Abstract

In this work, a model of the cathode spot of a vacuum arc in the framework of the drift-diffusion representation has been considered. The use of the drift-diffusion approximation eliminates the need to calculate the particle energy distribution functions and take into account various energy reactions that are not accompanied by a change in the particle charge. It has been shown that the field strength of the plasma column is significantly reduced. The column is surrounded by a space charge of slow positive ions, providing a high field strength in front of it. At the stage of the formed plasma boiler, the ionization of metal vapor occurs mainly in a thin layer in front of the ion cloud, and ion recombination prevails in the column.

中文翻译：

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低压电弧放电中的电离过程

摘要

在这项工作中，已经考虑了在漂移扩散表示的框架中真空电弧阴极点的模型。漂移-扩散近似的使用消除了计算颗粒能量分布函数的需要，并考虑了不伴随颗粒电荷变化的各种能量反应。已经表明，等离子体柱的场强显着降低。色谱柱被慢速正离子的空间电荷包围，在其前面提供了较高的场强。在形成的等离子锅炉的阶段，金属蒸气的电离主要发生在离子云前面的薄层中，并且离子重组在色谱柱中占主导地位。