ERO2.0 modelling of nanoscale surface morphology evolution

Abstract Plasma–material interaction (PMI) in tokamaks determines the life-time of first-wall (FW) components. Due to PMI, FW materials are eroded and transported within device. Erosion is strongly influenced by original morphology component, due particle redeposition on near surface structures changing impact angle distributions, which results an alteration sputtering effects. The Monte-Carlo impurity transport code ERO2.0 capable modelling erosion non-trivial morphologies plasma irradiation. module was validated against experimental data with satisfactory agreement. In this work, we further progress validation capabilities both numerically generated surfaces as well real surfaces, using atomic force microscopy (AFM) measurements reference tungsten samples. former used validate one evolution models present literature, order outline conditions for reliable solutions. Modifications induced AFM-generated after argon helium irradiation compared, showing a similar post-exposure morphology, mostly dominated smoothing. Finally, retrieved He exposure compared experimentally-available scanning electron AFM same exposed linear device GyM, need improvements code, while good agreement between simulated rate observed.