MHD study of three-dimensional instability and plasmoid ejections of the spontaneous fast magnetic reconnection

T. Shimizu

Ehime University

Three-dimensional MHD simulation is executed to study the three-dimensional configuration of the spontaneous fast magnetic reconnection driven by the current-driven anomalous resistivity. It is shown that the two-dimensional spontaneous fast magnetic reconnection studied previously is unstable for three-dimensional perturbations, even in the slab-geometry current sheet. As a result, three-dimensional plasmoids are intermittently ejected from the reconnection site. The stochastic features of the plasmoid ejections and the three-dimensional structure of the fast magnetic reconnection observed in MHD simulation are discussed in comparison with some observation data.