[1O01-07] Tungsten Materials (Behavior of Hydrogen Isotope)

[1O04] Impact of helium irradiation and damage introduction on hydrogen isotope retention behaviors in tungsten

*Fei Sun¹, Akihiro Togari², Moeko Nakata², Mingzhong Zhao², Sosuke Kondo³, Tatsuya Hinoki⁴, Yasuhisa Oya² (1. Faculty of Science, Shizuoka University, 2. Graduate School of Science and Technology, Shizuoka University, 3. Institute for Materials Research, Tohoku University, 4. Institute of Advanced Energy, Kyoto University)

Keywords:Helium, hydrogen isotope, irradiation damages, simulation, tungsten, fusion

Impact of helium irradiation and damage introduction on hydrogen isotope retention behaviors was studied using simultaneous He⁺ and Fe³⁺ 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.