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Review of modeling of losses and sources of relativistic electrons in the outer radiation belt II: Local acceleration and loss

Shprits, Yuri Y.; Subbotin, Dmitriy A.; Meredith, Nigel P.; Elkington, Scot R.. 2008 Review of modeling of losses and sources of relativistic electrons in the outer radiation belt II: Local acceleration and loss. Journal of Atmospheric and Solar-Terrestrial Physics, 70 (14). 1694-1713. 10.1016/j.jastp.2008.06.014

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Abstract/Summary

This paper focuses on the modeling of local acceleration and loss processes in the outer radiation belt. We begin by reviewing the statistical properties of waves that violate the first and second adiabatic invariants, leading to the loss and acceleration of high energy electrons in the outer radiation belt. After a brief description of the most commonly accepted methodology for computing quasi-linear diffusion coefficients, we present pitch-angle scattering simulations by (i) plasmaspheric hiss, (ii) a combination of plasmaspheric hiss and electromagnetic ion cyclotron (EMIC) waves, (iii) chorus waves, and (iv) a combination of chorus and EMIC waves. Simulations of the local acceleration and loss processes show that statistically, the net effect of chorus waves is acceleration at MeV energies and loss at hundreds of keV energies. The combination of three-dimensional (3D) simulations of the local processes and radial transport show that the complexity of the behavior of the radiation belts is due to a number of competing processes of acceleration and loss, and depends on the dynamics of the plasmasphere, ring current, and solar wind conditions.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.jastp.2008.06.014
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections
ISSN: 1364-6826
Additional Keywords: Radiation belts, Local acceleration, Local loss, Modelling
NORA Subject Terms: Space Sciences
Date made live: 21 Jan 2009 13:38
URI: http://nora.nerc.ac.uk/id/eprint/5734

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