The pair-ion plasma has attained special attention due to equal masses and equal but opposite charges. The electrostatic fluctuations with sheared effect are investigated in ideal low-density and low-temperature pure pair-ion (PI) and pair-ion electron (PIE) plasmas in different cases. These instabilities are also studied with homogeneous and inhomogeneous density effects. The growing D'Angelo mode can become the electrostatic instability with shear flow in uniform PIE plasma. It is observed that the shear flow also gives rise to an electrostatic instability in temperature anisotropic pure pair-ion plasma. It is also seen that in pair-ion plasma, the presence of small concentration of electrons results in significant changings in real frequency and growth rate of ion acoustic waves (IAWs). The effect of current driven field aligned flow of electrons on IAWs is also discussed in this article. Kinetic and fluid models are used to study the growth rate of IAWs when both the ionic species have similar shear flow and when both the ionic species have different shear flow.

中文翻译：

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纯对离子和对离子-电子等离子体中离子剪切流不稳定性和平行电子流的研究

对离子等离子体由于质量相等，电荷相等但相反而受到特别关注。研究了理想低密度低温纯对离子（PI）和对离子电子（PIE）等离子体在不同情况下具有剪切效应的静电涨落。这些不稳定性也通过均匀和不均匀的密度效应进行研究。不断增长的 D'Angelo 模式可以成为均匀 PIE 等离子体中剪切流的静电不稳定性。观察到剪切流还引起温度各向异性纯对离子等离子体中的静电不稳定性。还可以看出，在对离子等离子体中，小浓度电子的存在导致离子声波（IAW）的实际频率和生长速率发生显着变化。本文还讨论了电流驱动的场对齐电子流对 IAW 的影响。当两种离子物质具有相似的剪切流和两种离子物质具有不同的剪切流时，动力学和流体模型用于研究 IAW 的生长速率。