Zonal flow generation in ITG turbulence
Journal article, 2002

In the present work the zonal flow (ZF) growth rate in toroidal ion-temperature-gradient (ITG) mode turbulence including the effects of elongation is studied analytically. The scaling of the ZF growth with plasma parameters is examined for typical tokamak parameter values. The physical model used for the toroidal ITG driven mode is based on the ion continuity and ion temperature equations whereas the ZF evolution is described by the vorticity equation. The results indicate that a large ZF growth is found close to marginal stability and for peaked density profiles and these effects may be enhanced by elongation.

Drift waves

Toroidal Geometry


Zonal Flows


Johan Anderson

Chalmers, Department of Electromagnetics, Transport Theory

Hans Nordman

Chalmers, Department of Radio and Space Science

Raghvendra Singh

Jan Weiland

Chalmers, Department of Electromagnetics, Transport Theory

Physics of Plasmas

Vol. 9 4500-

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Physical Sciences

Fusion, Plasma and Space Physics

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Basic sciences



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