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Phys Rev Lett. 2012 Oct 19;109(16):165001. Epub 2012 Oct 17.

Multiscale investigations of drift-wave turbulence and plasma flows: measurements and total-distribution-function gyrokinetic simulations.

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1
Euratom-Tekes Association, Aalto University, P.O. Box 4100, FI-02015 Aalto, Finland.

Abstract

Direct measurements of micro-, meso-, and macroscale transport phenomena in the FT-2 tokamak are shown to be quantitatively reproduced by global full f nonlinear gyrokinetic simulation predictions. A detailed agreement with mean equilibrium E×B flows, oscillating fine-scale zonal flows, and turbulence spectra observed by a set of sophisticated microwave backscattering techniques as well as a good fit of the thermal diffusivity data are demonstrated. A clear influence of the impurity ions on the fluctuating radial electric field is observed.

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