[2B01-05] Hydrogen Isotope Behavior

[2B05] Helium and hydrogen isotope retention behavior in simultaneous implanted tungsten

*Qilai ZHOU¹, Yuki UEMURA², Shodai SAKURADA², Hiroe FUJITA², Kesuke AZUMA², Miyuki YAJIMA³, Masayuki TOKITANI³, Naoaki YOSHIDA⁴, Takumi CHIKADA³, Yasuhisa OYA¹ (1. Faculty of Science,Shizuoka University, 2. Graduate School of Science, Shizuoka University, 3. National Institute for Fusion Science, 4. Research Institute for Applied Mechanics, Kyushu University)

Keywords:Helium retention, Simultaneous implantation of helium and hydrogen isotope, Interaction of helium and hydrogen isotope, Bubbles, TDS

Tungsten is the candidate for plasma facing materials (PFMs) in the fusion reactor. It will be simultaneously irradiated by hydrogen isotopes and helium (He) produced by D-T fusion reaction. In this study, simultaneous He-H implantation was performed and the retention behavior was evaluated by high temperature thermal desorption spectroscopy (HT-TDS). Experimental results showed that He retention behavior was affected by the incident hydrogen to a large extent.