Generation of kinetic Alfven waves in the high-latitude near-Earth magnetotail: A global hybrid simulation
Generation of kinetic Alfven waves in the high-latitude near-Earth magnetotail: A global hybrid simulation
复制标题
高纬度近地磁尾中动能阿尔文波的产生：全局混合模拟
DOI：
10.1063/1.4907666
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发表时间：
2015-02
影响因子：
2.2
通讯作者：
Quanming Lu
中科院分区：
文献类型：
--
作者：
Aimin Du;Xueyi Wang;Mingyu Wu;Quanming Lu
采用二维全球尺度混合模拟方法，研究了近地磁尾等离子体片中的快速流动对高纬地区动力学Alfven波（KAWs）产生的影响.结果表明：首先，在（x，z）=（− 10.5RE，0.3RE）附近，等离子体片变薄，磁场出现双极化，其中RE为地球半径;然后，剪切阿尔芬波被激发在等离子体片，并强烈的向地流被制动的偶极类磁场。这些波随后沿着磁力线向极区传播。随后，由于极区磁场和密度的不均匀性，在高纬磁尾产生了k k的KAWs。电场与磁场的比值在...
In this paper, effects of a fast flow in the tail plasma sheet on the generation of kinetic Alfven waves (KAWs) in the high-latitude of the near-Earth magnetotail are investigated by performing a two-dimensional (2-D) global-scale hybrid simulation, where the plasma flow is initialized by the E×B drift near the equatorial plane due to the existence of the dawn-dusk convection electric field. It is found that firstly, the plasma sheet becomes thinned and the dipolarization of magnetic field appears around (x,z)=(−10.5RE,0.3RE), where RE is the radius of the Earth. Then, shear Alfven waves are excited in the plasma sheet, and the strong earthward flow is braked by the dipole-like magnetic field. These waves propagate along the magnetic field lines toward the polar regions later. Subsequently, KAWs with k⊥≫k∥ are generated in the high-latitude magnetotail due to the existence of the non-uniformity of the magnetic field and density in the polar regions. The ratio of the electric field to the magnetic field in...
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影响因子：
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作者：
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通讯作者：
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影响因子：
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影响因子：
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影响因子：
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