Alpha power nonlinear channeling in fusion plasmas.
Castaldo C., Cardinali A.
The concept of alpha channeling in tokamaks, introduced by N. Fish since 1995, consists in the conversion of the power carried by the fusion alpha particles into radio frequency wave power. The latter is absorbed by the plasma ions to sustain the temperature required for nuclear fusion. This promising plasma heating method is much more efficient than the collisional electron heating by alpha particles. Here we propose a new scheme of alpha channeling which is based on the nonlinear interaction of alpha particles with ion Bernstein waves at Doppler shifted half-integer resonances.