Investigation of the interaction of He and D in FeBSi alloy

Abstract

He and H can be produced by nuclear reaction. In addition, energetic particles of He and T and D, which are isotopes of H, in the plasma of fusion reactor induce the damage in the surface of materials, such as erosion, sputtering and blistering. To investigate the interaction of He and D, amorphous and crystalline FeBSi alloys were irradiated by He or D[2] or He + D[2] ions with 5 keV. The results of thermal desorption indicated that more He atoms were trapped in both the amorphous and crystalline alloy irradiated by He ions than D atoms in those alloys irradiated by D[2] ions. Although He and D atoms were trapped in FeBSi alloy irradiated by He + D[2] ions, desorption peaks of D[2] and He were separated. Absorption of D in an amorphous alloy was influenced by the presence of He; however, absorption of He was independent of D[2] irradiation in both alloys.