The role of the convection electric field in filling the slot region between the inner and outer radiation belts

被引:32
作者
Califf, S. [1 ]
Li, X. [1 ]
Zhao, H. [1 ]
Kellerman, A. [2 ]
Sarris, T. E. [3 ]
Jaynes, A. [1 ]
Malaspina, D. M. [1 ]
机构
[1] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA
[2] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
[3] Democritus Univ Thrace, Dept Elect Engn, Xanthi, Greece
关键词
LARGE-SCALE; LOCAL ACCELERATION; MAGNETOSPHERE; DYNAMICS; CHORUS; THEMIS; WAVES; ZONE;
D O I
10.1002/2016JA023657
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Van Allen Probes have reported frequent flux enhancements of 100s keV electrons in the slot region, with lower energy electrons exhibiting more dynamic behavior at lower L shells. Also, in situ electric field measurements from the Combined Release and Radiation Effects Satellite, Time History of Events and Macroscale Interactions during Substorms (THEMIS), and the Van Allen Probes have provided evidence for large-scale electric fields at low L shells during active times. We study an event on 19 February 2014 where hundreds of keV electron fluxes were enhanced by orders of magnitude in the slot region and electric fields of 1-2 mV/m were observed below L = 3. Using a 2-D guiding center particle tracer and a simple large-scale convection electric field model, we demonstrate that the measured electric fields can account for energization of electrons up to at least 500 keV in the slot region through inward radial transport.
引用
收藏
页码:2051 / 2068
页数:18
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