Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..327l&link_type=abstract
In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze
Physics
Flares, Reconnection, Acceleration
Scientific paper
Traditional models for particle acceleration in current sheets of solar flares assumed a constant electric field in the sheet. Although this assumption may be justified during the gradual phase of the flare, the situation is different during the impulsive phase when nonsteady plasma motions and rapid changes in the magnetic field imply rapid reconnection and a time-varying electric field in the sheet. Rapid reconnection is likely to be related to a flare-triggering instability such as tearing or the propagation of a reconnective MHD disturbance toward a magnetic null point. This paper describes exploratory analytical calculations of charged particle orbits and energy gains in an oscillating electrtic field present in the region of magnetic field merging. Applications to particle acceleration in impulsive solar flares are discussed.
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