Coupled plasma–wall modeling

The new time-dependent one-dimensional code WALLPSI to calculate wall temperature, erosion rates, and concentrations of trapped, chemically bonded, absorbed, and mobile hydrogen inside the wall has been developed. To study basic physics processes, WALLPSI is coupled to the 1-D edge plasma transport code EDGE1D. The results of self-consistent plasma–neutrals–wall modeling with WALLPSI/EDGE1D which show strong plasma–wall coupling are presented. Variation of hydrogen inventory in the wall in response to the changing plasma impact is discussed. Oscillatory behavior and thermal instability of plasma in contact with hydrogen saturated wall are modeled.