存在外部磁场时的魏贝尔不稳定性：分析结果

IF 0.8 4区地球科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Radiophysics and Quantum Electronics Pub Date : 2024-07-06 DOI:10.1007/s11141-024-10326-7

N. A. Emelyanov, Vl. V. Kocharovsky

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引用次数: 0

摘要

我们对无碰撞双麦克斯韦等离子体中的魏贝尔型电子不稳定性进行了频散分析，该等离子体的外磁场与各向异性轴对齐，对应于最高温度。对于波矢量和电场矢量分别垂直于和平行于外场的普通模式扰动，研究发现了不稳定模式的波数范围、增长率、最大增长率以及相应的最佳波数与等离子体密度和各向异性以及外磁场的函数关系。此外，还估算了抑制这些模式不稳定性的外部磁场和在非线性阶段使其饱和的 r.m.s. 产生的磁场。

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Weibel Instability in the Presence of an External Magnetic Field: Analytical Results

We perform dispersion analysis of the Weibel-type electron instability in collisionless bi-Maxwellian plasma with an external magnetic field aligned with the anisotropy axis, which corresponds to the highest temperature. The range of the wave numbers of unstable modes, their growth rates, maximum growth rates, and the corresponding optimal wave number as a function of the density and anisotropy of the plasma and the external magnetic field are found for ordinary mode perturbations with the wave vector and the vector of the electric field being perpendicular and parallel to the external field, respectively. The external magnetic field, which suppresses the instability of these modes, and the r.m.s. generated magnetic field, which saturates it at the nonlinear stage, are also estimated.

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来源期刊

Radiophysics and Quantum Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED

CiteScore

1.10

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as: Radio astronomy; Plasma astrophysics; Ionospheric, atmospheric and oceanic physics; Radiowave propagation; Quantum radiophysics; Pphysics of oscillations and waves; Physics of plasmas; Statistical radiophysics; Electrodynamics; Vacuum and plasma electronics; Acoustics; Solid-state electronics. Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April. All articles are peer-reviewed.