Abstract
Spatial distribution of electromagnetic wave fields within the local Alfven resonance (AR) region is studied under the conditions when this distribution is governed just by a helical inhomogeneity of the confining magnetic field rather than electron inertia or finite ion Larmor radius. It is shown that accounting for the helical inhomogeneity of the steady magnetic field can remove the infinite discontinuity of the wave fields that takes place in the case of straight magnetic field rather than other weak effects. Radio frequency (RF) power absorption within the local AR region is compared with the case when AR structure is governed by other weak phenomena.
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