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Competition between acceleration and loss mechanisms of relativistic electrons during geomagnetic storms
Summers, D; Ma, C; Mukai, T
2004-04-24
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN0148-0227
Volume109Issue:A4Pages:A04221
Abstract[1] We demonstrate quantitatively that whether a geomagnetic storm results in an increase or decrease of relativistic electrons in the outer zone depends on the competition between the physical processes producing the energization and loss of electrons. We construct a simplified one-dimensional model for the electron energy distribution incorporating electron energization by cyclotron resonant interaction with whistler-mode chorus, and electron losses due to pitch angle scattering into the loss cone by combined plasma waves ( in particular, electromagnetic ion cyclotron waves and plasmaspheric hiss). We do not include radial diffusion explicitly since the model applies to the region 3 < L < 5 where radial diffusion is expected to be weak. We treat the chorus wave amplitude and electron loss rate as model input variables and compute the solution for the electron energy distribution as the model output. The extent of the electron flux increase or decrease during the event is found to be sensitively controlled by the magnitudes of the wave amplitude and electron loss rate.
KeywordGeomagnetic Storms Outer Radiation Belt Relativistic Electrons
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1029/2004JA010437
WOS KeywordOUTER RADIATION BELT ; MAGNETIC STORM ; OCTOBER 9 ; ENERGIES ; CHORUS ; MAGNETOSPHERE ; ENERGIZATION ; MICROBURSTS ; DIFFUSION ; WAVES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000221087800006
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7766
Collection期刊(老文献)
Affiliation1.Mem Univ Newfoundland, Dept Math & Stat, St John, NF A1C 5S7, Canada
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan
4.Univ KwaZulu Natal, Sch Pure & Appl Phys, Durban, South Africa
Recommended Citation
GB/T 7714
Summers, D,Ma, C,Mukai, T. Competition between acceleration and loss mechanisms of relativistic electrons during geomagnetic storms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2004,109(A4):A04221.
APA Summers, D,Ma, C,&Mukai, T.(2004).Competition between acceleration and loss mechanisms of relativistic electrons during geomagnetic storms.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,109(A4),A04221.
MLA Summers, D,et al."Competition between acceleration and loss mechanisms of relativistic electrons during geomagnetic storms".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 109.A4(2004):A04221.
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