Transport properties and predictive modelling of JET H-mode and optimized shear discharges

An empirical model for anomalous transport in tokamak, supplemented by the proper boundary conditions, has been developed and applied to four different types of JET discharges: ELM-free hot-ion H-mode, L-mode, ELMy H-mode and discharges with optimized magnetic shear. The results of the numerical modelling show that the model gives quite reasonable agreement with experiment in a wide range of plasma parameters and operational regimes. Moreover, they reveal some important generic features of plasma transport which are model independent.