MODELLING OF PLASMA FACING COMPONENT EROSION, IMPURITY MIGRATION, DUST TRANSPORT AND MELTING PROCESSES AT JET-ILW
An overview of the modelling approaches, validation methods and recent main results of analysis and modelling activities related to the plasma-wall interaction in JET-ILW experiments, including the recent H/D/T campaigns is presented in the paper. Code applications to JET-ILW experiments improve general erosion/migration/retention prediction capabilities as well as various physics extensions for instance a treatment of dust particles transport and the detailed description of melting and splashing of PFC induced by transient events at JET. 2D plasma edge transport codes like the SOLPS code as well as plasma-wall interaction (PWI) codes are key to realistic description of relevant physical processes in power and particle exhaust. Validation of the PWI and edge transport models across JET-ILW experiments considering various effects (isotope effects, first wall geometry, self-sputtering, thermo-forces, physical and chemically assisted physical sputtering formation of W and Be hydrides) is very important for predictive simulations of W and Be erosion and migration in ITER as well as for increasing quantitative credibility of the models. JET-ILW presents also a perfect test-bed for the investigation and modelling of melt material dynamics, its splashing and droplet ejection mechanisms.