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Hall MHD simulations of collisionless multiple X line reconnection
Liu, C. X.; Jin, S. P.; Wei, F. S.; Liu, CX (reprint author), Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2011
Volume116Pages:A03217
ISSN2169-9380
Language英语
AbstractA Hall MHD simulation of multiple X line reconnection, in which a diffusion region around the standing X line and the moving plasmoids are involved, is presented. The observed features of Hall magnetic and electric fields in the diffusion region and the direction reversal of the electron flow in the vicinity of the magnetic separatrices are displayed in case 1 with the guide field B-y0 = 0. During the passage of a tailward moving plasmoid the bipolar B-y waveform signatures caused by the Hall current and the Hall electric field signatures in case 1 are qualitatively in line with the observations from the Geotail and Cluster spacecraft. Case 2 with B-y0 = 0.15 is carried out to investigate the reconnection configuration on the earthward side of the X line. The peaking signature of the positive B-y correlated with the bipolar (-/+) B-z is observed while an earthward moving plasmoid passes though the given point below the current sheet and close to the midplane; but the negative B-y is recorded at the given point above the current sheet. Such positive and negative B-y signatures, which are comparable with the observations from Cluster 3 and other Cluster spacecraft, are attributed to the B-y asymmetric structures associated with the Hall effect. The enhancement and variation of the electric field detected by Cluster 3 might be related to the -V' x B electric field associated with the earthward movement of the X line.; A Hall MHD simulation of multiple X line reconnection, in which a diffusion region around the standing X line and the moving plasmoids are involved, is presented. The observed features of Hall magnetic and electric fields in the diffusion region and the direction reversal of the electron flow in the vicinity of the magnetic separatrices are displayed in case 1 with the guide field B-y0 = 0. During the passage of a tailward moving plasmoid the bipolar B-y waveform signatures caused by the Hall current and the Hall electric field signatures in case 1 are qualitatively in line with the observations from the Geotail and Cluster spacecraft. Case 2 with B-y0 = 0.15 is carried out to investigate the reconnection configuration on the earthward side of the X line. The peaking signature of the positive B-y correlated with the bipolar (-/+) B-z is observed while an earthward moving plasmoid passes though the given point below the current sheet and close to the midplane; but the negative B-y is recorded at the given point above the current sheet. Such positive and negative B-y signatures, which are comparable with the observations from Cluster 3 and other Cluster spacecraft, are attributed to the B-y asymmetric structures associated with the Hall effect. The enhancement and variation of the electric field detected by Cluster 3 might be related to the -V' x B electric field associated with the earthward movement of the X line.
Indexed BySCI
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/122/3214
Collection空间科学部
Corresponding AuthorLiu, CX (reprint author), Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China.
Recommended Citation
GB/T 7714
Liu, C. X.,Jin, S. P.,Wei, F. S.,et al. Hall MHD simulations of collisionless multiple X line reconnection[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116:A03217.
APA Liu, C. X.,Jin, S. P.,Wei, F. S.,&Liu, CX .(2011).Hall MHD simulations of collisionless multiple X line reconnection.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116,A03217.
MLA Liu, C. X.,et al."Hall MHD simulations of collisionless multiple X line reconnection".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011):A03217.
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