A note on the Bohm criterion for electronegative gases

被引：20

作者：

Allen, JE ^{[1
]}

机构：

[1] Univ Coll Oxford, Oxford OX1 4BH, England

来源：

PLASMA SOURCES SCIENCE & TECHNOLOGY | 2004年 / 13卷 / 01期

关键词：

D O I：

10.1088/0963-0252/13/1/006

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：

The Bohm criterion for electronegative gases is known to yield a multi-valued solution for certain plasma parameters. The prescription for the determination of the correct solution, in the original paper by Braithwaite and Allen (1988 J. Phys. D: Appl. Phys. 21 1733), was to choose the smaller value of the two possible potential drops in the quasi-neutral plasma. Several authors have recently questioned this procedure, but this paper affirms the correctness of the original method. It is a fact, however, that this application of the Bohm criterion becomes less useful than is normally the case, since it relates to only one part of the discharge plasma; it will not itself suffice to calculate the flux of positive ions leaving the entire system.

引用

页码：48 / 49

页数：2

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