Evidence of Microbursts Observed Near the Equatorial Plane in the Outer Van Allen Radiation Belt

被引：21

作者：

Shumko, Mykhaylo ^{[1
,2
]}

Turner, Drew L. ^{[2
]}

O'Brien, T. P. ^{[2
]}

Claudepierre, Seth G. ^{[2
]}

Sample, John ^{[1
]}

Hartley, D. P. ^{[3
]}

Fennel, Joseph ^{[2
]}

Blake, J. Bernard ^{[2
]}

Gkioulidou, Matina ^{[4
]}

Mitchell, Donald G. ^{[4
]}

机构：

[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[2] Aerosp Corp, Space Sci Applicat Lab, POB 92957, Los Angeles, CA 90009 USA

[3] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[4] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 16期

关键词：

RELATIVISTIC ELECTRON MICROBURSTS; AURORAL-ZONE; PRECIPITATION; ACCELERATION; DIFFUSION; SAMPEX; STORMS;

D O I：

10.1029/2018GL078451

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present the first evidence of electron microbursts observed near the equatorial plane in Earth's outer radiation belt. We observed the microbursts on 31 March 2017 with the Magnetic Electron Ion Spectrometer and Radiation Belt Storm Probes Ion Composition Experiment on the Van Allen Probes. Microburst electrons with kinetic energies of 29-92keV were scattered over a substantial range of pitch angles, and over time intervals of 150-500ms. Furthermore, the microbursts arrived without dispersion in energy, indicating that they were recently scattered near the spacecraft. We have applied the relativistic theory of wave-particle resonant diffusion to the calculated phase space density, revealing that the observed transport of microburst electrons is not consistent with the hypothesized quasi-linear approximation.

引用

页码：8044 / 8053

页数：10

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