含有双温非热离子的热尘埃等离子体中二维尘埃声孤波

以含有双温非热离子的无磁化热尘埃等离子体为研究对象,使用约化摄动方法得到了描述有限小振幅波动的KP方程.研究结果表明,尘埃流体的温度及两种不同温度满足非热分布的离子会严重影响和改变着尘埃声孤波的类型与结构,系统中既可能出现稀疏形孤波也可能出现压缩形孤波,而且,孤波的振幅与宽度亦有明显改变.

The Two-dimensional Dust-acoustic Solitary Waves in a Hot Dusty Plasma with two-Temperature Nonthermal Ions

For an unmagnetized hot dusty plasma with two-temperature nonthermal distributed ions,a KP equation is derived by using the reductive perturbation method which is valid for small but infinite amplitude waves.It is found that the dust fluid temperature and two-temperature nonthermal ions have very important effect on the nature of the dust-acoustic solitary waves,and support the coexistence of compressive and rarefactive solitary waves in this system.Meanwhile,they also play a significant role on the amplitude and width of the solitons.