TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 53 (No. 6), pp. 521-526, 2001

Fast compression of a current sheet during externally driven magnetic reconnection

Y. Ono, M. Inomoto, Y. Ueda, T. Matsuyama, and Y. Murata

High Temperature Plasma Center, University of Tokyo, Tokyo 113-8656, Japan

(Received June 20, 2000; Revised January 5, 2001; Accepted February 28, 2001)

Abstract: Magnetic reconnection of two toroidal plasmas with arbitrary q values revealed a dependence of sheet-current dissipation and ion heating on ion-gyromotion. Effective sheet-current resistivity was found to increase significantly, when an external force compressed the current sheet shorter than the ion-gyroradius, and both the reconnection speed and ion temperature increased with decreasing current sheet width and with increasing ion-gyroradius.

Corresponding author E-mail: ono@katsurai.t.u-tokyo.ac.jp

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