The evolution of the magnetic structures in electron phase-space holes: Two-dimensional particle-in-cell simulations
文献类型：期刊论文
| 作者 | Wu, Mingyu1,2; Lu, Quanming1; Du, Aimin3; Xie, Jinlin4; Wang, Shui1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2011-10-12 |
| 卷号 | 116 |
| ISSN号 | 0148-0227 |
| DOI | 10.1029/2011JA016486 |
| 文献子类 | Article |
| 英文摘要 | Observations have shown that electron phase-space holes (electron holes) possess regular magnetic structures. In this paper, two-dimensional (2D) electromagnetic particle-in-cell (PIC) simulations are performed in the (x, y) plane to study magnetic structures associated with electron holes under different plasma conditions. In the simulations, the background magnetic field (B(0) = B(0)(e(x)) over right arrow) is along the x direction. The combined actions between the transverse instability and stabilization by the background magnetic field lead to the generation of the electric field E(y). Then electrons suffer the electric field drift and produce the current in the z direction, which leads to the fluctuating magnetic field along the x and y directions. Meanwhile, the motion of the electron holes along the x direction and the existence of the electric field E(y) generate the fluctuating magnetic field along the z direction. In very weakly magnetized plasma (Omega(e) << omega(pe), where Omega(e) and omega(pe) are the electron gyrofrequency and electron plasma frequency, respectively.), the transverse instability is very strong and the magnetic structures associated with electron holes disappear quickly. When Omega(e) is comparable to omega(pe), the parallel cut of the fluctuating magnetic field delta B(x) and delta B(z) has unipolar structures in the electron holes, while the parallel cut of fluctuating magnetic field delta B(y) has bipolar structures. In strongly magnetized plasma (Omega(e) > omega(pe)), electrostatic whistler waves with streaked structures of E(y) are excited. The fluctuating magnetic field delta B(x) and delta B(z) also have streaked structures. The relevance between our simulation results and the magnetic structures associated with electron holes observed in the plasma sheet is also discussed. |
| WOS关键词 | SOLITARY WAVES ; POLAR OBSERVATIONS ; FIELD LINES ; PLASMA ; MAGNETOTAIL ; REGION |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000295986500001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Science Foundation of China (NSFC)(40974081 ; National Science Foundation of China (NSFC)(40974081 ; 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 ; 40931053) ; 40931053) ; National Science Foundation of China (NSFC)(40974081 ; National Science Foundation of China (NSFC)(40974081 ; 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 ; 40931053) ; 40931053) ; National Science Foundation of China (NSFC)(40974081 ; National Science Foundation of China (NSFC)(40974081 ; 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 ; 40931053) ; 40931053) ; National Science Foundation of China (NSFC)(40974081 ; National Science Foundation of China (NSFC)(40974081 ; 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 ; 40931053) ; 40931053) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74052]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wu, Mingyu |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Basic Plasma Phys, Hefei 230026, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Univ Sci & Technol China, Sch Phys, Anhua 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Mingyu,Lu, Quanming,Du, Aimin,et al. The evolution of the magnetic structures in electron phase-space holes: Two-dimensional particle-in-cell simulations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116. |
| APA | Wu, Mingyu,Lu, Quanming,Du, Aimin,Xie, Jinlin,&Wang, Shui.(2011).The evolution of the magnetic structures in electron phase-space holes: Two-dimensional particle-in-cell simulations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116. |
| MLA | Wu, Mingyu,et al."The evolution of the magnetic structures in electron phase-space holes: Two-dimensional particle-in-cell simulations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011). |
入库方式： OAI收割
来源：地质与地球物理研究所
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