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Correlated observations and simulations on the buildup of radiation belt electron fluxes driven by substorm injections and chorus waves
He, Zhaoguo; Zhu, Hui; Liu, Siqing; Zong, Qiugang; Wang, Yongfu; Lin, Ruilin; Shi, Liqin; Gong, Jiancun; Liu, SQ (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Department空间环境部
Source PublicationASTROPHYSICS AND SPACE SCIENCE
2015
Volume355Issue:2Pages:245-251
ISSN0004-640X
Language英语
KeywordRadiation Belt Substorm Seed Electron Injection Chorus Waves Acceleration Energetic Electron
AbstractWe report the multi-satellite (LANL, GOES-10 and Cluster) observation data of electron flux evolutions and chorus wave excitation in the radiation belt during the geomagnetic storm and substorm from 10 to 14 January, 2002. The seed (50-225 keV) electron flux increased 50 times in five hours during the storm main phase, and the relativistic (>0.6 MeV) electron flux increased about 60 times at night side during the recovery phase. In the meanwhile, the Cluster satellites detected intense chorus waves (the wave power up to similar to 10(-3) nT(2) Hz(-1)) at MLT approximate to 3 when passing through the outer radiation belt. Using a Gaussian fit to the observed chorus spectra, we calculate the drift-averaged diffusion coefficients and then solve a 2-D Fokker-Planck diffusion equation. We simulate the energetic electron flux evolutions driven by chorus waves in two cases: with and without seed electron injections. We show that the energetic electron flux increases 79 times in three days with injection, comparable to the observation. However, the flux increases only 3 times in three days without injection, far below the observation. The current results suggest that the injected seed electrons and chorus waves play important roles in the buildup of the radiation belt electrons.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4579
Collection空间环境部
Corresponding AuthorLiu, SQ (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
He, Zhaoguo,Zhu, Hui,Liu, Siqing,et al. Correlated observations and simulations on the buildup of radiation belt electron fluxes driven by substorm injections and chorus waves[J]. ASTROPHYSICS AND SPACE SCIENCE,2015,355(2):245-251.
APA He, Zhaoguo.,Zhu, Hui.,Liu, Siqing.,Zong, Qiugang.,Wang, Yongfu.,...&Liu, SQ .(2015).Correlated observations and simulations on the buildup of radiation belt electron fluxes driven by substorm injections and chorus waves.ASTROPHYSICS AND SPACE SCIENCE,355(2),245-251.
MLA He, Zhaoguo,et al."Correlated observations and simulations on the buildup of radiation belt electron fluxes driven by substorm injections and chorus waves".ASTROPHYSICS AND SPACE SCIENCE 355.2(2015):245-251.
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