包含多种尘埃成分的等离子体中的尘埃声波  

Dust Acoustic Waves in Dusty Plasma with Many Different Dust Grain Species

作　　者：万桂新[1,2] 郭鹏[1] 

机构地区：[1]兰州交通大学数理与软件工程学院,甘肃兰州730070 [2]西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《兰州交通大学学报》2012年第4期145-148,共4页Journal of Lanzhou Jiaotong University

基　　金：甘肃省自然科学基金(0916RJZA047)

摘　　要：运用约化摄动方法,研究了由多种不同尺寸分布的尘埃颗粒组成的尘埃等离子体中的尘埃声波,得到了描述非线性尘埃声波的Korteweg-de Vries(KdV)方程.结果表明:尘埃声波的波动特性与尘埃颗粒的大小分布、电荷量与半径的非线性关系以及环境常数有关,而且,在该系统中,只有稀疏型孤波存在.By using the reductive perturbation technique, dust acoustic waves in dusty plasma including many different dust grain species have been studied. We obtained a KdV equation for the nonlinear dust acoustic waves in this system. It can be seen that the characteristic of dust acoustic waves is dependent on the dust size distribution, the nonlinear relation between the charge and size of the dust grain and the environmental constant. Moreover,it is found that there is only rare factive solitary waves existing.

关 键 词：约化摄动法 尘埃声波 KDV方程 

分 类 号：O534[理学—等离子体物理]