Residual dust charges in discharge afterglow

被引：83

作者：

Couedel, L.

Mikikian, M.

Boufendi, L.

Samarian, A. A.

机构：

[1] Univ Orleans, CNRS, GREMI, F-45067 Orleans 2, France

[2] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW E | 2006年 / 74卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.74.026403

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：

An on-ground measurement of dust-particle residual charges in the afterglow of a dusty plasma was performed in a rf discharge. An upward thermophoretic force was used to balance the gravitational force. It was found that positively charged, negatively charged, and neutral dust particles coexisted for more than 1 min after the discharge was switched off. The mean residual charge for 200-nm-radius particles was measured. The dust particle mean charge is about -5e at a pressure of 1.2 mbar and about -3e at a pressure of 0.4 mbar.

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页数：9

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