Large amplitude electric and magnetic field signatures in the inner magnetosphere during injection of 15 MeV electron drift echoes
Large amplitude electric and magnetic field signatures in the inner magnetosphere during injection of 15 MeV electron drift echoes
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DOI：
10.1029/94gl00375
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发表时间：
1994-08
影响因子：
5.2
通讯作者：
J. Wygant;F. Mozer;M. Temerin;J. Blake;N. Maynard;H. Singer;M. Smiddy
中科院分区：
文献类型：
--
作者：
J. Wygant;F. Mozer;M. Temerin;J. Blake;N. Maynard;H. Singer;M. Smiddy
1991年3月24日，在一次强风暴突然开始（SSC）期间，CRRES航天器在当地地磁时间0300附近测量了L值为2.2至2.6的电场和磁场。SSC时航天器上的电场特征表现为大振幅振荡（峰间80 mV/m），其周期对应于同时观测到的15 MeV电子的150秒漂移回波周期。考虑到以前的统计研究的大小SSC的电场和磁场与当地时间和分析的粒子的横向和横向L运输意味着存在200至300 mV/m的电场在大部分的昼侧磁层。这些观测结果还表明，15 MeV的漂移回波电子被选择性地激励，因为它们的梯度漂移速度允许它们在电场加速阶段的持续时间内驻留在强电场区域。参考文献10篇，3图。
Electric and magnetic fields were measured by the CRRES spacecraft at an L-value of 2.2 to 2.6 near 0300 magnetic local time during a strong storm sudden commencement (SSC) on March 24, 1991. The electric field signature at the spacecraft at the time of the SSC was characterized by a large amplitude oscillation (80 mV/m peak to peak) with a period corresponding to the 150 second drift echo period of the simultaneously observed 15 MeV electrons. Considerations of previous statistical studies of the magnitude of SSC electric and magnetic fields versus local time and analysis of the energization and cross-L transport of the particles imply the existence of 200 to 300 mV/m electric fields over much of the dayside magnetosphere. These observations also suggest that the 15 MeV drift echo electrons were selectively energized because their gradient drift velocity allowed them to reside in the region of strong electric fields for the duration of the accelerating phase of the electric field. 10 refs., 3 figs.