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

Laurent Colas (1) , P Jacquet (2) , V. Bobkov (3) , M. Brix (2) , L. Meneses (4) , K. Kirov (2) , E. Lerche (5, 2) , C. C. Klepper (6) , M. Goniche (1) , A. Křivská (5) , P Dumortier (2, 5) , A. Czarnecka (7) , Contributors Jet (8)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 CCFE - Culham Centre for Fusion Energy
3 IPP - Max-Planck-Institut für Plasmaphysik [Garching]
4 IPFN - Instituto de Plasmas e Fusão Nuclear [Lisboa]
5 LPP - Laboratory for Plasma Physics
6 ORNL - Oak Ridge National Laboratory [Oak Ridge]
7 IPPLM - Institute of Plasma Physics and Laser Microfusion [Warsaw]
8 Culham Science Centre [Abingdon]

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.

Domains: Plasma Physics [physics.plasm-ph]

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⟩