Zonal flow generation in ion temperature gradient mode turbulence

Details Zonal flow generation in ion temperature gradient mode turbulence Zonal flow generation in ion temperature gradient mode turbulence

2009-01-14

arxiv.org/abs/0901.1978v1

Physics of Plasmas 9, 4500 (2002)

Physics

Plasma Physics

20 pages, 5 figures

Scientific paper

10.1063/1.1510450

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.

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