Ordered dusty structures in the plasma of an RF electrodeless gas discharge
Ordered dusty structures in the plasma of an RF electrodeless gas discharge
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DOI：
10.1134/1.952873
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发表时间：
2000-05-01
影响因子：
1.1
通讯作者：
Fortov, VE
中科院分区：
文献类型：
--
作者：
Zobnin, AV;Nefedov, AP;Fortov, VE
给出了感应射频放电等离子体中尘埃颗粒行为的实验研究和数值模拟结果。实验用霓虹灯，气压25-500帕，用1.87微米的三聚氰胺甲醛颗粒。放电由运行在100 MHz频率的发电机提供的环形电感激励。数值模拟中所用的尘粒有效相互作用势包括颗粒电荷对等离子体漂移电势的空间依赖性、漂移离子流被带负电荷的颗粒聚焦引起的颗粒相互作用各向异性以及等离子体中和颗粒表面复合的等离子体电子和离子对尘埃颗粒的屏蔽特性。蒙特卡罗模拟结果表明，在感应无电极放电等离子体中，实验观察到的尘埃颗粒形成了特殊的细丝结构。(C)2000年Maik“Nauka/Interperia”。
Results are presented from the experimental studies and numerical simulations of the behavior of dust grains in the plasma of an inductive RF discharge. The experiments were carried out with neon at a pressure of 25-500 Pa and with 1.87-mu m melamine formaldehyde grains. The discharge was excited by a ring inductor supplied from a generator operating at a 100-MHz frequency. The effective dust-grain interaction potential used in numerical simulations involved the spatial dependence of the grain charge on the plasma floating potential, grain-interaction anisotropy resulting from the focusing of the drift ion current by the negatively charged grains, and specific features of the shielding of the dust grains by the plasma electrons and ions recombining both in the plasma bulk and on the grain surface. The results of Monte Carlo simulations show that the dust grains form specific filament structures observed experimentally in the plasma of an inductive electrodeless discharge. (C) 2000 MAIK "Nauka/Interperiodica".