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Electron source associated with dipolarization at the outer boundary of the radiation belts: Non-storm cases
Lui, A. T. Y.; Zong, Q. -G.; Wang, C.; Dunlop, M. W.; Lui, ATY (reprint author), Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2012
Volume117Pages:A10224
ISSN2169-9380
Language英语
AbstractWe examine the strength of the electron source associated with dipolarization at the outer boundary of the radiation belts using multisatellite observations from THEMIS. This topic is relevant to the determination on the relative roles of inward radial diffusion versus internal local acceleration for the origin of the relativistic electrons in the outer radiation belt. We focus on the electron phase space density (PSD) as a function of the first adiabatic invariant (mu) for equatorially mirroring population over a broad energy range. It is found that the source strength associated with dipolarization for non-storm periods at the outer boundary of the radiation belts can be well above the observed fluxes of relativistic electrons inside the outer radiation belt. The PSD change due to the magnetic field strength variation dominates over PSD change from the energy flux increase with dipolarization, resulting in a strong anticorrelation between magnetic field strength and PSD values at a given mu. If observations from closely spaced satellites during the same event can be used to indicate radial transport of electrons with dipolarization, then the observed PSD at these satellites indicates frequent occurrence of non-adiabatic process during their radial transport.; We examine the strength of the electron source associated with dipolarization at the outer boundary of the radiation belts using multisatellite observations from THEMIS. This topic is relevant to the determination on the relative roles of inward radial diffusion versus internal local acceleration for the origin of the relativistic electrons in the outer radiation belt. We focus on the electron phase space density (PSD) as a function of the first adiabatic invariant (mu) for equatorially mirroring population over a broad energy range. It is found that the source strength associated with dipolarization for non-storm periods at the outer boundary of the radiation belts can be well above the observed fluxes of relativistic electrons inside the outer radiation belt. The PSD change due to the magnetic field strength variation dominates over PSD change from the energy flux increase with dipolarization, resulting in a strong anticorrelation between magnetic field strength and PSD values at a given mu. If observations from closely spaced satellites during the same event can be used to indicate radial transport of electrons with dipolarization, then the observed PSD at these satellites indicates frequent occurrence of non-adiabatic process during their radial transport.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3201
Collection空间科学部
Corresponding AuthorLui, ATY (reprint author), Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA.
Recommended Citation
GB/T 7714
Lui, A. T. Y.,Zong, Q. -G.,Wang, C.,et al. Electron source associated with dipolarization at the outer boundary of the radiation belts: Non-storm cases[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117:A10224.
APA Lui, A. T. Y.,Zong, Q. -G.,Wang, C.,Dunlop, M. W.,&Lui, ATY .(2012).Electron source associated with dipolarization at the outer boundary of the radiation belts: Non-storm cases.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117,A10224.
MLA Lui, A. T. Y.,et al."Electron source associated with dipolarization at the outer boundary of the radiation belts: Non-storm cases".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012):A10224.
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