Transverse confinement and periodic oscillations of electron beam structures traveling in the Earth's magnetic field
文献类型：期刊论文
| 作者 | Jiao LuHuai1; Ge YaSong2,3; Zhang YuanNong1; Guo YingJie1; Feng MingHang1; Fu Song1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 65期号:10页码:3691-3703 |
| ISSN号 | 0001-5733 |
| 关键词 | Earth's magnetic field Space-charge effect Charged particle beam Particle-in-cell (PIC) simulations |
| DOI | 10.6038/cjg2022Q0065 |
| 英文摘要 | Electron beam structures generated in the Earth's near-space play very important roles in influencing the space radiation environment. The dynamics of the electron beams travelling in free space are mainly dominated by space-charge effects, which lead to the longitudinal elongation and transverse spread simultaneously. Based on our developed kinetic particle-in-cell model, we investigate the spatial-temporal evolution of the electron beam structures propagating parallel to the Earth's magnetic field at L similar to 2 (L is equal to the geocentric altitude in Earth-radii of the local magnetic field line where it crosses the equator). We find that the electron beams travelling in the Earth's magnetic field appear transverse confinement with some periodic oscillations. By tracing the single particle motion, we validate that in the transverse direction the electrons are affected by both the electrostatic repulsion caused by the self-field, and the Lorentz force caused by the Earth's magnetic field. Furthermore, we confirm that the electrostatic repulsion dominates the initial stage of the electron beam motion, while the Lorentz force dominates the following periodic oscillations of the beam structure. Depending on the parametric analysis with different ambient magnetic fields, we further examine the impact of the magnetic field on the beam structure evolutions, and find that the oscillation period of the electron beam structure is roughly the same as the electron cyclotron period. Our results suggest that the Earth' s magnetic field is very important to dynamics of the beam structures, which will advance our understanding on the evolution of electron beam structures travelling in the geo-space environment. |
| WOS关键词 | RELATIVISTIC ELECTRONS ; WHISTLER WAVES ; RESONANT SCATTERING ; SPACE ; ACCELERATION ; INJECTION ; EMISSION ; LOSSES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000865472200001 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/107798]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Ge YaSong |
| 作者单位 | 1.Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan 430072, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiao LuHuai,Ge YaSong,Zhang YuanNong,et al. Transverse confinement and periodic oscillations of electron beam structures traveling in the Earth's magnetic field[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2022,65(10):3691-3703. |
| APA | Jiao LuHuai,Ge YaSong,Zhang YuanNong,Guo YingJie,Feng MingHang,&Fu Song.(2022).Transverse confinement and periodic oscillations of electron beam structures traveling in the Earth's magnetic field.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,65(10),3691-3703. |
| MLA | Jiao LuHuai,et al."Transverse confinement and periodic oscillations of electron beam structures traveling in the Earth's magnetic field".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 65.10(2022):3691-3703. |
入库方式： OAI收割
来源：地质与地球物理研究所
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