NSSC OpenIR  > 空间科学部
Plasmoid-like structures in multiple X line Hall MHD reconnection
Liu, C. X.; Jin, S. P.; 魏奉思.; Lu, Q. M.; Yang, H. A.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJournal of Geophysical Research-Space Physics
2009
Volume114Pages:A10208
ISSN0148-0227
Language英语
KeywordFlux Rope Geotail Observations Driven Reconnection Magnetic-field Evolution Simulation Substorm
AbstractDriven by a waveform inflow, multiple X line reconnection is initiated in a long current layer, and the plasmoids are bound between two neighboring reconnection sites. We investigate the behaviors of the plasmoid-like structures in the absence and presence of an initial guide field B-y0 normalized by B-0 (B-0 is the initial intensity of B-x field at the top and bottom boundaries of the simulation domain) using a Hall magnetohydrodynamic (MHD) code. For the case with B-y0 = 0 the profiles of the out-of-plane B-y component are the bipolar signature or the bipolar wavelike signature which is caused by Hall effect and independent of the external mechanism. Such B-y features are in line with the observed signature of a closed-loop-like plasmoid in the magnetotail. The bipolar and fluctuation signatures of B-y have an asymmetric feature in the presence of a small B-y0(= 0.1), and the B-y profile becomes a positive signature as B-y0 reaches or exceeds 0.3. In the case of B-y0 = 0.5, a B-y bulge appears in the B-y signature when the enhanced B-y regions caused by Hall effect take place in the plasmoid. The B-y bulge evolves into a peaking signature, whose maximum (B-y vertical bar(max)) is quickly raised and approaches the lobe magnetic field strength. Such a significant enhancement of the B-y component in the central region of the plasmoid might be representative of the observed strong core field in the magnetic flux rope. The present results indicate the following implications: (1) Hall effect and a preexisting cross-tail component B-y are two important factors controlling the occurrence of various plasmoid-like structures in the magnetotail. (2) In the later phase the nonlinear interaction between Hall effect and the B-y flux added by the plasma inflow makes a most important contribution to the growth of the core B-y field.
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/122/1136
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Liu, C. X.,Jin, S. P.,魏奉思.,et al. Plasmoid-like structures in multiple X line Hall MHD reconnection[J]. Journal of Geophysical Research-Space Physics,2009,114:A10208.
APA Liu, C. X.,Jin, S. P.,魏奉思.,Lu, Q. M.,Yang, H. A.,&北京8701信箱.(2009).Plasmoid-like structures in multiple X line Hall MHD reconnection.Journal of Geophysical Research-Space Physics,114,A10208.
MLA Liu, C. X.,et al."Plasmoid-like structures in multiple X line Hall MHD reconnection".Journal of Geophysical Research-Space Physics 114(2009):A10208.
Files in This Item: Download All
File Name/Size DocType Version Access License
2009114A10208.pdf(1820KB) 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
[Liu, C. X.]'s Articles
[Jin, S. P.]'s Articles
[魏奉思.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, C. X.]'s Articles
[Jin, S. P.]'s Articles
[魏奉思.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, C. X.]'s Articles
[Jin, S. P.]'s Articles
[魏奉思.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2009114A10208.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

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