Resonant scattering of energetic electrons by unusual low-frequency hiss
Author | |
Keywords | |
Abstract |
We quantify the resonant scattering effects of the unusual low-frequency dawnside plasmaspheric hiss observed on 30 September 2012 by the Van Allen Probes. In contrast to normal (~100\textendash2000 Hz) hiss emissions, this unusual hiss event contained most of its wave power at ~20\textendash200 Hz. Compared to the scattering by normal hiss, the unusual hiss scattering speeds up the loss of ~50\textendash200 keV electrons and produces more pronounced pancake distributions of ~50\textendash100 keV electrons. It is demonstrated that such unusual low-frequency hiss, even with a duration of a couple of hours, plays a particularly important role in the decay and loss process of energetic electrons, resulting in shorter electron lifetimes for ~50\textendash400 keV electrons than normal hiss, and should be carefully incorporated into global modeling of radiation belt electron dynamics during periods of intense injections.
|
Year of Publication |
2014
|
Journal |
Geophysical Research Letters
|
Volume |
41
|
Number of Pages |
1854-1861
|
Date Published |
03/2014
|
URL |
http://doi.wiley.com/10.1002/2014GL059389
|
DOI |
10.1002/2014GL059389
|
Download citation |