Charging and coupling of a vertically aligned particle pair in the plasma sheath
Charging and coupling of a vertically aligned particle pair in the plasma sheath
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DOI：
10.1063/1.3689854
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发表时间：
2012-03-01
影响因子：
2.2
通讯作者：
Piel, Alexander
中科院分区：
文献类型：
--
作者：
Carstensen, Jan;Greiner, Franko;Piel, Alexander
研究了双粒子体系中粒子链形成的现象。正离子的尾流导致带负电荷的粒子与离子流平行排列。计算了该粉尘系统对微小外部扰动的动态响应。结果表明，与孤立粒子相比，下游粒子的本征频率降低了。这种效应可以被认为是上游颗粒尾迹中集中的离子流对颗粒的放电。此外，发现粒子相互作用与离子流平行，具有很强的不对称性。这种不对称性可能不能完全归因于离子尾流介导的相互作用力。(C) 2012年美国物理研究所。[http://dx.doi.org/10.1063/1.3689854]
The phenomenon of particle chain formation is studied in a two-particle system. A wake of positive ions leads to an alignment of the negatively charged particles parallel to the ion flow. The dynamic response of this dust system to a small external perturbation is evaluated. It is shown that the eigenfrequency of the downstream particle is reduced compared to an isolated particle. This effect can be identified as a decharging of the particle by the focused ion flow in the wake of the upstream particle. Furthermore, a strong asymmetry of the particle interaction parallel to the ion flow is found. This asymmetry may not be attributed entirely to the interaction forces mediated by the ion wake. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3689854]