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DOI | 10.1029/2019GL085141 |
Direct Evidence for Electron Acceleration Within Ion-Scale Flux Rope | |
Zhong, Z. H.1,2; Zhou, M.1,2,3; Tang, R. X.2; Deng, X. H.1,2; Turner, D. L.4; Cohen, I. J.5; Pang, Y.2; Man, H. Y.2,3; Russell, C. T.6; Giles, B.7; Paterson, W. R.7; Khotyaintsev, Y.8; Burch, J. L.9 | |
2020-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Sweden |
英文摘要 | Energetic electrons have frequently been observed in small-scale flux ropes. However, whether these energetic electrons were energized directly within the flux rope or not is unknown. In this paper, we present concrete evidence provided by the Magnetospheric Multiscale mission that a secondary flux rope provided strong acceleration for electrons expelled by the reconnection X line. We find that the energetic electron fluxes inside the ion-scale flux rope were larger than those outside the flux rope. Electrons were adiabatically accelerated by betatron and Fermi mechanisms inside the flux rope. The highest energy electrons (>100 keV) were produced by betatron acceleration, whereas Fermi acceleration was unable to accelerate the electrons to high energy probably due to the finite distance of the acceleration region along the field-aligned direction. These results confirm the essential role of ion-scale flux ropes in producing energetic electrons. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000513983400051 |
WOS关键词 | MAGNETIC RECONNECTION ; PARTICLE-ACCELERATION ; CLUSTER OBSERVATIONS ; ENERGETIC ELECTRONS ; FIELD ; ISLANDS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279518 |
专题 | 气候变化 |
作者单位 | 1.Nanchang Univ, Sch Resource Environm & Chem Engn, Nanchang, Jiangxi, Peoples R China; 2.Nanchang Univ, Inst Space Sci & Technol, Nanchang, Jiangxi, Peoples R China; 3.Nanchang Univ, Sch Sci, Dept Phys, Nanchang, Jiangxi, Peoples R China; 4.Aerosp Corp, El Segundo, CA 90245 USA; 5.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA; 6.UCLA, Dept Earth Planetary & Space Sci, Los Angeles, CA USA; 7.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 8.Swedish Inst Space Phys, Uppsala, Sweden; 9.Southwest Res Inst, San Antonio, TX USA |
推荐引用方式 GB/T 7714 | Zhong, Z. H.,Zhou, M.,Tang, R. X.,et al. Direct Evidence for Electron Acceleration Within Ion-Scale Flux Rope[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1). |
APA | Zhong, Z. H..,Zhou, M..,Tang, R. X..,Deng, X. H..,Turner, D. L..,...&Burch, J. L..(2020).Direct Evidence for Electron Acceleration Within Ion-Scale Flux Rope.GEOPHYSICAL RESEARCH LETTERS,47(1). |
MLA | Zhong, Z. H.,et al."Direct Evidence for Electron Acceleration Within Ion-Scale Flux Rope".GEOPHYSICAL RESEARCH LETTERS 47.1(2020). |
条目包含的文件 | 条目无相关文件。 |
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