Zonal flow generation in ITG turbulence
Artikel i vetenskaplig tidskrift, 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

Tokamaks

Zonal Flows

Författare

Johan Anderson

Chalmers, Institutionen för elektromagnetik, Transportteori

Hans Nordman

Chalmers, Institutionen för radio- och rymdvetenskap

Raghvendra Singh

Jan Weiland

Chalmers, Institutionen för elektromagnetik, Transportteori

Physics of Plasmas

Vol. 9 4500-

Ämneskategorier

Fysik

Fusion, plasma och rymdfysik

Styrkeområden

Energi

Fundament

Grundläggande vetenskaper

DOI

10.1063/1.1510450