效开关阻抗和由此产生的功率与负载的耦合。电子密度分布和等离子体组成对电流传导和开关操作也有很大影响。根据这些发现，提出了改进系统运行的可行方法。

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Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.

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