气候变化领域集成服务门户(CCPortal): Observations of Electron Vortex at the Dipolarization Front

CCPortal

DOI	10.1029/2020GL088448
	Observations of Electron Vortex at the Dipolarization Front
	Jiang K.; Huang S.Y.; Yuan Z.G.; Deng X.H.; Xu S.B.; Wei Y.Y.; He L.H.; Zhang J.; Zhang Z.H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	Dipolarization front (DF), embedded in fast plasma flow, is a sharp structure with the increase of Bz in a short time and plays an important role in the energy dissipation and particle accelerations in the magnetotail. However, detailed physics at the small scales is still unclear in the DF due to the limitation of the previous mission. In the present study, an electron-scale plateau in Bz is observed at the DF by Magnetospheric Multiscale (MMS) mission. By analyzing the velocity of the electrons, we find that the electron-scale plateau is surrounded by a sub-ion-scale electron vortex, which is the first observation of electron vortex at the DF as far as we know. The magnetic field generated by the electron vortex cancels parts of the increase of Bz and causes the plateau. Strong asymmetric electric field and demagnetization of electrons and ions are observed at the boundary of the electron vortex. These results shed new light on that small-scale structures can develop within the ion-scale DF and affect the evolution and kinetic effects at the DF. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electric fields; Energy dissipation; Ions; Magnetosphere; Vortex flow; Asymmetric electric field; Dipolarization; Electron vortex; Kinetic effect; Magnetospheric multiscale missions; Particle acceleration; Sharp structure; Small-scale structures; Electrons; demagnetization; electrical conductivity; electromagnetic field; electron; electron density; energy dissipation; ion exchange; magnetotail; plasma; vortex
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/170146
作者单位	School of Electronic Information, Wuhan University, Wuhan, China; Institute of Space Science and Technology, Nanchang University, Nanchang, China
推荐引用方式 GB/T 7714	Jiang K.,Huang S.Y.,Yuan Z.G.,et al. Observations of Electron Vortex at the Dipolarization Front[J],2020,47(13).
APA	Jiang K..,Huang S.Y..,Yuan Z.G..,Deng X.H..,Xu S.B..,...&Zhang Z.H..(2020).Observations of Electron Vortex at the Dipolarization Front.Geophysical Research Letters,47(13).
MLA	Jiang K.,et al."Observations of Electron Vortex at the Dipolarization Front".Geophysical Research Letters 47.13(2020).