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Rapid loss of the plasma sheet energetic electrons associated with the growth of whistler mode waves inside the bursty bulk flows
Li, L. Y.; Yu, J.; Cao, J. B.; Zhang, D.; Wei, X. H.; Rong, Z. J.; Yang, J. Y.; Fu, H. S.; Li, LY (reprint author), Beihang Univ, Sch Astronaut, XueYuan Rd 37, Beijing 100191, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2013
Volume118Issue:11Pages:7200-7210
ISSN2169-9380
Language英语
KeywordPlasma Sheet Bursty Bulk Flow Energetic Electron Loss Anisotropy Of Electron Temperature Whistler Mode Wave Growth Pitch Angle Scattering
AbstractDuring the interval similar to 07:45:36-07:54:24UT on 24 August 2005, Cluster satellites (C1 and C3) observed an obvious loss of energetic electrons (similar to 3.2-95keV) associated with the growth of whistler mode waves inside some bursty bulk flows (BBFs) in the midtail plasma sheet (X-GSM similar to-17.25 R-E). However, the fluxes of the higher-energy electrons (128keV) and energetic ions (10-160keV) were relatively stable in the BBF-impacted regions. The energy-dependent electron loss inside the BBFs is mainly due to the energy-selective pitch angle scatterings by whistler mode waves within the time scales from several seconds to several minutes, and the electron scatterings in different pitch angle distributions are different in the wave growth regions. The plasma sheet energetic electrons have mainly a quasi-perpendicular pitch angle distribution (30 degrees<<150 degrees) during the expansion-to-recovery development of a substorm (AE index decreases from 1677nT to 1271nT), and their loss can occur at almost all pitch angles in the wave growth regions inside the BBFs. Unlike the energetic electrons, the low-energy electrons (similar to 0.073-2.1keV) have initially a field-aligned pitch angle distribution (0 degrees 30 degrees and 150 degrees 180 degrees) in the absence of whistler mode waves, and their loss in field-aligned directions is accompanied by their increase in quasi-perpendicular directions in the wave growth regions, but the loss of the low-energy electrons inside the BBFs is not obvious in the presence of their large background fluxes. These observations indicate that the resonant electrons in an anisotropic pitch angle distribution mainly undergo the rapid pitch angle scattering loss during the wave-particle resonances.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4975
Collection空间科学部
Corresponding AuthorLi, LY (reprint author), Beihang Univ, Sch Astronaut, XueYuan Rd 37, Beijing 100191, Peoples R China.
Recommended Citation
GB/T 7714
Li, L. Y.,Yu, J.,Cao, J. B.,et al. Rapid loss of the plasma sheet energetic electrons associated with the growth of whistler mode waves inside the bursty bulk flows[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(11):7200-7210.
APA Li, L. Y..,Yu, J..,Cao, J. B..,Zhang, D..,Wei, X. H..,...&Li, LY .(2013).Rapid loss of the plasma sheet energetic electrons associated with the growth of whistler mode waves inside the bursty bulk flows.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(11),7200-7210.
MLA Li, L. Y.,et al."Rapid loss of the plasma sheet energetic electrons associated with the growth of whistler mode waves inside the bursty bulk flows".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.11(2013):7200-7210.
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