Bizyukov I. Combined effects influencing the erosion rate of the surface exposed to the medium energy ion beams

Present manuscript discusses the sputtering of the surface under the conditions typical for near-wall plasma in fusion devices with magnetic confinement and for plasma technological applications. The processes on the tungsten surface exposed to ions of C and D are investigated at surface temperature ranging from room temperature and up to 1600 K. Particularly, the formation and modification of mixed surface exposed to the ion flux is studied in detail. It has been shown that mixed surface significantly affects the sputtering and deposition rate. The influence of the temperature effects on the mixed surface involving the deuterium re-emission, radiation-enhanced sublimation and chemical effects are discussed. The interaction of gaseous and solid-state ions with two-dimensional periodical micro-structured surface is studied. Basing on the comparison of experimental and simulation results, the influence of the roughness on the parameters of ion-surface interactions is investigated. In the frameworks of the present dissertation, the bombardment of rough tungsten surface with C ions and simultaneous bombardment with C and D ions is investigated. Particular attention is paid to erosion of tungsten exposed to intense ion beams and combined influence of steady-state and pulse loads