HR: 1340h
AN: SH13A-1148    [Abstracts]
TI: The energy spectra of particles accelerated in a reconnecting current sheet with strong guiding field
AU: * Gordovskyy, M
EM: m.gordovskyy@bradford.ac.uk
AF: Cybernetics Departments, University of Bradford, Bradford, BD7 1DP United Kingdom
AU: * Gordovskyy, M
EM: m.gordovskyy@bradford.ac.uk
AF: Astronomical Observatory, Kyiv University, Kyiv, 04053 Ukraine
AU: Zharkova, V V
AF: Cybernetics Departments, University of Bradford, Bradford, BD7 1DP United Kingdom
AB: Electron and proton acceleration by a super-Dricer electric field is investigated in the non-neutral reconnecting current sheet (RCS) with a non-zero longitudinal component of magnetic field ('a guiding field', GF) parallel to the electric field. The other two magnetic field components, transverse and tangential, are considered varying with distances from the X null-point of a RCS. The proton and electron energy spectra are calculated numerically from a motion equation using the test particle approach for model RCSs with constant and variable densities. In the presence of a strong or moderate guiding field protons were found fully or partially separated from electrons at ejection from a RCS into the opposite semiplanes, 'electron' and 'proton' ones. In the case of a weak guiding field both protons and electrons are ejected symmetrically in equal proportions as neutral beams. The particles ejected from a RCS with a weak guiding field have the power low energy spectra with spectral indices about 1.7 for protons and 2.2 for electrons. In case of strong guiding field spectra become slightly harder and the spectral indices decrease to 1.5 and 1.9 for protons and electrons, respectively.
DE: 7519 Flares
DE: 7807 Charged particle motion and acceleration
DE: 7827 Kinetic and MHD theory
DE: 7843 Numerical simulation studies
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting