Bohm criterion in dusty plasmas with two species of positive ions and non-thermal electrons

被引：16

作者：

Fouial, N. ^{[1
]}

Tahraoui, A. ^{[1
]}

Annou, R. ^{[2
]}

机构：

[1] USTHB, Quantum Elect Lab, Fac Phys, BP 32 El Alia Bab Ezzouar, Algiers 16111, Algeria

[2] USTHB, Theoret Phys Lab, Fac Phys, BP 32 El Alia Bab Ezzouar, Algiers 16111, Algeria

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 11期

关键词：

SHEATH; PARTICLES; DYNAMICS; MOTION;

D O I：

10.1063/1.4967763

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：

Bohm criterion is revisited in the framework of a one-dimensional stationary and unmagnetized low-pressure argon and helium plasma mixture containing non-thermal electrons and dust grains model. Dust grains, electron non-thermality, and ions density ratio effects on Bohm velocities along with dust grain charge number vertical bar Phi(d0)vertical bar, are investigated. It is revealed that Bohm velocities are highly correlated, with their profiles exhibiting a moving peak. Mixing the two gases allowed the appearance of subsonic (argon) as well as supersonic (helium) Bohm velocities. The present model may be generalized to many ion species plasmas. Published by AIP Publishing.

引用

页数：9

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