2D mappings of ICRF-induced SOL density modifications on JET

Abstract : Waves in the Ion Cyclotron Range of Frequencies (ICRF, 20-80MHz) provide core ion heating in tokamaks and are used to limit impurity accumulation in high-performance JET scenarios. Before reaching the core, these radiofrequency (RF) waves, excited at the Low-Field Side of the torus, interact with the Scrape-Off-Layer (SOL), causing enhanced wall sputtering, heat loads and local density (ne) changes with a complex 3D geometry. Extending previous studies on JET, this paper aims at mapping RF-induced SOL ne patterns in 2D. This puts constraints on SOL RF modelling and provides hints for locating RF-specific W sources on the JET ITER-Like-Wall (ILW), similar to the ITER vessel.
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Laurent Colas, P Jacquet, V. Bobkov, M. Brix, L. Meneses, et al.. 2D mappings of ICRF-induced SOL density modifications on JET. 45th EPS Conference on Plasma Physics, Jul 2018, Prague, Czech Republic. ⟨cea-02103387⟩

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