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Magnetic island evolution in rotating plasmas

Published online by Cambridge University Press:  20 December 2006

YASUTOMO ISHII ,
M. AZUMI  and
A.I. SMOLYAKOV
YASUTOMO ISHII
Affiliation:
Department of Fusion Plasma Research, Japan Atomic Energy Research Institute, 801-1 Mukoyama, Naka City, Ibaraki 311-0193, Japan
M. AZUMI
Affiliation:
Center for Promotion of Computational Science and Engineering, Japan Atomic Energy Research Institute, 6-9-3 Higashi Ueno, Tokyo 110-0015, Japan
A.I. SMOLYAKOV
Affiliation:
Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon SK, Canada, S7N 5E2
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Abstract

The time evolution of the magnetic island formed at the tearing stable rational surface by the external magnetic flux perturbation in the plasma with poloidal flow is investigated numerically by using the resistive magnetohydrodynamic (MHD) model and the magnetic island is found to show rapid growth after the reduced growth phase due to the plasma rotation. It was also found that the onset condition of this rapid growth depends on the resistivity, but does not depend on the viscosity, in the parameter regime used in this study. On the other hand, the time constant of the rapid growth phase is almost independent of both the plasma resistivity and the viscosity. This rapid growth of magnetic island is the possible candidate for the trigger problem of the neoclassical tearing mode in a tokamak.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 1243 - 1248
Copyright
2006 Cambridge University Press

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