An embedded electron current layer observed at the edge of the plasma sheet in the Earth’s magnetotail
作者机构：Deep Space Exploration Laboratory/School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences(CAS)Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Anhui Mengcheng National Geophysical ObservatoryUniversity of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and TechnologyHarbin 150001China
出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)
年 卷 期：2025年第9卷第1期
页 面：148-158页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：the National Natural Science Founda-tion of China(NSFC Grant No.42174181)and the Key Research Program of Frontier Sciences CAS(Grant No.QYZDJ-SSW-DQC010)
主 题：magnetotail plasma sheet magnetic reconnection
摘 要：The formation of an embedded electron current sheet within the magnetotail plasma sheet has been poorly *** this article,we present an electron current layer detected at the edge of the magnetotail plasma *** ions were demagnetized inside the electron current layer,but the electrons were still frozen in with the magnetic field ***,this decoupling of ions and electrons gave rise to a strong Hall electric field,which could be the reason for the formation of the embedded thin current *** magnetized electrons,the absence of the nongyrotropic electron distribution,and negligible energy dissipation in the layer indicate that magnetic reconnection had not been triggered within the embedded thin current *** highly asymmetric plasma on the two sides of the current layer and low magnetic shear across it could suppress magnetic *** observations indicate that the embedded electric current layer,probably generated by the Hall electric field,even down to electron scale,is not a sufficient condition for magnetic reconnection.
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