双温非热尘埃等离子体中的二维尘埃声孤波  

Two-dimensional Dust-acoustic Solitary Waves in a Dusty Plasmawith Two-temperature Nonthermal Ions

作　　者：张开彪[1] 王红艳[1] 周志坚[1] 向必纯[1] 王永华[1] 

机构地区：[1]四川理工学院物理系,四川自贡643000

出　　处：《信阳师范学院学报（自然科学版）》2010年第2期204-207,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：四川省教育厅重点科研项目(08ZA161);四川理工学院学校科研基金项目(2009xjkyL006);四川理工学院理学院自然科学基金资助项目

摘　　要：使用约化摄动方法得到了高阶横向扰动下的含有双温非热离子的无磁化尘埃等离子体中的KP方程.研究结果表明,高阶横向扰动会使孤波的振幅减小,而使宽度增大,双温非热离子的存在会严重影响着尘埃声孤波的结构,而且,稀疏形孤波与压缩形孤波均可能出现.An unmagnetized dusty plasma with two-temperature nonthermal distributed ions under the higher order transverse perturbations was studied, A Kadomtsev-Petviashvili （KP） equation is derived by using the reductive perturbation method. It is found that in the presence of the higher order transverse oerturbations, the peak amplitude of the solitary waves may decrease, whereas their width increases as compared to the one-dimensional case. Meanwhile, the two-temperature nonthermally distributed ions have significant influence on solitons structures. Fourthermore, compressive and rarefactive solitary waves can coexist in this system.

关 键 词：尘埃声孤波 KP方程 双温非热离子 高阶横向扰动 

分 类 号：O534[理学—等离子体物理]