Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7963333 | Journal of Nuclear Materials | 2018 | 6 Pages |
Abstract
The purpose of this study is to elucidate helium (He) retention behavior in tungsten (W) under simultaneous He and hydrogen (H) irradiation. Polycrystalline-W was irradiated by He+ and H2+ simultaneously with the energy of 1.0â¯keV and 3.0â¯keV. He+ fluences were (0.5, 1.0, 10)â¯Ãâ¯1021 He+ mâ2 and H2+ fluence was 1.0â¯Ãâ¯1022â¯H+ mâ2,respectively. After irradiation, He desorption behavior was investigated by high temperature thermal desorption spectroscopy (HT-TDS) in the temperature range of R.T.-1773â¯K. Micro-structure changes of W after irradiation were observed by TEM. It was found that simultaneous irradiation with different H2+ energy significantly changed He retention behavior. 1.0â¯keV H2+ suppressed the He bubble growth and no bubbles can be observed at room temperature. On the other hand, 3.0â¯keV H2+ facilitated the formation of He bubbles and increased the He retention due to the additional damage introduction by energetic H2+.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Qilai Zhou, Keisuke Azuma, Akihiro Togari, Miyuki Yajima, Masayuki Tokitani, Suguru Masuzaki, Naoaki Yoshida, Masanori Hara, Yuji Hatano, Yasuhisa Oya,