Deuterium retention in mixed Be-W-D codeposited layers

The use of beryllium and tungsten components in ITER will result in the formation of mixed material codeposited layers. Codeposited layers are expected to govern the tritium inventory in ITER. Although deuterium codeposition with beryllium and tungsten has been extensively studied, little is known about deuterium codeposition with Be-W mixed materials. The results of a systematic study of deuterium retention in Be-W codeposited layers will be presented in this talk. These results were obtained during my one-year stay at the PISCES laboratory (San Diego, USA) within the framework of the US-EU Bilateral Collaboration on ITER Materials.