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arXiv physics/0410094physics.plasm-ph
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离子和尘埃离子声波的拉格朗日公式

Lagrangean formulation of ion- and dust-ion-acoustic waves

Ioannis Kourakis, Padma Kant Shukla

摘要:

本文采用一般的无碰撞流体模型研究了非磁化尘埃等离子体中离子声模的传播。欧拉-拉格朗日变量变换导致一个新的演化方程系统,它可以被组合成一个单一的(相当复杂的)方程的平均离子密度。线性和弱非线性振荡制度进行了研究,并研究其调制稳定性。这项研究扩展了已知的电子或离子声静电等离子体模式的拉格朗日描述以前的结果。与尘埃离子声波在尘埃等离子体中传播的描述的相关性也进行了讨论。

英文摘要:

Ion-acoustic modes propagating in unmagnetized dusty plasmas are studied by applying a generic collisionless fluid model. An Eulerian-to-Lagrangean variable transformation leads to a new system of evolution equations, which may be combined into a single (rather complex) equation for the mean ion density. The linear and weakly nonlinear oscillations regimes are studied and their modulational stability is investigated. This study extends known previous results on the Lagrangian description of electron- or ion-acoustic electrostatic plasma modes. The relevance with the description of dust-ion acoustic waves propagating in a dusty plasma is also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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