弱横向扰动下的热尘埃等离子体中的尘埃声孤波  

Dust Acoustic Solitary Waves in Hot Dusty Plasma Under the Weakly Transverse Perturbations

作　　者：王红艳[1] 张开彪[1] 

机构地区：[1]四川理工学院物理系,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2008年第3期12-15,共4页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川理工学院引进人才项目资助(NO.07ZR46)

摘　　要：文章研究了弱横向扰动下的含有非热离子、尘埃颗粒电荷变化的热尘埃等离子体,利用约化摄动法得到了描述尘埃声孤波的(3+1)维Kadomtsev-Petviashvili方程。结果表明,与在一维空间传播的尘埃声孤波相比,弱横向扰动会减小三堆尘埃声孤波的振幅,而使宽度增大,而且,稀疏形孤立波和压缩形孤立波均可出现。结果还表明,非热离子分布会显著改变尘埃颗粒的电荷数.By using the reductive perturbation method, we derived a （3＋1） dimensional Kadomtsev-Petviashvili equation which describes the dust acoustic solitary waves in a hot dusty plasma with non-thermal distributed ions and variable dust charge under the weakly transverse perturbations. It is found that compare with the dust acoustic solitary waves propagate in the one dimensional space, the amplitude of three dimensional dust acoustic solions may decrease, whereas their width increases at the presence of the weakly transverse perturbation. Furthermore, both rarefactive and compressive solitons can be obtained. It is also shown that the non-thermal distributed ions can significantly change the dust charge

关 键 词：(3+1)维KP方程 尘埃声孤波 非热离子 尘埃颗粒电荷变化 

分 类 号：O534[理学—等离子体物理]