NSSC OpenIR  > 空间科学部
Kinetic structure and wave properties associated with sharp dipolarization front observed by Cluster
Huang, S. Y.; Zhou, M.; Deng, X. H.; Yuan, Z. G.; Pang, Y.; Wei, Q.; Su, W.; Li, H. M.; Wang, Q. Q.; Huang, SY (reprint author), Wuhan Univ, Sch Elect Informat, Wuhan 430072, Peoples R China.
Department空间科学部
Source PublicationANNALES GEOPHYSICAE
2012
Volume30Issue:1Pages:97-107
ISSN0992-7689
Language英语
KeywordMagnetospheric Physics Magnetotail Energetic Particles Plasma Waves And Instabilities Precipitating
AbstractMultiple dipolarization fronts (DFs) were observed by Cluster spacecraft in the magnetotail during a substorm. These DFs were kinetic structures, embedded in the bursty plasma flow, and moved earthward (mainly) and dawnward. Intense electric field, parallel and perpendicular currents were detected in the DF layer. These front layers were energy dissipation region (load region) where the energy of electromagnetic fields were transferred to the plasma thermal and kinetic energy. This dissipation was dominated by electrons. There were enhancements of plasma waves around the DF region: wavelet results show that wave activities around the ion cyclotron frequency in the front layer were generated by Alfven ion cyclotron instability; whistler waves were also detected before, during and after the DFs, which are triggered by electron temperature anisotropy and coincident with enhancement of energetic electron fluxes. The observation of these waves could be important for the understanding of evolution of DF and electron energization during the substorm. We discuss the generation mechanism of the DFs and suggest that these DFs were generated in the process of transient reconnection, and then traveled toward the Earth.; Multiple dipolarization fronts (DFs) were observed by Cluster spacecraft in the magnetotail during a substorm. These DFs were kinetic structures, embedded in the bursty plasma flow, and moved earthward (mainly) and dawnward. Intense electric field, parallel and perpendicular currents were detected in the DF layer. These front layers were energy dissipation region (load region) where the energy of electromagnetic fields were transferred to the plasma thermal and kinetic energy. This dissipation was dominated by electrons. There were enhancements of plasma waves around the DF region: wavelet results show that wave activities around the ion cyclotron frequency in the front layer were generated by Alfven ion cyclotron instability; whistler waves were also detected before, during and after the DFs, which are triggered by electron temperature anisotropy and coincident with enhancement of energetic electron fluxes. The observation of these waves could be important for the understanding of evolution of DF and electron energization during the substorm. We discuss the generation mechanism of the DFs and suggest that these DFs were generated in the process of transient reconnection, and then traveled toward the Earth.
Indexed BySCI ; EI
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/122/3258
Collection空间科学部
Corresponding AuthorHuang, SY (reprint author), Wuhan Univ, Sch Elect Informat, Wuhan 430072, Peoples R China.
Recommended Citation
GB/T 7714
Huang, S. Y.,Zhou, M.,Deng, X. H.,et al. Kinetic structure and wave properties associated with sharp dipolarization front observed by Cluster[J]. ANNALES GEOPHYSICAE,2012,30(1):97-107.
APA Huang, S. Y..,Zhou, M..,Deng, X. H..,Yuan, Z. G..,Pang, Y..,...&Huang, SY .(2012).Kinetic structure and wave properties associated with sharp dipolarization front observed by Cluster.ANNALES GEOPHYSICAE,30(1),97-107.
MLA Huang, S. Y.,et al."Kinetic structure and wave properties associated with sharp dipolarization front observed by Cluster".ANNALES GEOPHYSICAE 30.1(2012):97-107.
Files in This Item: Download All
File Name/Size DocType Version Access License
201230197.pdf(5790KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Huang, S. Y.]'s Articles
[Zhou, M.]'s Articles
[Deng, X. H.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, S. Y.]'s Articles
[Zhou, M.]'s Articles
[Deng, X. H.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, S. Y.]'s Articles
[Zhou, M.]'s Articles
[Deng, X. H.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 201230197.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.