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arXiv 1202.0636physics.plasm-phastro-ph.SRcond-mat.stat-mechphysics.geo-phphysics.space-ph
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非广延幂律分布非平衡尘埃等离子体中尘埃的充电过程

Dust charging processes in the nonequilibrium dusty plasma with nonextensive power-law distribution

Jingyu Gong, Jiulin Du

摘要:

基于非广延统计中一种新的q分布函数理论,研究了具有幂律分布的非平衡尘埃等离子体中电子和离子聚集过程中尘埃的充电过程。电子和离子服从幂律分布,q参数不同。导出了计及非广延效应的尘埃带电电流的一般公式。进一步研究了只有粒子速度服从幂律分布的均匀尘埃等离子体和粒子速度和密度均服从幂律分布的尘埃云等离子体中的尘埃荷电过程。通过数值分析,我们发现电子和离子的非广延幂律分布对非平衡尘埃等离子体中尘埃的充电过程有重要影响。

英文摘要:

The dust charging processes in the collections of electrons and ions in the nonequilibrium dusty plasma with power-law distributions are investigated on the basic of a new q-distribution function theory in nonextensive statistics. Electrons and ions obey the power-law distributions and are with q-parameters different from each other. We derive the generalized formulae for the dust charging currents in which the nonextensive effects play roles. Further we investigate the dust charging processes taking place in the homogeneous dusty plasma where only the particle velocities are power-law distributions and in the dust cloud plasma where the particle velocities and densities are both power-law distributions. By numerical analyses, we show that the nonextensive power-law distributions of electrons and ions have significant effects on the dust charging processes in the nonequilibrium dusty plasma.

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