SIMULATION OF RADIATION EFFECTS ON REFLECTORS USING HEAVY-ION BEAMS

The results on modelling the behaviour of metal mirrors under neutron irradiation in a fusion reactor are presented. Mirror-like specimens w ere irradiated with beams of ions: Cr+ (stainless steel), Cu+ (copper) and Nef and/or He+ (beryllium). The energy of ions was in the range o f a few keV (He+) to 3 MeV (Cr+ and Cu+), The reflectivity as a functi on of irradiation dose was measured in the interval of spectrum 0.2-1. 0 mu m There was no strong degradation of the mirror reflectivity up t o doses similar to 10 dpa in a near surface layer. In contrast, all us ed methods showed definite change of surface characteristics.