We investigate the diffusion of fusion born particles in tokamak plasmas. We determine the transport regimes for a realistic model that has the characteristics of the ion temperature gradient (ITG) or of the trapped electron mode (TEM) driven turbulence. It includes a spectrum of potential fluctuations that is modeled using the results of the numerical simulations, the drift of the potential with the effective diamagnetic velocity and the parallel motion. Our semi-analytical statistical approach is based on the decorrelation trajectory method (DTM), which is adapted to the gyrokinetic approximation. We obtain the transport coefficients as a function of the parameters of the turbulence and of the energy of the particles. According to our results, significant turbulent transport of the particles can appear only at energies of the order of 100 KeV. We determine the corresponding conditions.
Observation of enhanced ion particle transport in mixed H/D isotope plasmas on JET