Hall MHD simulations of collisionless multiple X line reconnection
文献类型：期刊论文
| 作者 | Liu, C. X.; Jin, S. P.; Wei, F. S. |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 116页码:A03217 |
| ISSN号 | 2169-9380 |
| 通讯作者 | Liu, CX (reprint author), Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China. |
| 中文摘要 | 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. |
| 英文摘要 | 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. |
| 学科主题 | 空间物理 |
| 资助信息 | National Natural Science Foundation of China (NNSFC) [40890162, 40725013]; Specialized Fund for State Key Laboratory of Space Weather (Center for Space Science and Applied Research, Chinese Academy of Sciences) |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3214]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Liu, C. X.,Jin, S. P.,Wei, F. S.. 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..(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. |
入库方式： OAI收割
来源：国家空间科学中心
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