Effect of ion temperature gradient driven turbulence on the edge-core connection for transient edge temperature sink

Miyato, Naoaki

Ion temperature gradient (ITG) driven turbulence simulation with a transient edge temperature sink which is localized in the poloidal plane is performed using a global Landau-fluid code in the electrostatic limit. Pressure perturbations with = input by the edge sink, which are responsible for the nonlocal transport found in reduced magnetohydrodynamic (RMHD) simulation, are dissipated by the ITG turbulence in the core, where and are poloidal and toroidal mode numbers, respectively. Hence, the ITG turbulence tends to prevent the pressure perturbations connecting the core region with the edgeand thereby the nonlocal plasma response/transport of a kind observed in the RMHD simulation.