Abstract
One of the currently most promising concepts to confine high temperature fusion plasmas is the divertor tokamak. In this work the effects of three-dimensional magnetic perturbation fields on power exhaust and divertor target heat fluxes in the tokamak ASDEX Upgrade are investigated experimentally and numerically. The results are discussed in view of the next step fusion device ITER, where the non-axisymmetry of the target heat flux might lead to harmful, strongly localized heat flux distributions. Based on the results in ASDEX Upgrade it is argued that such localized heat flux patterns are unlikely to occur in ITER.
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