Impact of helium irradiation and damage introduction on hydrogen isotope retention behaviors in tungsten

Impact of helium irradiation and damage introduction on hydrogen isotope retention behaviors was studied using simultaneous He and Fe irradiation. The additional D2 implantation was performed, and D retention was evaluated by TDS. Based on these experimental results, the model of hydrogen isotope diffusion and trapping across helium bubble layer in tungsten was established. Good agreement can be achieved by comparing simulations based on the established model to the experimental results, indicating that D desorption behavior can be reasonably explained.