Numerical analyses of impurity behaviors for CFETR advanced scenarios by core-edge integrated simulations

The core-SOL integrated COREDIV code is then used to evaluate theeffects of different seeding impurities (Ne, Ar, Kr) with the OMFIT modelled core plasma parameters as input.The impurity behaviors for the two modelled scenarios are similar.

Seeding by all the considered impurities caneffectively reduce the power to the divertor below the acceptable level. For Ne and Ar seeding, it is possible toachieve H-mode plasma operation with power from the core plasma to the SOL higher than L-H transition powerthreshold. However, higher Ne seeding rate would strongly reduce the fusion power due to the dilution effect.