Bibliography
Notice:

Found 2 entries in the Bibliography.
Showing entries from 1 through 2
2018 
Electron nonlinear resonant interaction with short and intense parallel chorus wavepackets One of the major drivers of radiation belt dynamics, electron resonant interaction with whistlermode chorus waves, is traditionally described using the quasilinear diffusion approximation. Such a description satisfactorily explains many observed phenomena, but its applicability can be justified only for sufficiently low intensity, long duration waves. Recent spacecraft observations of a large number of very intense lower band chorus waves (with magnetic field amplitudes sometimes reaching \~1\% of the background) therefore challenge this traditional description, and call for an alternative approach when addressing the global, longterm effects of the nonlinear interaction of these waves with radiation belt electrons. In this paper, we first use observations from the Van Allen Probes and Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft to show that the majority of intense parallel chorus waves consists of relatively short wavepackets. Then, we construct a kinetic equation describing the nonlinear resonant interaction of radiation belt electrons with such short and intense wavepackets. We demonstrate that this peculiar type of nonlinear interaction produces similar effects as quasilinear diffusion, i.e., a flattening of the electron velocity distribution function within a certain energy/pitchangle range. The main difference is the much faster evolution of the electron distribution when nonlinear interaction prevails. Mourenas, D.; Zhang, X.J.; Artemyev, A.; Angelopoulos, V.; Thorne, R.; Bortnik, J.; Neishtadt, A.; Vasiliev, A.; Published by: Journal of Geophysical Research: Space Physics Published on: 05/2018 YEAR: 2018 DOI: 10.1029/2018JA025417 chorus waves; ; kinetic equation; nonlinear interaction; Radiation belts; short wavepackets; trapping; Van Allen Probes 
2014 
Fast transport of resonant electrons in phase space due to nonlinear trapping by whistler waves 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. Artemyev, A.; Vasiliev, A.; Mourenas, D.; Agapitov, O.; Krasnoselskikh, V.; Boscher, D.; Rolland, G.; Published by: Geophysical Research Letters Published on: 08/2014 YEAR: 2014 DOI: 10.1002/grl.v41.1610.1002/2014GL061380 particle trapping; Radiation belts; Waveparticle interaction 
1