Deuterium retention in single-crystal tungsten irradiated with 10–500 eV/D+

Abstract Deuterium retention in single-crystal tungsten was measured by thermal desorption spectroscopy as a function of D+ energy, fluence and specimen temperature. At 300 K, D retention increased significantly with increasing ion energy but at 500 K the energy dependence was weak. For both 300 and 500 K implantations, the retention was significantly lower for 10 eV/D+ than for 500 eV/D+ over the fluence range ∼1022–1024 D/m2. Depth profiles in D-implanted SCW show D retention at 300 K extending beyond 7 μm while at 500 K retention concentration is detectable at the surface