Comparison of linear modes in kinetic plasma models
Comparison of linear modes in kinetic plasma models
复制标题
DOI：
10.1017/s0022377817000277
复制
发表时间：
2016-11
影响因子：
2.5
通讯作者：
E. Camporeale;D. Burgess
中科院分区：
文献类型：
--
作者：
E. Camporeale;D. Burgess
我们比较，在一个广泛和系统的方式，线性理论的混合动力（离子动力学和电子流体），gyrokinetic和完全动力学等离子体模型得到的结果。我们提出了一个测试案例的参数是相关的太阳风湍流在小尺度上，这是一个主题，现在认识到需要一个动力学处理，在一定程度上。我们评论的低频单模（Alfv\'{e}n/离子回旋，离子声，和快速模式）的比较广泛的传播角度，和整体的光谱特性的线性算子，准垂直传播。本文提出的方法和结果将是有价值的，当选择哪种模型应使用的制度，每个模型的假设是不平凡的满足。
We compare, in an extensive and systematic way, linear theory results obtained with the hybrid (ion-kinetic and electron-fluid), the gyrokinetic and the fully-kinetic plasma models. We present a test case with parameters that are relevant for solar wind turbulence at small scales, which is a topic now recognized to need a kinetic treatment, to a certain extent. We comment on the comparison of low-frequency single modes (Alfv\'{e}n/ion-cyclotron, ion-acoustic, and fast modes) for a wide range of propagation angles, and on the overall spectral properties of the linear operators, for quasi-perpendicular propagation. The methodology and the results presented in this paper will be valuable when choosing which model should be used in regimes where the assumptions of each model are not trivially satisfied.