A simplified fluid model of the metallic plasma and neutral gas interaction in a multicathode spot vacuum arc

被引：13

作者：

Kelly, H ^{[1
]}

Marquez, A ^{[1
]}

Minotti, FO ^{[1
]}

机构：

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, CONICET,Inst Fis Plasma, RA-1428 Buenos Aires, DF, Argentina

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 1998年 / 26卷 / 04期

关键词：

fluid model; ion-gas interaction; vacuum arc;

D O I：

10.1109/27.725165

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A stationary fluid model with spherical symmetry is presented to describe the interaction between metallic plasma ions with neutral gas in the outer region of a multicathode spot vacuum are operated with a neutral background gas. It is found that the neutrals penetrate into the metallic plasma with density values smaller than the initial gas density values, but higher than the metallic ion densities. The neutrals are also strongly heated during the transient expansion stage of the metallic plasma. As a consequence, the ion kinetic energy is gradually delivered to the neutral gas so that the mean free path for ion-neutral elastic collisions is larger than the visible plasma ball radius which surrounds the are.

引用

页码：1322 / 1329

页数：8

共 22 条

[1] INFLUENCE OF RESIDUAL GASES ON CATHODE SPOT BEHAVIOR [J].