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Effect of layer thickness on the thermal release from Be–D co-deposited layers

M.J. Baldwin, R.P. Doerner2014年被引用 14Nuclear FusionIF 3出版社

The results of previous work (Baldwin et al 2013 J. Nucl. Mater.438 S967–70 and Baldwin et al 2014 Nucl. Fusion54 073005) are extended to explore the influence of layer thickness on the thermal D2 release from co-deposited Be–(0.05)D layers produced at ∼323 K. Bake desorption of layers of thickness 0.2–0.7 µm are explored with a view to examine the influence of layer thickness on the efficacy of the proposed ITER bake procedure, to be carried out at the fixed temperatures of 513 K on the first wall and 623 K in the divertor. The results of experiment and modelling with the TMAP-7 hydrogen transport code, show that thicker Be–D co-deposited layers are relatively more difficult to desorb (time-wise) than thinner layers with the same concentrations of intrinsic traps and retained hydrogen isotope fraction.

日本語訳

先行研究(Baldwin et al 2013 J. Nucl. Mater.438 S967–70 および Baldwin et al 2014 Nucl. Fusion54 073005)の結果を拡張し、約323 Kで作製された共堆積Be–(0.05)D層からの熱的D2放出に対する層厚の影響を調査する。厚さ0.2–0.7 µmの層のベーク脱離を、第一壁では513 K、ダイバータでは623 Kの固定温度で実施される予定の提案されたITERベーク手順の有効性に対する層厚の影響を検討する目的で調査する。TMAP-7水素輸送コードを用いた実験とモデリングの結果は、同じ濃度の固有トラップと保持された水素同位体分率を有するより薄い層よりも、より厚いBe–D共堆積層は(時間的に)脱離が比較的困難であることを示している。

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