HR: 11:17h
AN: SH22A-04    [Abstracts]
TI: The effects of a magnetic field topology on particle acceleration in a 3D reconnecting current sheet with the guiding field
AU: * Agapitov, A
EM: agapit@univ.kiev.ua
AF: Physics and Astronomy Department, Taras Shevchenko National Kyiv University, 6 Glushkov Prospect, Kyiv, 03022, Ukraine
AU: Zharkova, V
EM: v.v.zharkova@brad.ac.uk
AF: Department of Computing, University of Bradford Richmond Road, Bradford, BD7 1DP, United Kingdom
AB: We investigate particle trajectories and energy spectra at acceleration by a super-Dreiser electric field occurring in 3D reconnecting current sheets with different magnetic field topologies deduced from the MHD simulations. The transversal magnetic field is considered to vary exponentially as z± with the distance z from the X-null point and to be linked to a reconnection rate. The dependence on ± for different guiding field magnitudes of proton and electron trajectories and spectra is obtained. The distributions of the accelerated particles density in an RCS and energy spectra at ejection are evaluated for different magnetic field topologies [1] and reconnection rates [2] and compared with some observational signatures. The proposed method can be used for a diagnostics of magnetic reconnection dynamics from high energy particle spectra observed with a high temporal resolution. 1. Craig I.J.D. and McClymont A.N. Dynamic magnetic reconnection at an X-type neutral point, Astronomical Journal, 371, L41, 1991 2. Arber T.D. and Haynes M. A generalized Petchek magnetic reconnection rate, Physics of Plasmas, 13, 112105, 2006
DE: 7845 Particle acceleration
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Joint Assembly