Charging of multiple grains in subsonic and supersonic plasma flows

被引：25

作者：

Block, D. ^{[1
]}

Miloch, W. J. ^{[2
]}

机构：

[1] Univ Kiel, IEAP, D-24098 Kiel, Germany

[2] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2015年 / 57卷 / 01期

关键词：

plasma; dust; wake; charge; DUST PARTICLES; COMPLEX; INSTABILITY; MOLECULES;

D O I：

10.1088/0741-3335/57/1/014019

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 role of wake effects in the charging of dust grains by plasmas with subsonic and supersonic ion flows is studied with numerical simulations. Significant ion focusing which is common for supersonic flows is also observed for subsonic regimes. In both regimes, the charge on a downstream grain aligned with the flow depends linearly on the intergrain distance. For subsonic flows and systems with several grains, the complex ion dynamics can lead to significant modifications of the charge on grains located close to the boundary of a dust lattice and the charge distribution on the grains depends on the detailed grain arrangement. The studies are carried out with DiP3D, a self-consistent particle-in-cell code (Miloch 2010 Plasma Phys. Control. Fusion 52 124004; Miloch and Block 2012 Phys. Plasmas 19 123703).

引用

页数：8

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