Simulation of radiation effects on reflectors using heavy ion beams

Abstract The results on modelling the behaviour of metal mirrors under neutron irradiation in a fusion reactor are presented. Mirror-like specimens were irradiated with beams of ions: Cr + (stainless steel), Cu + (copper) and Ne + and/or He + (beryllium). The energy of ions was in the range of a few keV (He + ) to 3 MeV (Cr + and Cu + ). The reflectivity as a function of irradiation dose was measured in the interval of spectrum 0.2–1.0 μm. There was no strong degradation of the mirror reflectivity up to doses ∼ 10 dpa in a near surface layer. In contrast, all used methods showed definite change of surface characteristics.