[2B01-05] Hydrogen Isotope Behavior

[2B04] Hydrogen isotope retention enhancement for tungsten exposed to QUEST plasma

*YASUHISA OYA¹, YURINA Sato², SHODAI SAKURADA³, YUKI UEMURA³, HIROE FUJITA³, KEISUKE AZUMA³, QUILA ZHOU², NAOAKI YOSHIDA⁴, KAZUAKI HANADA⁴, TAKUMI CHIKADA¹ (1. College of Science, Academic Institute, Shizuoka University, 2. Faculty of science, Shizuoka University, 3. Graduate School of Science and Technology, Shizuoka University, 4. Research Institute for Applied Mechanics, Kyushu University)

Keywords:Tungsten, Hydrogen isotope, QUEST

Elucidation of hydrogen isotope retention behavior is one of critical issues for fuel recycling. In this study, hydrogen isotope retention enhancement for W samples exposed to QUEST plasma during 2015 Fall-Winter campaign and 2016 spring-summer campaign was evaluated and compared. It was found that deposition was major interaction process for 2016 spring-summer campaign, although erosion was dominant for 2015 Fall-Winter campaign. Therefore the hydrogen isotope TDS spectra was quite different among these samples.