Extremely Collimated Electron Beams in the High Latitude Magnetosphere Observed by Arase
Extremely Collimated Electron Beams in the High Latitude Magnetosphere Observed by Arase
复制标题
Arase 观测到的高纬度磁层中的极端准直电子束
DOI：
10.1029/2020gl090522
复制
发表时间：
2021
影响因子：
5.2
通讯作者：
Shinohara I.
中科院分区：
文献类型：
--
作者：
Kazama Y.;Kojima H.;Miyoshi Y.;Kasahara Y.;Kasahara S.;Usui H.;Wang B.‐J.;Wang S.‐Y.;Tam S. W. Y.;Chang T.‐F.;Asamura K.;Kasaba Y.;Matsuda S.;Shoji M.;Matsuoka A.;Teramoto M.;Takashima T.;Shinohara I.
本报告介绍Arase卫星在磁层高纬度观测到的电子束。根据精细的角通道测量，束电子主要从地球流走，并且被很好地准直到几度之内。一项统计研究表明，当Arase位于Lm> 105时，可以看到光束，并且随着磁层变得活跃，光束出现的频率更高。束流事件的场线被追溯到典型的极光椭圆。的统计特性的光束是一致的解释，电离层电子加速的极光电位结构的平行电场，并向上流到高纬度磁层。
This report describes electron beams observed at high latitudes in the magnetosphere by the Arase satellite. According to fine angular channel measurements, beam electrons are mainly flowing away from the Earth, and are well collimated to within a few degrees. A statistical study indicates that the beams are seen when Arase is located atLm> ∼5, and more frequently as the magnetosphere becomes active. The field lines of the beam events are traced back to the typical auroral ovals. The statistical properties of the beams are consistent with the interpretation that ionospheric electrons are accelerated by a parallel electric field of an auroral potential structure and are streaming upward to the high latitude magnetosphere.