RF current condensation in magnetic islands and associated hysteresis phenomena
arXiv:1907.01612 · doi:10.1063/1.5118424
Abstract
The nonlinear RF current condensation effect suggests that magnetic islands might be well controlled with broader deposition profiles than previously thought possible. To assess this possibility, a simplified energy deposition model in a symmetrised 1D slab geometry is constructed. By limiting the RF wave power that can be absorbed through damping, this model describes also the predicted hysteresis phenomena. Compared to the linear model, the nonlinear effects lead to larger temperature variations, narrower deposition widths, and more robust island stabilisation. Although, in certain regimes, the island centre can be disadvantageously shaded because of the nonlinear effects, in general, the RF condensation effect can take place, with current preferentially generated, advantageously, close to the island centre.
References in corpus (4)
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Cited by in corpus (6)
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- On the merit of hot ion mode for tearing mode stabilization
- Coupled heat pulse propagation in two fluid plasmas