• DOI:10.1088/1741-4326/aa5146
• Corpus ID: 119103658

Turbulent transport of alpha particles in tokamak plasmas

@article{Croitoru2016TurbulentTO,
  title={Turbulent transport of alpha particles in tokamak plasmas},
  author={Andreea Croitoru and Dragos Iustin Palade and Madalina Vlad and Florin Spineanu},
  journal={Nuclear Fusion},
  year={2016},
  volume={57}
}

• A. Croitoru, D. Palade, +1 author F. Spineanu
• Published 28 March 2016
• Physics
• Nuclear Fusion

We investigate the E×B diffusion of fusion born α 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 α particles. According to our results, significant turbulent transport of the α particles can appear only at energies of the order of 100 KeV. We determine the corresponding conditions.