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arXiv 2103.16014physics.plasm-phastro-ph.SRphysics.space-ph
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BO 2.0:等离子体波和不稳定性分析与增强极化计算

BO 2.0: Plasma Wave and Instability Analysis with Enhanced Polarization Calculations

Hua-sheng Xie, Richard Denton, Jin-song Zhao, Wen Liu

摘要:

除了波矢量$\bm k$和复频率$ω$之间的关系之外,波偏振对于表征等离子体波的性质是有用的。电磁场的偏振态$δ\bm E$和$δ\bm B$在等离子体物理研究中有着广泛的应用。在这里,我们推导出方程的密度和速度扰动,$δn_s$和$δ{\bm v}_s$,分别在电磁动力学等离子体色散关系中的每个物种,通过使用它们的关系到物种电流密度扰动$δ{\bm J}_s$。然后,我们比较结果与另一种常用的等离子体色散代码(WHAMP)和与多流体等离子体色散关系。我们还总结了一些有用的极化量,如磁椭圆率,磁椭圆长轴的取向,各种场能和动能的比值,组分压缩性,平行相比,阿尔文比等,这对等离子体物理研究,特别是空间等离子体研究是有用的。这项工作是BO电磁色散代码[H. S. Xie,Comput. Phys.Comm.244(2019)343-371],以增强其极化计算并包括求解电磁磁化多流体等离子体色散关系的能力。

英文摘要:

Besides the relation between the wave vector $\bm k$ and the complex frequency $ω$, wave polarization is useful for characterizing the properties of a plasma wave. The polarization of the electromagnetic fields, $δ\bm E$ and $δ\bm B$, have been widely used in plasma physics research. Here, we derive equations for the density and velocity perturbations, $δn_s$ and $δ{\bm v}_s$, respectively, of each species in the electromagnetic kinetic plasma dispersion relation by using their relation to the species current density perturbation $δ{\bm J}_s$. Then we compare results with those of another commonly used plasma dispersion code (WHAMP) and with those of a multi-fluid plasma dispersion relation. We also summarize a number of useful polarization quantities, such as magnetic ellipticity, orientation of the major axis of the magnetic ellipse, various ratios of field energies and kinetic energies, species compressibility, parallel phase ratio, Alfvén-ratio, etc., which are useful for plasma physics research, especially for space plasma studies. This work represents an extension of the BO electromagnetic dispersion code [H.S. Xie, Comput. Phys. Comm. 244 (2019) 343-371] to enhance its calculation of polarization and to include the capability of solving the electromagnetic magnetized multi-fluid plasma dispersion relation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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