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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Kinetic Alfven Waves Near a Dissipative Layer
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Kinetic Alfven Waves Near a Dissipative Layer

机译：动能耗散层附近的阿尔芬波

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摘要

The spatial structure of kinetic Alfven waves near a dissipative layer is examined. The type of dispersion for kinetic Alfven waves (KAWs) changes inside the dissipative layer: from "cold," when the transverse (across the magnetic shells) wavelength is determined by the electron skin depth in plasma, to "warm" dispersion, when the wavelength is determined by the ion Larmor radius. The characteristic transverse length of a KAW is complex in the dissipative layer, because it decays strongly when interacting with background plasma electrons. The features of phase shifts between the transverse electromagnetic field components of Alfven oscillations are considered. Phase shift can be used to identify the type of Alfven waves observed by satellites in the vicinity of the dissipative layer. The Alfven wave energy absorption in the dissipative layer can lead to the formation of electron fluxes (with electron energies of 2-5 eV) toward the ionosphere and initiate here the stable auroral red (SAR) arcs. An analytical formula is proposed for determining the density of the electron flux toward the ionosphere and the flux of the energy transferred by them.
机译：动力学阿尔芬波附近的空间结构检查一个耗散层。动力学阿尔芬波色散(caw)改变内部耗散层:从“冷”,当横向(磁波长是由电子壳)在等离子皮肤深度,“温暖”分散,当波长是由离子拉莫尔进动半径。乌鸦在耗散层是复杂的,因为它强烈交互时衰减背景等离子体电子。横向之间的相移阿尔芬的电磁场组件振荡。用于识别阿尔芬波的类型观察到附近的卫星耗散层。在耗散层会导致吸收电子通量(电子的形成2 - 5的能量向电离层和eV)启动这里稳定的红色极光(SAR)弧。提出了确定分析公式电子通量向的密度电离层的通量和能量转移通过他们。

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