The role of dust charging frequency in the linear and nonlinear propagation of dust acoustic waves

被引：4

作者：

Asgari, H. ^{[1
]}

Muniandy, S. V. ^{[1
]}

Wong, C. S. ^{[1
]}

机构：

[1] Univ Malaya, Dept Phys, Plasma Res Lab, Kuala Lumpur 50603, Malaysia

来源：

WAVE MOTION | 2011年 / 48卷 / 03期

关键词：

Dusty plasma; Dust acoustic waves; Charge fluctuation; Dispersion relation; Envelope excitation; PLASMA; FLUCTUATIONS; MODULATION; AMPLITUDE; DYNAMICS; SOLITARY; MODES; GRAIN;

D O I：

10.1016/j.wavemoti.2010.11.002

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The effect of dust charge fluctuation on the existence and propagation of dust acoustic waves in unmagnetized dusty plasma is studied. Dispersion relation for the dust acoustic waves with temporal dust charge fluctuations is calculated based on the reductive perturbation technique. By considering two different limiting cases of the dust charging frequency, it is shown that the dusty plasma system gives rise to linear or nonlinear dust acoustic waves. The well-known collisionless damping of two existing normal modes and one purely damped mode are recovered when the dust charging frequency is comparable to the dust acoustic wave frequency. On the other hand, when the dust charging frequency is considerably higher than the wave frequency, it is then possible to derive a nonlinear Schrodinger type equation with envelope soliton as solution. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：268 / 274

页数：7

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