Modelling dust transport in DIII-D with DTOKS-Upgrade

Abstract Comprehensive upgrades to the dust transport code Dust in TOKamaks (DTOKS) that extend plasma-dust interaction model are presented and compared with recent measurements of DIII-D. Simulations incorporating variation physical properties graphite temperature size a stationary plasma background suggest substantial decrease lifetimes due principally thermal expansion. The trajectories 53 grains identified from analysis visible camera data taken across two similar shots were used measure particle velocity distributions. tracks terminated mostly at outer divertor strike point having mean observation time 2.1 ± 0.4 ms. Stochastic modelling 200 particles DIII-D tokamak performed DTOKS-U using simulations generated by OEDGE found behaviour, ablating rapidly after acquiring positive charge region close point, creating an acute source neutral carbon atoms. simulated lifetime, 11 2 ms, showed approximate agreement experimental when corrected accounting for visibility ignoring longest 1.5 0.2 Synthetic diagnostic coupling results visualisation software Calcam offers powerful new tool validation predictive calculations dynamics.