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双温非热尘埃等离子体中的尘埃声波

, PP. 911-914

Keywords: 尘埃声孤波,CoupledKP方程,双温非热离子

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Abstract:

考虑了弱高阶横向扰动的因素,对无磁化、无碰撞的由带负电的尘埃流体、满足非热分布的冷离子和热离子以及自由电子组成的尘埃等离子体为研究对象,使用约化摄动法得到了描述小振幅非线性尘埃声波的CoupledKP方程和孤波解.借助数学软件给出了数值模拟图,详细讨论了尘埃等离子体参数如快离子数、冷离子数密度以及冷离子与电子的温度对孤波结构的影响.从研究结果可以看出,这些参数均会影响和改变孤立波的振幅和宽度,而且会改变系统中出现的孤波类型.该研究对理解等离子体中的波动现象有重要意义.

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