The geometry of ICRF -induced wave-sol interaction

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

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

As part of ITPA-Integrated Operational Scenario (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 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.

Domaines: Physique [physics]; Physique des plasmas [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. Nuclear Fusion, In press. ⟨cea-03467405⟩