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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
发表期刊PHYSICS OF PLASMAS
2013-06
卷号20期号:6
DOI10.1063/1.4811144
产权排序第1完成单位
收录类别SCI ; EI
摘要

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. 

资助项目NSFC[11147131] ; NSFY[11203069] ; 973 program[2013CBA01503] ; CAS[KJCX2-EW-T07] ; Yunnan Province[2011FB113] ; NSF SHINE grant[AGS-1156076]
项目资助者NSFC[11147131] ; NSFY[11203069] ; 973 program[2013CBA01503] ; CAS[KJCX2-EW-T07] ; Yunnan Province[2011FB113] ; NSF SHINE grant[AGS-1156076]
语种英语
学科领域物理学 ; 等离子体物理学 ; 天文学 ; 天体物理学 ; 等离子体天体物理学
学科门类理学 ; 理学::物理学 ; 理学::天文学
文章类型Article
出版者AMER INST PHYSICS
出版地CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
ISSN1070-664X
URL查看原文
归档日期2013-09-13
WOS记录号WOS:000321273200008
WOS研究方向Physics
WOS类目Physics, Fluids & Plasmas
关键词[WOS]RECONNECTING CURRENT SHEETS ; MAGNETIC RECONNECTION ; SECONDARY ISLANDS ; ACCELERATION ; FLARES
EI入藏号20132916503927
EI主题词Magnetoplasma
EI分类号615.3Magnetohydrodynamics (MHD) Power Generation - 932.3Plasma Physics
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6231
专题太阳物理研究组
通讯作者Ni L(倪蕾)
作者单位1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
推荐引用方式
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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