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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The Hall Electric Field in Earth's Magnetotail Thin Current Sheet
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The Hall Electric Field in Earth's Magnetotail Thin Current Sheet

机译:大厅地球磁尾的电场薄电流片

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摘要

One of the most important properties of Earth's magnetotail thin current sheet (TCS) is that its current is predominantly contributed by magnetized electrons. The Hall electric field, normal to the TCS and generated by charge separation, is critical to the generation of this electron current as well as a dawn-dusk asymmetry of the magnetotail, such as duskside preference of magnetic reconnection and related structures and phenomena. However, systematic investigation of the Hall electric field has so far been lacking. Utilizing observations of TCS by Magnetospheric Multiscale and Time History of Events and Macroscale Interactions during Substorm spacecraft, we study the properties of this field. Our results, from various, complementary methods, show that the Hall electric field E_z (in the geocentric solar magnetospheric, coordinate system) or E_n (normal to the TCS plane) can be clearly observed to point toward the center of the current sheet. The typical magnitude of this electric field is several tenths of 1 mV/m. Statistics of Magnetospheric Multiscale magnetotail TCS crossings show that the Hall electric field is stronger on the duskside, indicating a stronger Hall effect there, which confirms predictions from global-scale hybrid and particle-in-cell simulations.
机译:地球的最重要的一个属性磁尾薄电流片(TCS)是它的当前主要是由磁化电子。正常的TCS和产生的费用分离,是至关重要的一代电子电流以及dawn-dusk不对称的磁尾,如duskside偏好磁场重联的和相关的结构和现象。大厅的电场迄今为止缺乏。磁性层的多尺度和时间的历史在事件和大规模交互亚暴飞船,我们研究的性质这一领域。互补的方法,表明了大厅电场E_z(地心太阳磁性层的,坐标系统)或E_n(正常TCS平面)可以清楚地观察到指向当前表的中心。这个电场是典型的大小几个趋近1 mV / m。磁性层的多尺度磁尾TCS口岸表明霍尔电场强duskside,表明更强霍尔效应,证实了预测从全球范围内混合和particle-in-cell模拟。

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