Statistical Characteristics of ITG-Driven Turbulence Dominated by Zonal Flows

Plasma turbulence driven by the Ion Temperature Gradient) is investigated by gyrofluid simulation in slab geometry for the analysis of statistical characteristics as well as transport and detailed structure of turbulence. It is found that even in the presence of the zonal flows, background turbulence has radial structure with different time scale. However, it is found that this structure is subject to the same correlation dimension, which means the turbulent may be governed by a single dynamics despite of different time scale.