Desorption of hydrogen trapped in carbon and graphite

H. Atsumi, Y. Takemura, T. Miyabe, T. Konishi, T. Tanabe, T. Shikama

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13 Citations (Scopus)

Abstract

Thermal desorption behavior of deuterium (D2) from isotropic graphites and a carbon fiber carbon composite (CFC) charged with D2 gas has been investigated to obtain information concerning hydrogen recycling and tritium inventory in fusion experimental devices as well as a futuristic fusion reactor. After thermal desorption experiments were conducted at temperatures up to 1740 K, a desorption peak at approximately 1600 K (peak 4) was discovered. This is in addition to the previously known peak at approximately 1300 K (peak 3). Peak 3 can be attributed to the release of deuterium controlled by the diffusion process in a graphite filler grain and peak 4 can be attributed to the detrapping of deuterium released from an interstitial cluster loop edge site. Activation energies of peaks 3 and 4 are estimated to be 3.48 and 6.93 eV, respectively.

Original languageEnglish
Pages (from-to)S746-S750
JournalJournal of Nuclear Materials
Volume442
Issue number1-3 SUPPL.1
DOIs
Publication statusPublished - 2013 Apr 10

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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