Suprathermal electron acceleration during reconnection onset in the magnetotail

Details Suprathermal electron acceleration during reconnection onset in the magnetotail Suprathermal electron acceleration during reconnection onset in the magnetotail

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm13c2099v&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM13C-2099

Physics

[2764] Magnetospheric Physics / Plasma Sheet

Scientific paper

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 boundaries. 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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