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Suprathermal electron acceleration during reconnection onset in the magnetotail
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
2011 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 29, no 10, 1917-1925 p.Article in journal (Refereed) Published
Abstract [en]

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 B(z) 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.

Place, publisher, year, edition, pages
2011. Vol. 29, no 10, 1917-1925 p.
Keyword [en]
Magnetospheric physics, Magnetotail, Space plasma physics, Magnetic reconnection
National Category
Geophysics Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-163251DOI: 10.5194/angeo-29-1917-2011ISI: 000296603000017OAI: oai:DiVA.org:uu-163251DiVA: diva2:464463
Available from: 2011-12-13 Created: 2011-12-09 Last updated: 2017-12-08Bibliographically approved

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Vaivads, AndrisKhotyaintsev, Yuri V.Andre, Mats

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