Spontaneous emission of electromagnetic fluctuations in Kappa magnetized plasmas
Spontaneous emission of electromagnetic fluctuations in Kappa magnetized plasmas
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DOI：
10.1088/1361-6587/aa8898
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发表时间：
2017-10
影响因子：
2.2
通讯作者：
Sunjung Kim;R. Schlickeiser;P. Yoon;R. A. López;M. Lazar
中科院分区：
文献类型：
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作者：
Sunjung Kim;R. Schlickeiser;P. Yoon;R. A. López;M. Lazar
本文建立了磁化等离子体中含有粒子的自发发射电磁涨落理论，该理论具有各向异性超热（bi-Kappa）速度分布函数。该方法一般适用于任意波矢方向和波的极化，以及任意波频范围。作为一个具体的应用，在上混合和多谐波电子回旋频率范围内发射的高频电磁起伏进行了评估。通过与粒子模拟的比较，证实了模型的预测。理论分析和数值模拟进行各向同性Kappa，但形式主义可以适用于任何各向异性分布，以及较低的频率范围内，涉及的离子响应。
The present paper formulates the theory of spontaneously emitted electromagnetic (EM) fluctuations in magnetized plasmas containing particles with an anisotropic suprathermal (bi-Kappa) velocity distribution function. The formalism is general applying for an arbitrary wave vector orientation and wave polarization, and for any wave-frequency range. As a specific application, the high-frequency EM fluctuations emitted in the upper-hybrid and multiple harmonic electron cyclotron frequency range are evaluated. The model predictions are confirmed by a comparison with the particle-in-cell simulations. Theoretical analysis and numerical simulations are carried out for an isotropic Kappa but the formalism can be applied for any anisotropic distributions, as well as for lower frequencies ranges which involve the ion response.