Recent progress of hydrogen isotope behavior studies for neutron or heavy ion damaged W

Yasuhisa Oya, Yuji Hatano, Masashi Shimada, Dean Buchenauer, Robert Kolasinski, Brad Merrill, Sosuke Kondo, Tatsuya Hinoki, Vladimir Kh Alimov

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This paper reviews recent results pertaining to hydrogen isotope behavior in neutron and heavy ion damaged W. Accumulation of damage in W creates stable trapping sites for hydrogen isotopes, thereby changing the observed desorption behavior. In particular, the desorption temperature shifts higher as the defect concentration increases. In addition, the distribution of defects throughout the sample also changes the shape of TDS spectrum. Even if low energy traps were distributed in the bulk region, the D diffusion toward the surface requires additional time for trapping/detrapping during surface-to-bulk transport, contributing to a shift of desorption peaks toward higher temperatures. It can be said that both of distribution of damage (e.g. hydrogen isotope trapping sites) and their stabilities would have a large impact on desorption. In addition, transmutation effects should be also considered for an actual fusion environment. Experimental results show that production of Re by nuclear reaction of W with neutrons reduces the density of trapping sites, though no remarkable retention enhancement is observed.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalFusion Engineering and Design
Volume113
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Keywords

  • Heavy ion irradiation
  • Hydrogen isotope behavior in damaged W
  • Neutron irradiation
  • Plasma wall interactions

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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  • Cite this

    Oya, Y., Hatano, Y., Shimada, M., Buchenauer, D., Kolasinski, R., Merrill, B., Kondo, S., Hinoki, T., & Alimov, V. K. (2016). Recent progress of hydrogen isotope behavior studies for neutron or heavy ion damaged W. Fusion Engineering and Design, 113, 211-215. https://doi.org/10.1016/j.fusengdes.2016.08.004