Abstract
It is suggested that the ponderomotive force induced by radio frequency (rf) waves in the range of the Alfven frequency can create a transport barrier in a tokamak. The linear and nonlinear behaviour of the drift-like perturbation with a parallel velocity shear is studied in the presence of rf waves. It is shown if the radial profile of the rf field energy is properly chosen the linear mode is stabilised and turbulent momentum transport reduces. The rf power required for this stabilisation is found to be rather modest and hence should be easily obtained in actual experiments.
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Sen, S., Fukuyama, A. The Improvement of Confinement by the Use of RF Waves. Journal of Fusion Energy 18, 57–63 (1999). https://doi.org/10.1023/A:1018879025723
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DOI: https://doi.org/10.1023/A:1018879025723