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Test-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electrons


Metadata FieldValueLanguage
dc.creatorda Silva, C. L.
dc.creatorDenton, R. E.
dc.creatorHudson, M. K.
dc.creatorMillan, R. M.
dc.creatorLiu, K.
dc.creatorBortnik, J.
dc.date.accessioned2020-05-27T21:49:26Z
dc.date.available2020-05-27T21:49:26Z
dc.date.created2018
dc.identifier10.1029/2018GL077877en_US
dc.identifier.urihttps://agupubs-onlinelibrary-wiley-com.spot.lib.auburn.edu/doi/epdf/10.1029/2018GL077877en_US
dc.identifier.urihttp://hdl.handle.net/11200/49822
dc.description.abstractUsing test-particle simulations, we describe (in 2-D) the interaction of an ensemble of electrons with a discrete whistler-mode wave packet, which propagates with a moderate wave-normal angle with respect to the background magnetic field. We evaluate both the average transport coefficients used in quasi-linear diffusion transport and also the full nonlinear wave-particle interactions. The magnitude of the calculated diffusion coefficients is found to increase proportionally to the wave amplitude squared, in agreement with quasi-linear diffusion theory. Cyclotron resonance of counterstreaming electrons (n = 1 harmonic number) is more important for pitch angle scattering than Landau resonance. Landau resonance of costreaming electrons (n = 0) is comparable to cyclotron resonance for energy diffusion and advection. Strong acceleration of high pitch angle, costreaming electrons arises in nonlinear wave-particle interactions with high-amplitude waves. In our simulations with zero parallel electric field, the energy source for electron acceleration is the wave's perpendicular electric field, in both the cyclotron and Landau resonances. The Landau resonance can happen even with zero parallel electric field, if the wave packet propagates with a finite wave-normal angle. This resonance between the particle's azimuthal velocity and the wave fields leads to trapping and substantial parallel acceleration.en_US
dc.formatPDFen_US
dc.relation.ispartofGeophysical Research Lettersen_US
dc.relation.ispartofseries0094-8276en_US
dc.rights© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.subjectchorusen_US
dc.subjectcyclotron resonanceen_US
dc.subjectdiffusionen_US
dc.subjectfielden_US
dc.subjectLandau resonanceen_US
dc.subjectlocal accelerationen_US
dc.subjectlossesen_US
dc.subjectmagnetosphereen_US
dc.subjectplasmaen_US
dc.subjectradiation beltsen_US
dc.subjectwave-particle interactionsen_US
dc.subjectwhistler-mode wavesen_US
dc.titleTest-Particle Simulations of Linear and Nonlinear Interactions Between a 2-D Whistler-Mode Wave Packet and Radiation Belt Electronsen_US
dc.typeCollectionen_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume45en_US
dc.citation.issue11en_US
dc.citation.spage5234en_US
dc.citation.epage5245en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US

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