Spatial structure of the geodesic acoustic mode in the FT-2 tokamak by upper hybrid resonance Doppler backscattering

Author: Gurchenko A D   Gusakov E Z   Altukhov A B   Selyunin E P   Esipov L A   Kantor M Yu   Kouprienko D V   Lashkul S I   Stepanov A Yu   Wagner F  

Publisher: IOP Publishing

ISSN: 0741-3335

Source: Plasma Physics and Controlled Fusion, Vol.55, Iss.8, 2013-08, pp. : 85017-85027

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Abstract

A new experimental technique is presented for the study of zonal flows in tokamak plasmas—upper hybrid resonance Doppler backscattering. The feasibility of the diagnostics is demonstrated allowing a complete characterization of the temporal and spatial behaviour of geodesic acoustic modes. The experimental results are obtained at the FT-2 tokamak.

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