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arXiv 2102.02165physics.plasm-ph
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非热非延拓电子对离子等离子体中尘埃-离子-声波的调制不稳定性

Modulational instability of dust-ion-acoustic waves in pair-ion plasma having non-thermal non-extensive electrons

M. K. Islam, A. A. Noman, J. Akter, N. A. Chowdhury, A. Mannan, T. S. Roy, M. Salahuddin, A. A. Mamun

摘要:

研究了在含有惯性对离子、无惯性非热非广延电子和不动带负电荷大质量尘埃颗粒的四分量对离子等离子体中尘埃离子声波的调制不稳定性判据。利用约化微扰方法导出了一个非线性薛定谔方程(NLSE). NLSE的非线性系数和色散系数可以预测DIAWs和相关的一阶和二阶DIA流氓波(DIARWs)的调制稳定和不稳定的参数机制。的MI增长率和配置的DIARW的检查,它被发现,MI增长率增加(减少)的负离子的存在(不存在)的情况下,随着带负电荷的尘埃粒子的数密度的增加。同时还观察到DIARW的振幅和宽度随着负(正)离子质量的增加而增大(减小)。简要讨论了这些结果对实验室和空间等离子体的意义。

英文摘要:

The modulational instability (MI) criteria of dust-ion-acoustic (DIA) waves (DIAWs) have been investigated in a four-component pair-ion plasma having inertial pair-ions, inertialess non-thermal non-extensive electrons, and immobile negatively charged massive dust grains. A nonlinear Schrödinger equation (NLSE) is derived by using reductive perturbation method. The nonlinear and dispersive coefficients of the NLSE can predict the modulationally stable and unstable parametric regimes of DIAWs and associated first and second order DIA rogue waves (DIARWs). The MI growth rate and the configuration of the DIARWs are examined, and it is found that the MI growth rate increases (decreases) with increasing the number density of the negatively charged dust grains in the presence (absence) of the negative ions. It is also observed that the amplitude and width of the DIARWs increase (decrease) with the negative (positive) ion mass. The implications of the results to laboratory and space plasmas are briefly discussed.

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