One-dimensional particle-in-cell simulations of electrostatic Bernstein waves in plasmas with kappa velocity distributions
One-dimensional particle-in-cell simulations of electrostatic Bernstein waves in plasmas with kappa velocity distributions
复制标题
具有 kappa 速度分布的等离子体中静电伯恩斯坦波的一维颗粒细胞模拟
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
R. Mace
中科院分区：
文献类型：
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作者：
R. F. Abdul;R. Mace
利用一维和二维半格子粒子模拟方法研究了电子-离子等离子体中垂直于静磁场传播的静电伯恩斯坦波。使用mi/me = 100的离子-电子质量比，允许电子和离子时间尺度的充分分离，同时仍然考虑离子动力学，而不诉诸于异常长的模拟运行时间。作为所使用的质量比的结果，高频电子伯恩斯坦波和低频离子伯恩斯坦波都在单个模拟运行内被解析。这里提出的模拟使用各向同性的三维卡帕速度分布以及广泛使用的麦克斯韦速度分布，并从使用这些速度分布的结果进行了分析和比较。的行为的伯恩斯坦波被发现是显着依赖于频谱指数，κ，在所有频域的Bernst.
Electrostatic Bernstein waves that propagate exactly perpendicularly to a static magnetic field in an electron-ion plasma are investigated using one-and-two-halves dimensional particle-in-cell simulations. An ion-to-electron mass ratio of mi/me = 100 is used, allowing sufficient separation of the electron and ion time scales while still accounting for the ion dynamics without resorting to exceptionally long simulation run times. As a consequence of the mass ratio used, both the high frequency electron Bernstein wave and the lower frequency ion Bernstein wave are resolved within a single simulation run. The simulations presented here use isotropic three-dimensional kappa velocity distributions as well as the widely used Maxwellian velocity distribution, and the results from using each of these velocity distributions are analysed and compared. The behaviour of the Bernstein waves is found to be significantly dependent on the spectral index, κ, of the kappa distribution in all frequency domains of the Bernst...