[en] Plasma heating by energetic, charged fusion-products is a crucial issue for obtaining fusion reactors conditions. The evolution of alpha particle density, momentum, kinetic energy and heat flux is important in the study of start-up and ignition scenarios as well as in steady-state operation. Since fast ions have large banana-width guiding-center orbits in tokamaks, the usual locally-defined particle distribution function loses its usefulness. Accordingly, the fast ion collisional slowing-down problem has been formulated to describe these orbits in an axisymmetric, non-circular tokamak