The geometry of ICRF - Induced wave-SOL interaction

L Colas (1) , G Urbanczyk (1, 2) , M Goniche (1) , J Hillairet (1) , J.-M Bernard (1) , C Bourdelle (1) , N Fedorczak (1) , C Guillemaut (1) , W Helou (3) , V Bobkov (4) , R Ochoukov (4) , Ph Jacquet (5) , X Zhang (6) , C Qin (6) , C C Klepper (7) , C Lau (7) , S J Wukitch (8) , Y Lin (8) , M Ono (9)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 College of Physics and Optoelectronic Engineering
3 ITER - ITER organization
4 IPP - Max-Planck-Institut für Plasmaphysik [Garching]
5 CCFE - Culham Centre for Fusion Energy
6 Institute of Plasma Physics
7 ORNL - Oak Ridge National Laboratory [Oak Ridge]
8 Plasma Science and Fusion Center
9 PPPL - Princeton Plasma Physics Laboratory

As part of ITPA-IOS activities, this contribution reviews recent experimental characterization of Radio-Frequency (RF)-induced Scrape-Off Layer (SOL) modifications on various tokamaks worldwide and on the LArge Plasma Device (LAPD) at UCLA. The observed phenomenology, as observed using a large variety of measurement techniques, is consistent with the expectations from RF-sheath rectification. Emphasis is then put on the complex 3-Dimensional (3D) spatial patterns of RF-SOL interaction, in relation to the magnetic topology and the spatial distribution of RF currents over the metallic structures surrounding the RF wave-launchers. Dependence on the local plasma parameters in the antenna vicinity is also briefly addressed. The final part discusses implications for future devices.

Domains: Physics [physics]; Plasma Physics [physics.plasm-ph]

L Colas, G Urbanczyk, M Goniche, J Hillairet, J.-M Bernard, et al.. The geometry of ICRF - Induced wave-SOL interaction: A multi-machine experimental review in view of ITER operation. IAEA FEC 2021 - The 28th IAEA Fusion Energy Conference, May 2021, Nice (E-Conférence), France. ⟨cea-03245004⟩