Comparison of multi-scale analysis models applied to zonal flow generation in ion-temperature-gradient mode turbulence

Details Comparison of multi-scale analysis models applied to zonal flow generation in ion-temperature-gradient mode turbulence Comparison of multi-scale analysis models applied to zonal flow generation in ion-temperature-gradient mode turbulence

2009-01-14

arxiv.org/abs/0901.2037v1

Physics of Plasmas 14 012308 (2007)

Physics

Plasma Physics

17 pages, 6 figures

Scientific paper

10.1063/1.2432050

During the past years the understanding of the multi-scale interaction problems have increased significantly. However, at present there exists a range of different analytical models for investigating multi-scale interactions and hardly any specific comparisons have been performed among these models. In this work, two different models for the generation of zonal flows from ion-temperature-gradient (ITG) background turbulence are discussed and compared. The methods used is the coherent mode coupling model and the wave kinetic equation model (WKE). It is shown that the two models give qualitatively the same results even though the assumption on the spectral difference is used in the (WKE) approach.

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