Fast transport of resonant electrons in phase space due to nonlinear trapping by whistler waves
Author  
Keywords  
Abstract 
We present an analytical, simplified formulation accounting for the fast transport of relativistic electrons in phase space due to waveparticle resonant interactions in the inhomogeneous magnetic field of Earth\textquoterights radiation belts. We show that the usual description of the evolution of the particle velocity distribution based on the FokkerPlanck equation can be modified to incorporate nonlinear processes of waveparticle interaction, including particle trapping. Such a modification consists in one additional operator describing fast particle jumps in phase space. The proposed, general approach is used to describe the acceleration of relativistic electrons by oblique whistler waves in the radiation belts. We demonstrate that for a wave power distribution with a hard enough power law tail inline image such that η < 5/2, the efficiency of nonlinear acceleration could be more effective than the conventional quasilinear acceleration for 100 keV electrons.

Year of Publication 
2014

Journal 
Geophysical Research Letters

Volume 
41

Number of Pages 
57275733

Date Published 
08/2014

URL 
http://doi.wiley.com/10.1002/grl.v41.16http://doi.wiley.com/10.1002/2014GL061380

DOI 
10.1002/grl.v41.1610.1002/2014GL061380
