Abstract
The current sheet ejection phenomenon, which causes enhancement of the magnetic reconnection rate, was investigated in the TS-3 merging experiment at the 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 G). The magnetic reconnection rate γ increased sharply from 0.14/µs to 0.33/µs right after the ejection out of the X-point region, while the reconnection rate is low in an initial pileup phase. The current sheet was separated and ejected from the diffusion region by the Lorentz force, jt×Bz. We made a new simple current sheet model on the basis of the mass conservation law, and the theoretical curve of the inflow velocity increment u accorded with the experimental one generally. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 152(3): 1–7, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20067
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