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Low- altitude electron acceleration due to multiple flow bursts in themagnetotail

Nakamura, R; Karlsson, T; Hamrin, M; Nilsson, H; Marghitu, O; Amm, O; Bunescu, C; ... Kubyshkina, MV; + view all (2014) Low- altitude electron acceleration due to multiple flow bursts in themagnetotail. Geophysical Research Letters , 41 (3) pp. 777-784. 10.1002/2013GL058982. Green open access

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Abstract

At 10:00 UT on 25 February 2008, Cluster 1 spacecraft crossed the near-midnight auroral zone, at about 2 RE altitude, while two of the Time History of Events and Macroscale Interactions During Substorms (THEMIS) spacecraft, THD and THE, observed multiple flow bursts on the near-conjugate plasma sheet field lines. The flow shear pattern at THEMIS was consistent with the vortical motion at duskside of a localized flow channel. Coinciding in time with the flow bursts, Cluster 1 observed bursts of counterstreaming electrons with mostly low energies (≤441 eV), accompanied by short time scale (<5 s) magnetic field disturbances embedded in flow-associated field-aligned current systems. This conjugate event not only confirms the idea that the plasma sheet flows are the driver of the kinetic Alfvén waves accelerating the low-energy electrons but is a unique observation of disturbances in the high-altitude auroral region relevant to the multiple plasma sheet flows.

Type: Article
Title: Low- altitude electron acceleration due to multiple flow bursts in themagnetotail
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/2013GL058982
Publisher version: http://dx.doi.org/10.1002/2013GL058982
Language: English
Additional information: Copyright ©2014. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, (https://creativecommons.org/licenses/by-nc-nd/3.0/) which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Keywords: multiple flow burst; field-aligned current; magnetosphere-ionosphere coupling; Alfvén waves
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/1418588
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