Investigation of particle transport in JT-60 using a perturbation method

Particle transport in JT-60 was investigated with a simple perturbation method. From an analysis of the sawtooth induced density perturbations, it was found that the particle diffusivity has an inverse dependence on the electron density and that the measured diffusion coefficients correspond to the values obtained from the analysis of pellet induced perturbations. Also, from an analysis of the density and the heat pulse propagations, the ratio of the electron thermal diffusivity and the particle diffusivity, χe/D, was estimated to be about four. These experimental results were compared with the drift wave transport models. (author). 30 refs, 9 figs