Geodesic acoustic mode investigation in the spherical Globus-M tokamak using multi-diagnostic approach

The results of a multi-diagnostic approach for geodesic acoustic mode (GAM) studies in the spherical torus Globus-M are presented. The GAM oscillations of radial electric field, plasma density and magnetic field were simultaneously observed. The spatial structures of crucial plasma parameters are ex...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear fusion 2016-01, Vol.56 (1), p.16017
Main Authors: Bulanin, V.V., Gusev, V.K., Iblyaminova, A.D., Khromov, N.A., Kurskiev, G.S., Minaev, V.B., Patrov, M.I., Petrov, A.V., Petrov, Yu.V., Sakharov, N.V., Shchegolev, P.B., Tolstyakov, S.Yu, Varfolomeev, V.I., Wagner, F., Yashin, Yu
Format: Article
Language:English
Subjects:
Acoustics
doppler reflectometry
Fluid dynamics
geodesic acoustic mode
limit cycle oscillations
Magnetic fields
Modulation
multi-diagnostic approach
Oscillations
Plasma density
spherical tokamak
Tokamak devices
Turbulence
zonal flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The results of a multi-diagnostic approach for geodesic acoustic mode (GAM) studies in the spherical torus Globus-M are presented. The GAM oscillations of radial electric field, plasma density and magnetic field were simultaneously observed. The spatial structures of crucial plasma parameters are exhibited and discussed. The intermittent character of the GAM manifests itself as a modulation at two time-scales: equilibrium time scale and the characteristic time for limit-cycle oscillations. The mutual influence of GAM oscillations and turbulence is demonstrated by bicoherence analysis.
ISSN:0029-5515
1741-4326
DOI:10.1088/0029-5515/56/1/016017