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.
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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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