Nonlocal Thermal Transport to Edge Perturbation in Tokamak Plasma

Simulation study on nonlocal plasma response in tokamak is performed using global code based on the 5-field reduced MHD model. A nonlocal plasma response to edge perturbation is found. The simulation result shows that (i) the mean central electron temperature increases according to the edge cooling (it is shown for the first time), (ii) the magnetic island located at q = 2 rational surface plays an important role (acting as internal transport barrier) as well as non-resonant modes such as (0, 0) and (1, 0) (here (m, n) implies Fourier mode with poloidal mode number m and toroidal mode number n), (iii) re-distribution of electron temperature occurs after turning off source and sink where meso-scale mode plays a major role.26th IAEA Fusion Energy Conferenc