RF current condensation in magnetic islands and associated hysteresis phenomena

E. Rodríguez, A. H. Reiman, N. J. Fisch

Research output: Contribution to journalArticle

4 Scopus citations

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 symmetrized 1D slab geometry is constructed. By limiting the RF wave power that can be absorbed through damping, this model also describes the predicted hysteresis phenomena. Compared to the linear model, the nonlinear effects lead to larger temperature variations, narrower deposition widths, and more robust island stabilization. Although, in certain regimes, the island center 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 center.

Original languageEnglish (US)
Article number092511
JournalPhysics of Plasmas
Volume26
Issue number9
DOIs
StatePublished - Sep 1 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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