The effects of a magnetic field topology on particle acceleration in a 3D reconnecting current sheet with the guiding field

Details The effects of a magnetic field topology on particle acceleration in a 3D reconnecting current sheet with the guiding field The effects of a magnetic field topology on particle acceleration in a 3D reconnecting current sheet with the guiding field

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsh22a..04a&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SH22A-04

Physics

7845 Particle Acceleration

Scientific paper

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

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