GAM observation in the TUMAN-3M tokamak. (5th February 2016)

• Record Type: Journal Article
• Authors: Bulanin, V V; Askinazi, L G; Belokurov, A A; Kornev, V A; Lebedev, V; Petrov, A V; Tukachinsky, A S; Vildjunas, M I; Wagner, F; Yashin, A Yu
• Is Part Of: Plasma physics and controlled fusion. Volume 58:Number 4(2016:Apr.)
• Publication Date: 2016-02-05
• Subjects: tokamak -- geodesic acoustic modes -- Doppler backscattering; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/0741-3335/58/4/045006
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: Results of an experimental study of geodesic acoustic modes (GAM) in the TUMAN-3M tokamak are reported. With Doppler backscattering (DBS) the basic properties of the GAM such as frequency, conditions for the GAM existence and the GAM radial location have been identified. The two-frequency Doppler reflectometer system was employed to reveal an interplay between low frequency sheared poloidal rotation, ambient turbulence level and the GAM intensity. Bicoherence analysis of the DBS data evidences the presence of a nonlinear interaction between the GAM and plasma turbulence.