ELECTRON-ION WHISTLER INSTABILITIES AND MAGNETIC NOISE BURSTS
ELECTRON-ION WHISTLER INSTABILITIES AND MAGNETIC NOISE BURSTS
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DOI：
10.1029/ja092ia10p11209
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发表时间：
1987-10-01
影响因子：
2.8
通讯作者：
OMIDI, N
中科院分区：
文献类型：
--
作者：
AKIMOTO, K;GARY, SP;OMIDI, N
利用线性Vlasov色散方程研究了两种哨声不稳定性。它们被称为电子/离子平行和倾斜哨声不稳定性，它们是由电子/离子沿磁场的相对漂移驱动的。我们证明，这些不稳定性的增强涨落可以解释在离子束和/或场向电流存在的情况下，等离子体片内和附近的磁噪声爆发的一些特性。在足够高的等离子体β下，这些不稳定性可能会影响磁尾中的电流系统。
Two whistler instabilities are investigated by means of the linear Vlasov dispersion equation. They are called the electron/ion parallel and oblique whistler instabilities and are driven by electron/ion relative drifts along the magnetic field. We demonstrate that the enhanced fluctuations from these instabilities can explain several properties of magnetic noise bursts in and near the plasma sheet in the presence of ion beams and/or field‐aligned currents. At sufficiently high plasma β these instabilities may affect the current system in the magnetotail.