Dust-Acoustic Solitary Waves in a Magnetized Dusty Plasma With Ions Of Distinct Temperatures

M. Anowar, I. Tasnim, M. Masud
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Abstract

A theoretical investigation has been made of obliquely propagating electrostatic solitary structures in a magnetized dusty plasma, composed of negatively charged dust, nonthermal ions of distinct temperatures, and Boltzmann distributed electrons. The properties of small but finite amplitude dust-acoustic solitary waves (DASWs) in this dusty plasma system are studied by deriving the Zakharov-Kuznetsov (ZK) equation. It has been inferred that the effects of obliqueness, external magnetic field, nonthermal ions of two distinct temperatures, and Boltzmann electrons cause modification of the characteristics (i.e., amplitude and width) of these solitary structures. The implications of our present investigation in understanding the basic features of nonlinear electrostatic perturbations observed in many space plasma systems and laboratory devices are briefly discussed.
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尘埃-具有不同温度离子的磁化尘埃等离子体中的声学孤波
对由带负电荷的尘埃、不同温度的非热离子和玻尔兹曼分布电子组成的磁化尘埃等离子体中斜传播的静电孤立结构进行了理论研究。通过推导Zakharov-Kuznetsov (ZK)方程,研究了尘埃等离子体系统中小而有限振幅的尘声孤立波(DASWs)的特性。据推测,倾角、外磁场、两种不同温度的非热离子和玻尔兹曼电子的影响会导致这些孤立结构的特性(即振幅和宽度)的改变。简要讨论了我们目前的研究对理解在许多空间等离子体系统和实验室装置中观察到的非线性静电扰动的基本特征的意义。
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