Effect of ideal internal MHD instabilities on NBI fast ion redistribution in ITER 15 MA scenario

Transport of fast ions is a crucial issue during the operation of ITER. Redistribution of neutral beam injection(NBI) fast ions by the ideal internal magnetohydrodynamic(MHD) instabilities in ITER is studied utilizing the guiding-center code ORBIT(White R B and Chance M S 1984Phys. Fluids 27 2455). Effects of the perturbation amplitude A of the internal kink, the perturbation frequency f of the fishbone instability, and the toroidal mode number n of the internal kink are investigated, respective...