Poloidal inhomogeneity of turbulence in the FT-2 tokamak by radial correlation Doppler reflectometry and gyrokinetic modelling. (31st August 2016)

• Record Type: Journal Article
• Authors: Altukhov, A B; Gurchenko, A D; Gusakov, E Z; Esipov, L A; Irzak, M A; Kantor, M Yu; Kouprienko, D V; Lashkul, S I; Leerink, S; Niskala, P; Stepanov, A Yu; Teplova, N V
• Is Part Of: Plasma physics and controlled fusion. Volume 58:Number 10(2016:Oct.)
• Publication Date: 2016-08-31
• Subjects: turbulence -- radial correlation reflectometry -- correlation length -- plasma; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/0741-3335/58/10/105004
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: The poloidal dependence of the drift-wave turbulence characteristics is investigated at the FT-2 tokamak by radial correlation Doppler reflectometry (RCDR) technique and using the full distribution function global gyrokinetic modelling by ELMFIRE code. The poloidal variation of the turbulence radial correlation length from 0.2–0.55 cm is demonstrated both by measurement and computation. The turbulence correlation length rapidly decreases from the top of the poloidal cross-section to the high field side and then steadily grows in the poloidal direction. A well-pronounced excess of the turbulence radial correlation length in deuterium over its value in hydrogen discharges is demonstrated.