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


AuthorSHPRITS, Y; SUBBOTIN, D; MEREDITH, N; ELKINGTON, S;
KeywordsLocal Acceleration due to Wave-Particle Interaction
AbstractThis 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.
Year of Publication2008
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume70
Number of Pages1694-1713
Section
Date Published11/2008
ISBN
URLhttp://www.sciencedirect.com/science/article/pii/S1364682608001673
DOI10.1016/j.jastp.2008.06.014