Calculating RF current condensation with consistent ray-tracing and island heating

R. Nies, A. H. Reiman, E. Rodriguez, N. Bertelli, N. J. Fisch

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


By exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilization of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics treatment of wave propagation and damping to a thermal diffusion equation solver in the island. Taking into account the island geometry and relativistic damping, previous analytical theory can be made more precise and specific scenarios can be realistically predicted. With this more precise description, bifurcations and associated hysteresis effects could be obtained in an ITER-like scenario at realistic parameter values. Moreover, it is shown that dynamically varying the RF wave launching angles can lead to hysteresis and help to avoid the nonlinear shadowing effect.

Original languageEnglish (US)
Article number092503
JournalPhysics of Plasmas
Issue number9
StatePublished - Sep 1 2020

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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