Coupled modeling of dust and plasma dynamics in tokamaks with DUSTT-UEDGE code

Dust events are commonly observed in present tokamaks and are expected to substantially contribute to impurity contamination of plasmas in future fusion devices. Dust formation and mobilization in tokamaks are often associated with transient plasma phenomena, leading to intermittent ejection of large amounts of dust into the plasmas. To study the impact of the intermittent dust events on fusion plasmas, we developed coupled DUSTT-UEDGE code package simulating self-consistent dynamics of dust and plasma in tokamaks. Due to very large perturbations introduced by dust injection into plasma the self-consistent modeling presents significant challenges. We report on progress in the development of the coupled modeling capabilities and present latest results on simulations of the impact of transient ejection of large tungsten dust grains on fusion edge plasmas. In particular, improvements in the code convergence were achieved, which allowed to simulate detachment dynamics during tungsten dust ejection events in ITER-like divertor plasmas.