Quantifying Extremely Rapid Flux Enhancements of Radiation Belt Relativistic Electrons Associated with Radial Diffusion

dc.contributor.ORCID0000-0001-8465-9395 (Liu, S)
dc.contributor.ORCID0000-0001-9178-5920 (He, Z)
dc.contributor.authorLiu, Si
dc.contributor.authorYan, Qi
dc.contributor.authorYang, Chang
dc.contributor.authorZhou, Qinghua
dc.contributor.authorHe, Zhaoguo
dc.contributor.authorHe, Yihua
dc.contributor.authorGao, Zhonglei
dc.contributor.authorXiao, Fuliang
dc.contributor.utdAuthorLiu, Si
dc.contributor.utdAuthorHe, Zhaoguo
dc.date.accessioned2019-08-01T19:34:55Z
dc.date.available2019-08-01T19:34:55Z
dc.date.created2018-02-12
dc.descriptionIncludes supplementary material
dc.description.abstractPrevious studies have revealed a typical picture that seed electrons are transported inward under the drive of radial diffusion and then accelerated via chorus to relativistic energies. Here we show a potentially different process during the 2-3 October 2013 storm when Van Allen Probes observed extremely rapid (by about 50 times in 2h) flux enhancements of relativistic (1.8-3.4 MeV) electrons but without distinct chorus at lower L-shells. Meanwhile, Time History of Events and Macroscale Interactions during Substorms satellites simultaneously measured enhanced chorus and fluxes of energetic (~100- 300keV) seed electrons at higher L-shells. Numerical calculations show that chorus can efficiently accelerate seed electrons at L ~8.3. Then radial diffusion further increased the phase space density of relativistic electrons throughout the outer radiation belts, with a remarkable agreement with the observation in magnitude and timescale. The current results provide a different physical scenario on the interplay between radial diffusion and local acceleration in outer radiation belt.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.departmentWilliam B. Hanson Center for Space Sciences
dc.description.sponsorshipNational Natural Science Foundation of China. Grant Numbers: 41504125, 41531072, 41404130, 41674166.
dc.identifier.bibliographicCitationLiu, Si, Qi Yan, Chang Yang, Qinghua Zhou, et al. 2018. "Quantifying extremely rapid flux enhancements of radiation belt relativistic electrons associated with radial diffusion." Geophysical Research Letters 45(3): 1262-1270, doi:10.1002/2017GL076513
dc.identifier.issn0094-8276
dc.identifier.issue3
dc.identifier.urihttps://hdl.handle.net/10735.1/6765
dc.identifier.volume45
dc.language.isoen
dc.publisherAmer Geophysical Union
dc.relation.urihttp://dx.doi.org/10.1002/2017GL076513
dc.rights©2018 American Geophysical Union. All Rights Reserved.
dc.source.journalGeophysical Research Letters
dc.subjectRadiation belts
dc.subjectPhase space (Statistical physics)
dc.subjectMagnetic storms
dc.subjectMagnetometers
dc.subjectParticles (Nuclear physics)
dc.subjectGeology
dc.titleQuantifying Extremely Rapid Flux Enhancements of Radiation Belt Relativistic Electrons Associated with Radial Diffusion
dc.type.genrearticle

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