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Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection
Wei, X. H.1; Cao, J. B.2; Zhou, G. C.1; Fu, H. S.2; Santolik, O.3,4; Reme, H.5,6; Dandouras, I.5,6; Cornilleau, N.7; Fazakerley, A.8; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationADVANCES IN SPACE RESEARCH
2013-07-01
Volume52Issue:1Pages:205-210
ISSN0273-1177
Language英语
KeywordWhistler-mode Waves Electron Temperature Anisotropy Reconnection The Plasma Sheet
AbstractThe whistler-mode waves and electron temperature anisotropy play a key role prior to and during magnetic reconnection. On August 21, 2002, the Cluster spacecrafts encountered a quasi-collisionless magnetic reconnection event when they crossed the plasma sheet. Prior to the southward turning of magnetospheric magnetic field and high speed ion flow, the whistler-mode waves and positive electron temperature anisotropy are simultaneously observed. Theoretic analysis shows that the electrons with positive temperature anisotropy can excite the whistler-mode waves via cyclotron resonances. Using the data of particles and magnetic field, we estimated the whistler-mode wave growth rate and the ratio of whistler-mode growth rate to wave frequency. They are 0.0016fce (Electron cyclotron frequency) and 0.0086fce, respectively. Therefore the whistler-mode waves can grow quickly in the current sheet. The combined observations of energetic electron beams and waves show that after the southward turning of magnetic field, energetic electrons in the reconnection process are accelerated by the whistler-mode waves.; The whistler-mode waves and electron temperature anisotropy play a key role prior to and during magnetic reconnection. On August 21, 2002, the Cluster spacecrafts encountered a quasi-collisionless magnetic reconnection event when they crossed the plasma sheet. Prior to the southward turning of magnetospheric magnetic field and high speed ion flow, the whistler-mode waves and positive electron temperature anisotropy are simultaneously observed. Theoretic analysis shows that the electrons with positive temperature anisotropy can excite the whistler-mode waves via cyclotron resonances. Using the data of particles and magnetic field, we estimated the whistler-mode wave growth rate and the ratio of whistler-mode growth rate to wave frequency. They are 0.0016f(ce) (Electron cyclotron frequency) and 0.0086f(ce), respectively. Therefore the whistler-mode waves can grow quickly in the current sheet. The combined observations of energetic electron beams and waves show that after the southward turning of magnetic field, energetic electrons in the reconnection process are accelerated by the whistler-mode waves. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
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/122/1547
Collection空间科学部
Corresponding Author北京8701信箱
Affiliation1.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing, Peoples R China
2.Beihang Univ, Beijing 100190, Peoples R China
3.Charles Univ Prague, Inst Atmospher Phys, Acad Sci Czech Republ, Prague, Czech Republic
4.Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
5.Univ Toulouse, IRAP, UPS OMP, Toulouse, France
6.CNRS, IRAP, F-31028 Toulouse 4, France
7.CETP UVSQ, Velizy Villacoublay, France
8.UCL, London, England
Recommended Citation
GB/T 7714
Wei, X. H.,Cao, J. B.,Zhou, G. C.,et al. Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection[J]. ADVANCES IN SPACE RESEARCH,2013,52(1):205-210.
APA Wei, X. H..,Cao, J. B..,Zhou, G. C..,Fu, H. S..,Santolik, O..,...&北京8701信箱.(2013).Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection.ADVANCES IN SPACE RESEARCH,52(1),205-210.
MLA Wei, X. H.,et al."Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection".ADVANCES IN SPACE RESEARCH 52.1(2013):205-210.
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