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arXiv 2011.13799physics.plasm-ph
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非热等离子体中的一阶和二阶尘埃离子声波

First and second-order dust-ion-acoustic rogue waves in non-thermal plasma

S. Banik, R. K. Shikha, A. A. Noman, N. A. Chowdhury, A. Mannan, T. S. Roy, A. A. Mamun

摘要:

采用约化微扰方法导出了一个非线性薛定谔方程(NLSE),用于研究尘埃-离子-声波(DIAWs)的调制不稳定性.据观察,在考虑下,等离子体系统支持调制稳定和不稳定的域,这是由NLSE的色散和非线性系数的符号,DIAWs的。研究还发现,随着电子和正电子的非热性的增加,非线性度以及一阶和二阶反常波的高度和宽度都增加。指出了我们目前的研究与空间等离子体观测的相关性。

英文摘要:

A nonlinear Schrödinger equation (NLSE) has been derived by employing reductive perturbation method for investigating the modulational instability of dust-ion-acoustic waves (DIAWs) in a four-component plasma having stationary negatively charged dust grains, inertial warm ions, and inertialess non-thermal electrons and positrons. It is observed that under consideration, the plasma system supports both modulationally stable and unstable domains, which are determined by the sign of the dispersive and nonlinear coefficients of NLSE, of the DIAWs. It is also found that the nonlinearity as well as the height and width of the first and second-order rogue waves increases with the non-thermality of electron and positron. The relevancy of our present investigation to the observations in space plasmas is pinpointed.

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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