Numerical simulation of the impurity peak positions in T.F.R. 400 discharges

A numerical code which solves evolution equations for the densities of each ionization level of oxygen and molybdenum is used for simulating the stationary state of T.F.R. discharges. Using neo-classical (Pfirsch-Schluter) fluxes and anomalous 'spreading' fluxes, the positions of oxygen peaks are obtained inwardly displaced from those calculated using the coronal equilibrium model and in reasonable agreement with the experimental measurements. Reasonable agreement with the experiment for the emitted photons is found. In addition the positions of the maxima of the molybdenum peaks are in agreement with both the coronal equilibrium model and the experimental observations. (author)