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首页> 外文期刊>Physics of plasmas >Ion-cyclotron instability in current-carrying Lorentzian (kappa) and Maxwellian plasmas with anisotropic temperatures: A comparative study
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Ion-cyclotron instability in current-carrying Lorentzian (kappa) and Maxwellian plasmas with anisotropic temperatures: A comparative study

机译：各向异性温度下载流洛伦兹（κ）和麦克斯韦等离子体中离子回旋加速器的不稳定性

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摘要

Current-driven electrostatic ion-cyclotron instability has so far been studied for Maxwellian plasma with isotropic and anisotropic temperatures. Since satellite-measured particle velocity distributions in space are often better modeled by the generalized Lorentzian (kappa) distributions and since temperature anisotropy is quite common in space plasmas, theoretical analysis of the current-driven, electrostatic ion-cyclotron instability is carried out in this paper for electron-proton plasma with anisotropic temperatures, where the particle parallel velocity distributions are modeled by kappa distributions and the perpendicular velocity distributions are modeled by Maxwellian distributions. Stability properties of the excited ion cyclotron modes and, in particular, their dependence on electron to ion temperature ratio and ion temperature anisotropy are presented in more detail. For comparison, the corresponding results for bi-Maxwellian plasma are also presented. Although the stability properties of the ion cyclotron modes in the two types of plasmas are qualitatively similar, significant quantitative differences can arise depending on the values of e and i. The comparative study is based on the numerical solutions of the respective linear dispersion relations. Quasilinear estimates of the resonant ion heating rates due to ion-cyclotron turbulence in the two types of plasma are also presented for comparison.
机译：迄今为止，已经研究了具有各向同性和各向异性温度的麦克斯韦等离子体的电流驱动静电离子回旋加速器的不稳定性。由于通常通过广义洛伦兹（kappa）分布可以更好地模拟卫星测量的空间中的速度分布，并且由于空间等离子体中温度各向异性非常普遍，因此在此对电流驱动的静电离子回旋加速器不稳定性进行了理论分析在具有各向异性温度的电子-质子等离子体的论文中，用kappa分布对粒子平行速度分布进行建模，并通过Maxwellian分布对垂直速度分布进行建模。更加详细地介绍了激发离子回旋加速器模式的稳定性，尤其是它们对电子与离子温度比和离子温度各向异性的依赖性。为了进行比较，还给出了双麦克斯韦血浆的相应结果。尽管两种类型等离子体中离子回旋加速器模式的稳定性在质上相似，但根据e和i的值可能会出现明显的定量差异。比较研究是基于各个线性色散关系的数值解。还提供了两种离子中由于离子回旋加速器湍流引起的共振离子加热速率的拟线性估计，以进行比较。

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