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Report No.

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 $$(m, n)$$=$$(pm 1, 0)$$ 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 $$m$$ and $$n$$ are poloidal and toroidal mode numbers, respectively. Hence, the ITG turbulence tends to prevent the $$(pm 1, 0)$$ pressure perturbations connecting the core region with the edgeand thereby the nonlocal plasma response/transport of a kind observed in the RMHD simulation.



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