Symmetry-breaking induced transport in the vicinity of a magnetic island.
It is shown that in the vicinity of a magnetic island, the symmetry of the equilibrium magnetic-field strength B is broken due to the finite width of the islands. The magnitude of this broken symmetry is of the order of (deltaB/B)(1/2), where deltaB is the perturbed magnetic-field strength. This leads to enhanced plasma transport. The symmetry-breaking induced-transport flux in tokamaks with islands is calculated.
Shaing
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Engineering Physics Department, University of Wisconsin, Madison, Wisconsin 53706, USA.