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| Titel |
Suprathermal electron acceleration during reconnection onset in the magnetotail |
| VerfasserIn |
A. Vaivads, A. Retinò, Yu. V. Khotyaintsev, M. André |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 10 ; Nr. 29, no. 10 (2011-10-28), S.1917-1925 |
| Datensatznummer |
250017115
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| Publikation (Nr.) |
 copernicus.org/angeo-29-1917-2011.pdf |
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| Zusammenfassung |
| We study one event of reconnection onset associated to a small substorm on 27
September 2006 by using Cluster observations at inter-spacecraft separation
of about 10 000 km. We focus on the acceleration of suprathermal electrons
during different stages of reconnection. We show that several distinct stages
of acceleration occur: (1) moderate acceleration during reconnection of
pre-existing plasma sheet flux tubes, (2) stronger acceleration during
reconnection of lobe flux tubes, (3) production of the most energetic electrons
within dipolarization fronts (magnetic pile-up regions). The strongest
acceleration is reached at the location of Bz maxima inside the magnetic
pile-up region where the reconnection jet stops. Very strong localized
dawn-dusk electric field are observed within the magnetic pile-up regions and
are associated to most of the magnetic flux transport. |
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