Quasilinear analysis of the zonal flow back-reaction on ion-temperature-gradient mode turbulence
arXiv:0901.2049 · doi:10.1016/j.physleta.2008.08.003
Abstract
There is strong evidence in favor for zonal flow suppression of the Ion-Temperature-Gradient (ITG) mode turbulence, specifically close to the linear stability threshold. The present letter attempts to analytically calculate the effects of zonal flow suppression of the ITG turbulence through deriving a modified dispersion relation including the back-reaction of the zonal flows on the ITG turbulence based on the quasilinear theory. The results are manifested in a reduction of the linear growth rate and an increase in the effective linear ITG threshold.
15 pages, 3 figures
References in corpus (5)
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