Experimental and computer investigation of the diagnostic mirror behavior under sputtering and duct material deposition

Experiments on stainless steel duct material, W and Mo mirror surfaces as well as modeling of the experiment using a new computer code which takes into account scanning tunnelling microscope measured surface topography are described. Simulations of the sputtering yield as a function of the primary ion energy and the angle of incidence for ion irradiated targets demonstrated the difference in behavior for ideally smooth, non-irradiated and irradiated targets.