Charging and Heat Collection by a Positively Charged Dust Grain in a Plasma

被引：51

作者：

Delzanno, Gian Luca ^{[1
]}

Tang, Xian-Zhu ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 03期

关键词：

DYNAMICS; PARTICLES; EMISSION;

D O I：

10.1103/PhysRevLett.113.035002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dust particulates immersed in a quasineutral plasma can emit electrons in several important applications. Once electron emission becomes strong enough, the dust enters the positively charged regime where the conventional orbital-motion-limited (OML) theory can break down due to potential-well effects on trapped electrons. A minimal modification of the trapped-passing boundary approximation in the so-called OML+ approach is shown to accurately predict the dust charge and heat collection flux for a wide range of dust size and temperature.

引用

页数：5

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