Helium retention behavior in simultaneously He+-H2+ irradiated tungsten

Qilai Zhou; Keisuke Azuma; Akihiro Togari; Miyuki Yajima; Masayuki Tokitani; Suguru Masuzaki; Naoaki Yoshida; Masanori Hara; Yuji Hatano; Yasuhisa Oya

doi:10.1016/j.jnucmat.2018.02.035

Helium retention behavior in simultaneously He⁺-H₂⁺ irradiated tungsten

Qilai Zhou^*, Keisuke Azuma, Akihiro Togari, Miyuki Yajima, Masayuki Tokitani, Suguru Masuzaki, Naoaki Yoshida, Masanori Hara, Yuji Hatano, Yasuhisa Oya

^*Corresponding author for this work

Hydrogen Isotope Research Center, Organization for Promotion of Research

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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 1.0 keV and 3.0 keV. He⁺ fluences were (0.5, 1.0, 10) × 10²¹ He⁺ m⁻² and H₂⁺ fluence was 1.0 × 10²² H⁺ m⁻²,respectively. After irradiation, He desorption behavior was investigated by high temperature thermal desorption spectroscopy (HT-TDS) in the temperature range of R.T.-1773 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. 1.0 keV H₂⁺ suppressed the He bubble growth and no bubbles can be observed at room temperature. On the other hand, 3.0 keV H₂⁺ facilitated the formation of He bubbles and increased the He retention due to the additional damage introduction by energetic H₂⁺.

Original language	English
Pages (from-to)	289-294
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	502
DOIs	https://doi.org/10.1016/j.jnucmat.2018.02.035
State	Published - 2018/04/15

Keywords

He retention
Hydrogen isotope
Simultaneous irradiation
TDS
Tungsten

ASJC Scopus subject areas

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Access to Document

10.1016/j.jnucmat.2018.02.035

Cite this

@article{46c831f29dd446a1a2e34cedf3cc6be3,

title = "Helium retention behavior in simultaneously He+-H2+ irradiated tungsten",

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 1.0 keV and 3.0 keV. He+ fluences were (0.5, 1.0, 10) × 1021 He+ m−2 and H2+ fluence was 1.0 × 1022 H+ m−2,respectively. After irradiation, He desorption behavior was investigated by high temperature thermal desorption spectroscopy (HT-TDS) in the temperature range of R.T.-1773 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. 1.0 keV H2+ suppressed the He bubble growth and no bubbles can be observed at room temperature. On the other hand, 3.0 keV H2+ facilitated the formation of He bubbles and increased the He retention due to the additional damage introduction by energetic H2+.",

keywords = "He retention, Hydrogen isotope, Simultaneous irradiation, TDS, Tungsten",

author = "Qilai Zhou and Keisuke Azuma and Akihiro Togari and Miyuki Yajima and Masayuki Tokitani and Suguru Masuzaki and Naoaki Yoshida and Masanori Hara and Yuji Hatano and Yasuhisa Oya",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = apr,

day = "15",

doi = "10.1016/j.jnucmat.2018.02.035",

language = "英語",

volume = "502",

pages = "289--294",

journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Helium retention behavior in simultaneously He+-H2+ irradiated tungsten

AU - Zhou, Qilai

AU - Azuma, Keisuke

AU - Togari, Akihiro

AU - Yajima, Miyuki

AU - Tokitani, Masayuki

AU - Masuzaki, Suguru

AU - Yoshida, Naoaki

AU - Hara, Masanori

AU - Hatano, Yuji

AU - Oya, Yasuhisa

PY - 2018/4/15

Y1 - 2018/4/15

N2 - 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 1.0 keV and 3.0 keV. He+ fluences were (0.5, 1.0, 10) × 1021 He+ m−2 and H2+ fluence was 1.0 × 1022 H+ m−2,respectively. After irradiation, He desorption behavior was investigated by high temperature thermal desorption spectroscopy (HT-TDS) in the temperature range of R.T.-1773 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. 1.0 keV H2+ suppressed the He bubble growth and no bubbles can be observed at room temperature. On the other hand, 3.0 keV H2+ facilitated the formation of He bubbles and increased the He retention due to the additional damage introduction by energetic H2+.

AB - 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 1.0 keV and 3.0 keV. He+ fluences were (0.5, 1.0, 10) × 1021 He+ m−2 and H2+ fluence was 1.0 × 1022 H+ m−2,respectively. After irradiation, He desorption behavior was investigated by high temperature thermal desorption spectroscopy (HT-TDS) in the temperature range of R.T.-1773 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. 1.0 keV H2+ suppressed the He bubble growth and no bubbles can be observed at room temperature. On the other hand, 3.0 keV H2+ facilitated the formation of He bubbles and increased the He retention due to the additional damage introduction by energetic H2+.

KW - He retention

KW - Hydrogen isotope

KW - Simultaneous irradiation

KW - TDS

KW - Tungsten

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DO - 10.1016/j.jnucmat.2018.02.035

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