The geometry of ICRF - Induced wave-SOL Interaction

Abstract

International audienceAs part of ITPA-IOS activities, this contribution reviews recent experimental characterization of ICRF-induced 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 put on the complex 3D spatial structure of RF-SOL interaction, in relation to the magnetic topology and the spatial distribution of RF currents over the metallic structures. Dependence on the local plasmaparameters in the antenna vicinity is also briefly addressed. The final part discusses implications for future devices