Numerical simulations of plasma wall interactions for ITER

At the ELMy H-mode of ITER repetitive transient processes may cause wall material vaporization and subsequent contamination of the confinement region. The magnetic configuration relaxing to the stationary confinement may significantly change the load distribution over the vessel surface. The plasma flux to the wall causes back fluxes of atoms into the confined plasma. The work is concerned with recent progress in the implementation of plasma wall interactions for the new tokamak equilibrium code TOKES that aims at the transient regime, taking ITER as most challenging target for future applications of the code. The modelling for a carbon surface and coupling of wall emitted fluxes with the confinement plasma are explained. The surface obeys the toroidal symmetry, being of arbitrary poloidal cross-section shape. Heat transport in the wall, surface evaporation, propagation of vaporized atoms in the vessel volume and ionization of wall atoms are implemented. Preliminary results are obtained.