气候变化领域集成服务门户(CCPortal): Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data

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DOI	10.1029/2019GL085080
	Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data
	Eriksson E.; Vaivads A.; Alm L.; Graham D.B.; Khotyaintsev Y.V.; André M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	We study Magnetospheric MultiScale observations in the outflow region of magnetotail reconnection. We estimate the power density converted via the three fundamental electron acceleration mechanisms: Fermi, betatron, and parallel electric fields. The dominant mechanism, both on average and the peak values, is Fermi acceleration with a peak power density of about +200 pW/m3. The magnetic field curvature during the most intense Fermi acceleration is comparable to the electron gyroradius, consistent with efficient electron scattering. The peak power densities due to the betatron acceleration are a factor of 3 lower than that for the Fermi acceleration, the average betatron acceleration is close to zero and slightly negative. The contribution from parallel electric fields is significantly smaller than those from the Fermi and betatron acceleration. However, the observational uncertainties in the parallel electric field measurement prevent further conclusions. There is a strong variation in the power density on a characteristic ion time scale. ©2019. The Author.
英文关键词	Betatrons; Electric field measurement; Electric fields; Electron scattering; Electrons; Fermi level; Magnetosphere; Plasma accelerators; Uncertainty analysis; Dominant mechanism; Electron acceleration; Fermi acceleration; Magnetic reconnections; Magnetospheric multi scale; Magnetotail reconnection; Parallel electric fields; Peak power densities; Acceleration; acceleration; curvature; data assimilation; electric field; electron; magnetic field; magnetosphere; magnetotail; outflow
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170863
作者单位	Swedish Institute of Space Physics, Uppsala, Sweden; Space and Plasma Physics, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden; Space and Plasma Physics, School of Electrical Engineering and Computer Science, KTH Royal Institute of TechnologyStockholm, Sweden
推荐引用方式 GB/T 7714	Eriksson E.,Vaivads A.,Alm L.,et al. Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data[J],2020,47(1).
APA	Eriksson E.,Vaivads A.,Alm L.,Graham D.B.,Khotyaintsev Y.V.,&André M..(2020).Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data.Geophysical Research Letters,47(1).
MLA	Eriksson E.,et al."Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data".Geophysical Research Letters 47.1(2020).