論文

査読有り
2020年11月

Deuterium recombination coefficient on tungsten surface determined by plasma driven permeation

Fusion Engineering and Design
  • Mingzhong Zhao
  • ,
  • Shota Yamazaki
  • ,
  • Takuro Wada
  • ,
  • Ayaka Koike
  • ,
  • Fei Sun
  • ,
  • Naoko Ashikawa
  • ,
  • Yoji Someya
  • ,
  • Tetsu Mieno
  • ,
  • Yasuhisa Oya

160
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.fusengdes.2020.111853
出版者・発行元
ELSEVIER SCIENCE SA

© 2020 Elsevier B.V. Deuterium (D) plasma driven permeation (PDP) experiments for tungsten (W) samples were conducted by a linear radio frequency (RF) plasma device. In the PDP experiment, the W sample surface is perpendicular to the grain elongation direction. The D ion flux is in the order of 1021 m−2 s−1 determined by a double Langmuir probe. The results show that bias had a limited effect on the D plasma driven permeation behavior. The D recombination coefficient on W surface is obtained at the temperature ranging from 740 K to 1031 K. The experimentally measured recombination coefficient for a pristine W surface is lower than that for a clean W surface. The effect of recombination coefficient on the D permeation and retention behaviors in W are studied by Hydrogen Isotope Diffusion and Trapping (HIDT) simulation code. The low recombination coefficient leads to a high D concentration in W and a high permeation rate at the back surface. The D permeation rate through a 8 mm thick W with a pristine surface is estimated to be 8.1 × 1018 D m s−1 under the incident ion flux of 1 × 1024 m−2 s−1 and temperature of 1173 K.

リンク情報
DOI
https://doi.org/10.1016/j.fusengdes.2020.111853
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000588143300040&DestApp=WOS_CPL
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85086851221&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85086851221&origin=inward
ID情報
  • DOI : 10.1016/j.fusengdes.2020.111853
  • ISSN : 0920-3796
  • eISSN : 1873-7196
  • SCOPUS ID : 85086851221
  • Web of Science ID : WOS:000588143300040

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