标题： 部分电离等离子体中MHD湍流的阻尼：对宇宙射线传播的影响 显示英文标题

标题： Damping of MHD turbulence in partially ionized plasma: implications for cosmic ray propagation

摘要： 我们研究了部分电离介质中不可压缩和可压缩磁流体动力学（MHD）湍流的中性-离子碰撞阻尼。 我们从应用单流体和双流体处理方法的MHD波的线性分析开始。 然后，从线性分析得到的阻尼率用于确定MHD湍流的阻尼尺度。 研究了MHD湍流的阻尼尺度与线性MHD波截止边界的物理联系。 我们的分析结果被证明适用于各种部分电离的星际介质（ISM）相和太阳色球层。 作为重要的天体物理应用，我们引入了部分电离ISM中宇宙射线传播的阻尼效应。 识别了湍流阻尼在穿越时间阻尼和回旋共振中的重要作用。 显示英文摘要

摘要： We study the damping from neutral-ion collisions of both incompressible and compressible magnetohydrodynamic (MHD) turbulence in partially ionized medium. We start from the linear analysis of MHD waves applying both single-fluid and two-fluid treatments. The damping rates derived from the linear analysis are then used in determining the damping scales of MHD turbulence. The physical connection between the damping scale of MHD turbulence and cutoff boundary of linear MHD waves is investigated. Our analytical results are shown to be applicable in a variety of partially ionized interstellar medium (ISM) phases and solar chromosphere. As a significant astrophysical utility, we introduce damping effects to propagation of cosmic rays in partially ionized ISM. The important role of turbulence damping in both transit-time damping and gyroresonance is identified.