Particle acceleration in a reconnecting current sheet: PIC simulation

摘要: The acceleration of protons and electrons in a reconnecting current sheet (RCS) is simulated with particle-in-cell (PIC) 2D3V code for the proton-to-electron mass ratio 100. electro-magnetic configuration forming RCS incorporates all three components magnetic field (including guiding field) drifted electric field. PIC simulations reveal that there polarisation appears during owing to separation from towards midplane RCS. If plasma density low, weak particle trajectories are similar those test (TP) approach. For higher stronger it affects by increasing their orbits acceleration. This also leads less asymmetrical abundances ejected comparison TP given topology same semispace as protons, contrary results. happens because extends far beyond thickness sheet. decelerates electrons, which initially into opposite returns them back RCS, and, eventually, electron ejection protons. Energy distribution rather wide single-peak, two-peak narrow-energy obtained In case strong field, mean energy found be smaller than predicted analytically simulations.