摘要
研究了高阶横向扰动下含有双温非热离子的无磁化的热尘埃等离子体,使用约化摄动方法得到了(3+1)维Kadomtsev-Petviashvili(KP)方程.讨论了尘埃流体温度σ与快离子数λ(α)对尘埃声孤波性质的影响.研究结果表明,这些因素均可显著影响和改变孤波结构.系统中不仅会出现稀疏形孤波,也会出现压缩形孤波.另外,孤波的振幅随快离子数λ(α)的增大而减小,但孤波的宽度却随之增大.
An unmagnetized hot dusty plasma with two-temperature nonthermal distributed ions under the higher order transverse perturbations is studied,a（3＋1） dimendional Kadomtsev-Petviashvili（KP） equation is obtained by using the reductive perturbation method.The effects of the dust fluid temperature and the fast ions on the properties of solitary waves are studied.The results suggest that these parameters can significantly influence the structures of the solitons.Further,both compressive and rarefactive solitary waves could coexist in this system.It is also observed that as the fast ions rises,the amplitude of solitary waves decreases,whereas their width increases.
出处
《河北师范大学学报（自然科学版）》
CAS
北大核心
2010年第5期544-548,共5页
Journal of Hebei Normal University：Natural Science
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(2009XJKYL006)
四川理工学院理学院自然科学基金(09LXYC01)
关键词
尘埃声孤波
(3+1)维KP方程
双温非热离子
高阶横向扰动
dust-acoustic solitons
（3＋1） dimensional KP equation
two-temperature nonthermal ions
higher order transverse perturbations
