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Hydrogen Isotope Retention and Desorption in Tungsten During Glow Discharges

Y. Yamauchi, Y. Kimura, Y. Kosaka, Y. Nobuta, T. Hino, K. Nishimura, Y. Ueda

Fusion Science and Technology / Volume 60 / Number 4 / November 2011 / Pages 1475-1478

Interaction with Materials / Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) /

Hydrogen isotope retention and desorption behaviors in tungsten during glow plasma exposures using hydrogen isotope or inert gas were investigated. The rapid pressure drop of D2 and the simultaneous pressure rises of HD and H2 were observed during deuterium discharge. The net amount of retained deuterium was several times larger than that of stainless steel. The desorption of HD or H2 was several times smaller than that of stainless steel. Compared with stainless steel, the amount of desorbed deuterium during subsequent inert gas discharge was several times smaller.

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