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Particle and energy transport due to magnetic field-line reconnection in a tokamak

Published online by Cambridge University Press:  13 March 2009

Satoru Iizuka ,
Yasujiroh Minamitani  and
Hiroshi Tanaca
Satoru Iizuka
Affiliation:
Faculty of Engineering, Yokohama National University, Yokohama 240, Japan
Yasujiroh Minamitani
Affiliation:
Faculty of Engineering, Yokohama National University, Yokohama 240, Japan
Hiroshi Tanaca
Affiliation:
Faculty of Engineering, Yokohama National University, Yokohama 240, Japan
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Abstract

Plasma behaviour during magnetic field-line reconnection which is driven by a rapid toroidal current reversal in a tokamak is investigated by calculating plasma flow speed from the magnetohydromatic equations with variables measured in the experiment. A strong plasma acceleration appears in the outside region of the X-type separatrix formed in the poloidal magnetic field lines. The induced electric field inside the plasma is evaluated directly from Ohm's law by using the fact that the toroidal current density vanishes during the current reversal. Then, plasma resistivity is estimated in the cross-section and the resulting value of energy flow is compared with that given by Poynting's theorem. It is found that the input energy is dissipated effectively through anomalous resistivity in the reconnection region.

Type
Research Article
Information
Journal of Plasma Physics , Volume 37 , Issue 3 , June 1987 , pp. 335 - 346
Copyright
Copyright © Cambridge University Press 1987

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