Abstract
The influence of finite orbit-width effects and wave-induced spatial drift and diffusion on the resonant-ion distribution function in the presence of ion cyclotron resonance heating (ICRH) is studied. In particular it is found that for JET scenarios the toroidal wave-number spectrum affects the fast-ion energy density and the local formation of the high-energy tail. The finite orbit width and the wave-induced spatial diffusion can also produce ions following loss orbits resulting in localized high-energy ion losses to the wall. For ITER scenarios results from 2D orbit-averaged Fokker-Planck models are recovered.
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