Abstract

The results of studies of the dynamics of near-electrode processes in the initial phase of a spark discharge in atmospheric-pressure air in the point-plane geometry are presented. After breakdown, regions of about 50 μm or more in size with an increased electron concentration of (3–8) × 10¹⁹ cm^–3 near the surface of the flat cathode have been observed. With allowance for the experimental data on erosion effect of the discharge on the surface of a flat electrode and the associated gas-dynamic effects, a physical model of near-electrode processes has been proposed, based on which the gas-dynamic parameters are estimated.

中文翻译：

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空气中微结构火花放电初始阶段的等离子体和气体动力学近电极过程

摘要

给出了在点平面几何结构中大气压空气中火花放电初始阶段中近电极过程动力学的研究结果。击穿后，在扁平阴极表面附近观察到约50μm或更大的区域，电子浓度增加了（3-8）×10 ¹⁹ cm ^-3。考虑到有关扁平电极表面放电腐蚀效应和相关气体动力学效应的实验数据，提出了一种近电极过程的物理模型，据此估算了气体动力学参数。