Abstract
SOLPS simulations of ELMs are performed for ITER to model the impact of sputtered tungsten on the plasma. Without prompt redeposition, the impact on the core is found to depend on the nature of the ELM event: if it is modelled by a diffusive process, contamination of the core is possible; if it is modelled by a convective process, contamination of the core can be avoided. With prompt redeposition, W contamination of the core seems to be unlikely as a result of the very high prompt redeposition fraction predicted by both simple and more complicated models.
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