Abstract

The passage of an ion-acoustic solitary wave through the boundary between an electron-ion plasma and a negative ion plasma is considered. After the ion-acoustic solitary wave enters the region of another plasma, a disturbance arises, from which an ion-acoustic solitary wave and a chain of oscillations form over time. The amplitude of the ion-acoustic solitary wave after passage through the boundary changes in such a way that its value in the electron-ion plasma is greater than its value in the negative ion plasmas. An exception is the case of a compressive ion-acoustic solitary wave propagating through the negative ion plasma and having an amplitude exceeding the critical amplitude in the electron-ion plasma. Such an ion-acoustic solitary wave, when entering an electron-ion plasma, releases an excess of energy to accelerate positive ions and thereby reduces its amplitude below the critical value. The dependence of the amplitude of an ion-acoustic solitary wave established after the boundary crossing on its initial amplitude is determined. The passage of an ion-acoustic solitary wave through a layer of negative ion plasma surrounded by electron-ion plasmas is considered. It is shown that the passage of a rarefactive ion-acoustic solitary wave from the negative ion plasma into the electron-ion plasma causes disturbance, in which accelerated and trapped negative ions can be observed.

Graphic abstract

中文翻译：

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离子声孤立波穿过电子离子等离子体和负离子等离子体之间的边界

摘要

考虑了离子声孤立波通过电子离子等离子体和负离子等离子体之间的边界的通过。在离子声孤立波进入另一个等离子体的区域后，出现了一个干扰，随着时间的流逝，离子声孤立波和一连串的振荡形成了。穿过边界的离子声孤立波的振幅以这样的方式变化，即其在电子离子等离子体中的值大于在负离子等离子体中的值。例外情况是压缩的离子声孤立波传播通过负离子等离子体，并且其振幅超过电子离子等离子体中的临界振幅。这种离子声孤立波在进入电子离子等离子体时，释放过量的能量来加速正离子，从而将其振幅降低到临界值以下。确定在边界交叉之后建立的离子声孤立波的幅度与其初始幅度的相关性。考虑了离子声孤立波通过被电子离子等离子体包围的负离子等离子体层的通过。结果表明，稀有离子声孤立波从负离子等离子体进入电子离子等离子体会引起干扰，其中可以观察到加速和捕获的负离子。考虑了离子声孤立波通过被电子离子等离子体包围的负离子等离子体层的通过。结果表明，稀有离子声孤立波从负离子等离子体进入电子离子等离子体会引起干扰，其中可以观察到加速和捕获的负离子。考虑了离子声孤立波通过被电子离子等离子体包围的负离子等离子体层的通过。结果表明，稀有离子声孤立波从负离子等离子体进入电子离子等离子体会引起干扰，其中可以观察到加速和捕获的负离子。

图形摘要