Kinetic Theory of Expansion of Two-Component Plasma in a Plane Vacuum Diode

A. O. Kokovin; Коковин А. О.; V. Yu. Kozhevnikov; Кожевников В. Ю.; A. V. Kozyrev; Козырев А. В.; V. S. Igumnov; Игумнов В. С.; N. S. Semenyuk; Семенюк Н. С.

doi:10.31857/S1024708423600446

Kinetic Theory of Expansion of Two-Component Plasma in a Plane Vacuum Diode

Authors: Kokovin A.O.¹, Kozhevnikov V.Y.¹, Kozyrev A.V.¹, Igumnov V.S.¹, Semenyuk N.S.¹
Affiliations:
1. Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences
Issue: No 6 (2023)
Pages: 183-191
Section: Articles
URL: https://journals.rcsi.science/1024-7084/article/view/231751
DOI: https://doi.org/10.31857/S1024708423600446
EDN: https://elibrary.ru/VAMYHA
ID: 231751

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Abstract
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Abstract

The results of study of the initial stage of expansion of a collisionless plasma with the electric current into a plane vacuum gap on the basis of kinetic equations for electrons and ions and the Poisson equation for the electric field are given. Self-consistent dynamics of a two-component plasma and electric field are theoretically modeled and the fundamental mechanism for establishing superthermal velocities of charged particles is described in detail. The parameters of anode-directed flows of positive ions in the cathode plume plasma are calculated. The expansion velocities of the cathode plume plasma observed in vacuum arcs at the level of (1−5) × 106 cm/s can be explained within the framework of the proposed collisionless mechanism.

Keywords

computational physical kinetics, vacuum breakdown, anomalous ion acceleration

References

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