[en] Experimental techniques have been developed for the irradiation of oxide, ceramic materials, by ion beams of MeV energies, up to power densities of 5 x 105 W/m2 at 800 K and above. For experimental work with the facilities at Harwell in the foreseeable future it is proposed that 4 MeV N+ or 6 MeV Ne+ ion irradiation of thin foils will give the best simulation of 14.1 neutron irradiation