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dc.contributor.authorOmura, Yoshiharuen
dc.contributor.authorHsieh, Yi‐Kaien
dc.contributor.authorFoster, John C.en
dc.contributor.authorErickson, Philip J.en
dc.contributor.authorKletzing, Craig A.en
dc.contributor.authorBaker, Daniel N.en
dc.contributor.alternative大村, 善治ja
dc.date.accessioned2019-07-04T06:55:12Z-
dc.date.available2019-07-04T06:55:12Z-
dc.date.issued2019-04-
dc.identifier.issn2169-9380-
dc.identifier.issn2169-9402-
dc.identifier.urihttp://hdl.handle.net/2433/242869-
dc.description.abstractEfficient acceleration of relativistic electrons at Landau resonance with obliquely propagating whistler‐mode chorus emissions is confirmed by theory, simulation, and observation. The acceleration is due to the perpendicular component of the wave electric field. We first review theoretical analysis of nonlinear motion of resonant electrons interacting with obliquely propagating whistler‐mode chorus. We have derived formulae of inhomogeneity factors for Landau and cyclotron resonances to analyze nonlinear wave trapping of energetic electrons by an obliquely propagating chorus element. We performed test particle simulations to confirm that nonlinear wave trapping by both Landau and cyclotron resonances can take place for a wide range of energies. For an element of large amplitude chorus waves observed by the Van Allen Probes, we have performed detailed analyses of the wave form data based on theoretical framework of nonlinear trapping of resonant electrons. We compare the efficiencies of accelerations by cyclotron and Landau resonances. We find significant acceleration can take place both in Landau and cyclotron resonances. What controls the dynamics of relativistic electrons in the Landau resonance is the perpendicular field components rather than the parallel electric field of the oblique chorus wave. In evaluating the efficiency of nonlinear trapping, we have taken into account variation of the wave trapping potential structure controlled by the inhomogeneity factors.en
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherAmerican Geophysical Union (AGU)en
dc.rights©2019. American Geophysical Union.en
dc.rightsThe full-text file will be made open to the public on 17 November 2019 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.en
dc.subjectwave particle interactionen
dc.subjectnonlinear processen
dc.subjectwhistler‐mode chorusen
dc.subjectradiation beltsen
dc.subjectinner magnetosphereen
dc.subjectrelativistic electronsen
dc.titleCyclotron Acceleration of Relativistic Electrons Through Landau Resonance With Obliquely Propagating Whistler‐Mode Chorus Emissionsen
dc.typejournal article-
dc.type.niitypeJournal Article-
dc.identifier.jtitleJournal of Geophysical Research: Space Physicsen
dc.identifier.volume124-
dc.identifier.issue4-
dc.identifier.spage2795-
dc.identifier.epage2810-
dc.relation.doi10.1029/2018JA026374-
dc.textversionpublisher-
dc.addressResearch Institute for Sustainable Humanosphere, Kyoto Universityen
dc.addressResearch Institute for Sustainable Humanosphere, Kyoto Universityen
dc.addressHaystack Observatory, Massachusetts Institute of Technologyen
dc.addressHaystack Observatory, Massachusetts Institute of Technologyen
dc.addressDepartment of Physics and Astronomy, University of Iowaen
dc.addressLaboratory for Atmospheric and Space Physics, University of Colorado Boulderen
dcterms.accessRightsopen access-
datacite.date.available2019-11-17-
datacite.awardNumber15H05815-
datacite.awardNumber17H06140-
jpcoar.funderName日本学術振興会ja
jpcoar.funderName日本学術振興会ja
jpcoar.funderName.alternativeJapan Society for the Promotion of Science (JSPS)en
jpcoar.funderName.alternativeJapan Society for the Promotion of Science (JSPS)en
出現コレクション:学術雑誌掲載論文等

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