The effect of negative ions on the dust acoustic wave in dusty electronegative plasma with positively charged dust grains

被引：6

作者：

Wang, Yunliang ^{[1
]}

Jiang, Xiangqian ^{[2
]}

Guo, Chunxia ^{[1
]}

Zhou, Zhongxiang ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

[2] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

来源：

PHYSICS LETTERS A | 2011年 / 375卷 / 04期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Dusty plasma; Negative ions; Nonadiabatic dust charge variation; SOLITARY WAVES; SYMBOLIC COMPUTATION;

D O I：

10.1016/j.physleta.2010.12.045

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effect of negative ions on the modulational instability properties of nonlinear dust acoustic (DA) waves in the electronegative dusty plasmas was investigated by considering Boltzmann-distributed electrons, negative ions, positive ions as well as positively charged dust grain under the ultraviolet irradiation. It is shown that the modulational instability properties of the DA waves were strongly affected by the temperature and proportion of negative ions. The modulational instability can occur only if the proportion of negative ions was smaller than critical value. The instability growth rate has a maximum value when the proportion of negative ions was a critical one in the unstable region. The effect of photoelectron generated by ultraviolet irradiation on the modulational instability of dust acoustic waves was also discussed by numerical method. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：832 / 838

页数：7

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