Bulk ion heating from nonlinear Landau damping of high-n toroidal Alfvén eigenmodes (TAEs) excited by energetic ions is studied. Based on the nonlinear saturation level of high-n TAEs which is confirmed by numerical studies of a wave-kinetic equation incorporating the ion Compton scattering-induced spectral transfer and the particle trapping by the wave, we assess potentially beneficial effect of bulk ion heating, so-called alpha channeling for ITER DT plasmas using an integrated simulation. The result indicates that, in its optimistic limit, the anomalous ion heating due to high-n TAEs can compensate the heating reduction due to energetic particle loss.
Overview of Alfven eigenmode experiments in JET