Modeling Energetic Electron Nonlinear Wave-Particle Interactions with Electromagnetic Ion Cyclotron Waves

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dc.contributor.ORCID0000-0003-2489-3571 (Chen, L)
dc.contributor.ORCID0000-0001-9068-4431 (Zheng, L)
dc.contributor.ORCID0000-0003-3556-8096 (Zhu, H)
dc.contributor.authorZheng, Liheng
dc.contributor.authorChen, Lunjin
dc.contributor.authorZhu, Hui
dc.contributor.utdAuthorZheng, Liheng
dc.contributor.utdAuthorChen, Lunjin
dc.contributor.utdAuthorZhu, Hui
dc.date.accessioned2020-04-07T00:16:51Z
dc.date.available2020-04-07T00:16:51Z
dc.date.issued2019-04-15
dc.description.abstractElectromagnetic ion cyclotron (EMIC) waves in duskside plasmasphere and plasmaspheric plume scatter megaelectron volt electrons into the loss cone and are considered a major loss mechanism for the outer radiation belt. Wave-particle interaction between energetic electrons and EMIC waves has been studied extensively by the quasi-linear diffusion theory. However, EMIC waves are typically strong enough to trigger nonlinear wave-particle interaction effects and transport electrons in very different ways from quasi-linear diffusion. New mathematical method is therefore in demand to study the evolution of energetic electron distribution in response to nonlinear wave-particle interaction. In this work, we present a Markov chain description of the wave-particle interaction process, in which the electron distribution is represented by a state vector and is evolved by the Markov matrix. The Markov matrix is a matrix form of the electron response Green's function and could be determined from test particle simulations. Our modeling results suggest that electron loss rate is not significantly affected by phase bunching and phase trapping, but for strong EMIC waves, electron distribution is more saturated near loss cone than quasi-linear theory prediction, and negative electron phase space density slope develops inside loss cone. ©2019. American Geophysical Union. All Rights Reserved.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.departmentWilliam B. Hanson Center for Space Sciences
dc.identifier.bibliographicCitationZheng, L., L. Chen, and H. Zhu. 2019. "Modeling Energetic Electron Nonlinear Wave-Particle Interactions with Electromagnetic Ion Cyclotron Waves." Journal of Geophysical Research: Space Physics 124(5): 3436-3453, doi: 10.1029/2018JA026156
dc.identifier.issn2169-9380
dc.identifier.issue5
dc.identifier.urihttp://dx.doi.org/10.1029/2018JA026156
dc.identifier.urihttps://hdl.handle.net/10735.1/7852
dc.identifier.volume124
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.rights©2019 American Geophysical Union. All Rights Reserved
dc.source.journalJournal of Geophysical Research: Space Physics
dc.subjectCyclotron waves
dc.subjectFokker-Planck equation
dc.subjectMarkov processes
dc.subjectComputer simulation
dc.subjectRadiation belts
dc.subjectPlasmasphere
dc.titleModeling Energetic Electron Nonlinear Wave-Particle Interactions with Electromagnetic Ion Cyclotron Waves
dc.type.genrearticle

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