Integrated modelling of multi-channel transport including Tungsten in JET

On a JET-ILW pulse, over 2s, the self-consistent time evolution of current, NBI source, radiation, particle, heat and momentum transport of electrons and multiple ions including Tungsten (W) is modelled. At each time step, the measured temperatures, densities and rotation profiles are successfully predicted and the observed W accumulation is reproduced. This is an essential step to allow plasma scenarios to be designed which are resistant to core accumulation. W transport is both turbulent and neoclassical, driven by the main ion and electron densities and temperatures. Predictive scenario modelling which can accurately describe W evolution therefore requires an accurate prediction of the bulk ion density, temperature, and rotation, as well as accurate models for W transport. The poloidal asymmetries induced by the centrifugal force significantly enhance the neoclassical transport and are now included in the first principles-based turbulent and neoclassical transport models integrated in JETTO-SANCO [1,2] (respectively the quasilinear gyrokinetic code QuaLiKiz [3] and the drift-kinetic code NEO [4]). This integrated modelling of a JET hybrid shot over 2s successfully reproduces experimental ion and electron temperatures, electron density and rotation profiles as well as the W core accumulation and its associated radiation. In these simulations, the W concentration remains fixed at pedestal top, showing that, in that case, ELMs are not playing a role in core W accumulation. W also seems to reduce heat and particle turbulent transport through complex nonlinear interplays.