Rotational Resonance of Non-axisymmetric Magnetic Braking in the KSTAR Tokamak
Authors: J.-K. Park, et. al.
Abstract:
One of important rotational resonances in non-axisymmetric neoclassical transport has been experimentally
validated in the KSTAR tokamak, by applying highly non-resonant n = 1 magnetic
perturbations to rapidly rotating plasmas. These so-called bounce-harmonic resonances are expected
to occur in the presence of magnetic braking perturbations when the toroidal rotation is
fast enough to resonate with periodic parallel motions of trapped particles. The predicted and observed
resonant peak along with the toroidal rotation implies that the toroidal rotation in tokamaks
can be controlled naturally in favorable conditions to stability, using non-axisymmetric magnetic
perturbations.
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Submitted to: Physical Review Letterrs (April 2013)
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