Particle Simulations of Collisionless Reconnection
                     in the Relativistic Current Sheets

Ken-Ichi Nishikawa

    We have performed 2-dimensional and 3-dimensional particle
simulations of reconnections with a Harris sheet configuration. We had
found that 2-D simulation had developed as had been discussed previously
by (Pritchett, et al 2001). The magnetic field intensity levels had been
partially restored in the diffusion region after reconnection had
occurred, but the electron current density levels in the diffusion
region had decreased consistently after reconnection. This simulation is
extended to include relativistic current sheets. The evolution of
relativistic drift kink instability (RDKI) and relativistic tearing
instability (RTI) (reconnection) is studied with several simulations.
Particle acceleration associated with instabilities will be
investigated.