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arXiv physics/0505011physics.plasm-ph
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亚音速离子声孤子

Subsonic ion-acoustic solitons

H. Abbasi, H. Hakimi Pajouh, H. A. Shah

摘要:

本文将等离子体波的非线性理论推广到平衡态服从非麦克斯韦分布的等离子体。我们认为,由于大多数空间和一些实验室等离子体不处于麦克斯韦平衡,因此这种扩展是非常重要的。虽然这个问题的线性理论已经知道了几十年,但据我们所知,这是第一次尝试打开大门的非线性世界的等离子体波与非麦克斯韦平衡。作为一个例子,在此框架下研究了考虑纵向场槽中电子俘获的离子声孤子。结果表明,作为非麦克斯韦平衡的最重要结果,离子声孤子存在亚音速运动的可能性。孤子的速度和宽度都是谱指数($κ$)的单调递增函数,并以$κ\to \infty$的形式逼近其麦克斯韦值。

英文摘要:

In this paper, the nonlinear theory of plasma waves is extended to the plasmas that their equilibrium state are specified by the non-Maxwellian (here kappa) distribution. We believe that the extension is very important since most of the space and some of laboratory plasmas are not in the Maxwellian equilibrium. Although the linear theory of this issue has been known for the decades but, to our knowledge, this is the first attempt in opening the gate to the nonlinear world of plasma waves with the non-Maxwellian equilibrium. As an example the ion-acoustic solitons are studied in this framework taking into account the electron trapping in the trough of longitudinal field. It is shown, as the most important result regarding to the non-Maxwillian equilibrium, that there is the possibility for the ion-acoustic solitons to move subsonically. The solitons velocity and their width are monotonically increasing functions of spectral index ($κ$) and approach to the their Maxwellian values as $κ\to \infty$.

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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