抄録
The current-sheet ejection phenomenon, which causes enhancement of the magnetic reconnection rate, was investigated in the TS-3 merging experiment at University of Tokyo. The current-sheet was ejected when two coaxial torus plasmas were compressed rapidly by the external force under high intensity toroidal field (about 500 [Gauss]). The magnetic reconnection rate γ increased sharply from 0.14 [1/μsec] to 0.33 [1/μsec] right after the ejection out of the X-point region, while the reconnction rate is low in an initial pile up phase. The current-sheet was separated and ejected from the diffusion region by the Lorentz force, jt× Bz. We made new simple current sheet model on the basis of mass conservation law, and the theoretical curve of the inflow velocity increment u accorded with the experimental one generally.
