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Effects of the non-uniform initial environment and the guide field on the plasmoid instability
Ni L(倪蕾)1; Lin J(林隽)1,2; Murphy, NA2
Source PublicationPHYSICS OF PLASMAS
2013-06
Volume20Issue:6
DOI10.1063/1.4811144
Contribution Rank第1完成单位
Indexed BySCI ; EI
Abstract

Effects of non-uniform initial mass density and temperature on the plasmoid instability are studied via 2.5-dimensional resistive magnetohydrodynamic (MHD) simulations. Our results indicate that the development of the plasmoid instability is apparently prevented when the initial plasma density at the center of the current sheet is higher than that in the upstream region. As a result, the higher the plasma density at the center and the lower the plasma beta in the upstream region, the higher the critical Lundquist number needed for triggering secondary instabilities. When beta = 0.2, the critical Lundquist number is higher than 10(4). For the same Lundquist number, the magnetic reconnection rate is lower for the lower plasma beta case. Oppositely, when the initial mass density is uniform and the Lundquist number is low, the magnetic reconnection rate turns out to be higher for the lower plasma beta case. For the high Lundquist number case (>10(4)) with uniform initial mass density, the magnetic reconnection is not affected by the initial plasma beta and the temperature distribution. Our results indicate that the guide field has a limited impact on the plasmoid instability in resistive MHD. 

Funding ProjectNSFC[11147131] ; NSFY[11203069] ; 973 program[2013CBA01503] ; CAS[KJCX2-EW-T07] ; Yunnan Province[2011FB113] ; NSF SHINE grant[AGS-1156076]
Funding OrganizationNSFC[11147131] ; NSFY[11203069] ; 973 program[2013CBA01503] ; CAS[KJCX2-EW-T07] ; Yunnan Province[2011FB113] ; NSF SHINE grant[AGS-1156076]
Language英语
Subject Area物理学 ; 等离子体物理学 ; 天文学 ; 天体物理学 ; 等离子体天体物理学
MOST Discipline Catalogue理学 ; 理学::物理学 ; 理学::天文学
SubtypeArticle
PublisherAMER INST PHYSICS
Publication PlaceCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
ISSN1070-664X
URL查看原文
Archive Date2013-09-13
WOS IDWOS:000321273200008
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS KeywordRECONNECTING CURRENT SHEETS ; MAGNETIC RECONNECTION ; SECONDARY ISLANDS ; ACCELERATION ; FLARES
EI Accession Number20132916503927
EI KeywordsMagnetoplasma
EI Classification Number615.3Magnetohydrodynamics (MHD) Power Generation - 932.3Plasma Physics
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6231
Collection太阳物理研究组
Corresponding AuthorNi L(倪蕾)
Affiliation1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ni L,Lin J,Murphy, NA. Effects of the non-uniform initial environment and the guide field on the plasmoid instability[J]. PHYSICS OF PLASMAS,2013,20(6).
APA Ni L,Lin J,&Murphy, NA.(2013).Effects of the non-uniform initial environment and the guide field on the plasmoid instability.PHYSICS OF PLASMAS,20(6).
MLA Ni L,et al."Effects of the non-uniform initial environment and the guide field on the plasmoid instability".PHYSICS OF PLASMAS 20.6(2013).
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