标题： 离子流不稳定性对等离子体边界附近输运的影响 显示英文标题

标题： Influence of Ion Streaming Instabilities on Transport Near Plasma Boundaries

摘要： 等离子体边界层容易受到由预鞘中离子流驱动的静电不稳定性的影响，当存在这些不稳定性时，它们可能会影响输运过程。 在只有一种正离子种类的等离子体中，当压力较低且电子与离子温度比值较大时（$T_e/T_i \gg 1$），预计会发生离子声不稳定性。 在有两种正离子种类的等离子体中，也可以激发离子-离子双流不稳定性。 使用Penrose准则和近似的线性色散关系来表征稳定性相空间。 还简要回顾了这些不稳定性如何影响预鞘中的离子和电子输运的预测，包括由于不稳定性增强的碰撞导致的快速热化以及不稳定性增强的离子-离子摩擦力。 还讨论了这些预测的最近实验测试以及进一步验证所需的研究需求。 计算得到的稳定性边界为确定可以预期这些效应的实验条件提供了指导。 显示英文摘要

摘要： Plasma boundary layers are susceptible to electrostatic instabilities driven by ion flows in presheaths and, when present, these instabilities can influence transport. In plasmas with a single species of positive ion, ion-acoustic instabilities are expected under conditions of low pressure and large electron-to-ion temperature ratio ($T_e/T_i \gg 1$). In plasmas with two species of positive ions, ion-ion two-stream instabilities can also be excited. The stability phase-space is characterized using the Penrose criterion and approximate linear dispersion relations. Predictions for how these instabilities affect ion and electron transport in presheaths, including rapid thermalization due to instability-enhanced collisions and an instability-enhanced ion-ion friction force, are also briefly reviewed. Recent experimental tests of these predictions are discussed along with research needs required for further validation. The calculated stability boundaries provide a guide to determine the experimental conditions at which these effects can be expected.