The magnetic structures of electron phase-space holes formed in the electron two-stream instability

doi:10.1007/s10509-011-0913-5

	The magnetic structures of electron phase-space holes formed in the electron two-stream instability
	Wu, Mingyu 1,2; Lu, Quanming 1; Zhu, Jie 1; Du, Aimin 3; Wang, Shui 1
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2012-03-01
卷号	338 期号:1 页码:81-85
关键词	Electron phase-space hole Magnetic structure Particle-in-cell stimulation The transverse instability
ISSN号	0004-640X
DOI	10.1007/s10509-011-0913-5
文献子类	Article
英文摘要	It is well known that the parallel cuts of the parallel and perpendicular electric field in electron phase-space holes (electron holes) have bipolar and unipolar structures, respectively. Recently, electron holes in the Earth's plasma sheet have been observed by THEMIS satellites to have detectable fluctuating magnetic field with regular structures. Du et al. (2011) investigated the evolution of a one-dimensional (1D) electron hole with two-dimensional (2D) electromagnetic particle-in-cell (PIC) simulations in weakly magnetized plasma (Omega(epsilon) < omega(pe), where Omega(e) and omega(pe) are the electron gyrofrequency and electron plasma frequency, respectively), which initially exists in the simulation domain. The electron hole is unstable to the transverse instability and broken into several 2D electron holes. They successfully explained the observations by THEMIS satellites based on the generated magnetic structures associated with these 2D electron holes. In this paper, 2D electromagnetic particle-in-cell (PIC) simulations are performed in the x-y plane to investigate the nonlinear evolution of the electron two-stream instability in weakly magnetized plasma, where the background magnetic field (B-0 = B-0<(e)over right arrow>(x)) is along the x direction. Several 2D electron holes are formed during the nonlinear evolution, where the parallel cuts of E-x and E-y have bipolar and unipolar structures, respectively. Consistent with the results of Du et al. (2011), we found that the current along the z direction is generated by the electric field drift motion of the trapped electrons in the electron holes due to the existence of E-y, which produces the fluctuating magnetic field delta B-x and delta B-y in the electron holes. The parallel cuts of delta Bx and delta B-y in the electron holes have unipolar and bipolar structures, respectively.
WOS关键词	SOLITARY WAVES ; POLAR OBSERVATIONS ; FIELD LINES ; PLASMA ; MAGNETOTAIL ; EVOLUTION ; REGION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000299848400011
资助机构	National Science Foundation of China (NSFC)(41128004 ; National Science Foundation of China (NSFC)(41128004 ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Fundamental Research Funds for the Central Universities(WK2080000010) ; Fundamental Research Funds for the Central Universities(WK2080000010) ; 40725013 ; 40725013 ; 40974081) ; 40974081) ; National Science Foundation of China (NSFC)(41128004 ; National Science Foundation of China (NSFC)(41128004 ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Fundamental Research Funds for the Central Universities(WK2080000010) ; Fundamental Research Funds for the Central Universities(WK2080000010) ; 40725013 ; 40725013 ; 40974081) ; 40974081) ; National Science Foundation of China (NSFC)(41128004 ; National Science Foundation of China (NSFC)(41128004 ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Fundamental Research Funds for the Central Universities(WK2080000010) ; Fundamental Research Funds for the Central Universities(WK2080000010) ; 40725013 ; 40725013 ; 40974081) ; 40974081) ; National Science Foundation of China (NSFC)(41128004 ; National Science Foundation of China (NSFC)(41128004 ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; Fundamental Research Funds for the Central Universities(WK2080000010) ; Fundamental Research Funds for the Central Universities(WK2080000010) ; 40725013 ; 40725013 ; 40974081) ; 40974081)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84712]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu, Quanming
作者单位	1.Univ Sci & Technol China, Dept Geophys & Planetary Sci, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wu, Mingyu,Lu, Quanming,Zhu, Jie,et al. The magnetic structures of electron phase-space holes formed in the electron two-stream instability[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,338(1):81-85.
APA	Wu, Mingyu,Lu, Quanming,Zhu, Jie,Du, Aimin,&Wang, Shui.(2012).The magnetic structures of electron phase-space holes formed in the electron two-stream instability.ASTROPHYSICS AND SPACE SCIENCE,338(1),81-85.
MLA	Wu, Mingyu,et al."The magnetic structures of electron phase-space holes formed in the electron two-stream instability".ASTROPHYSICS AND SPACE SCIENCE 338.1(2012):81-85.