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Experimental study and modelling of deuterium thermal release from Be–D co-deposited layers

M.J. Baldwin, T. Schwarz-Selinger, R.P. Doerner2014年被引用 27Nuclear FusionIF 3出版社

A study of the thermal desorption of deuterium from 1 µm thick co-deposited Be–(0.1)D layers formed at 330 K by a magnetron sputtering technique is reported. A range of thermal desorption rates 0 ⩽ β ⩽ 1.0 K s−1 are explored with a view to studying the effectiveness of the proposed ITER wall and divertor bake procedure (β = 0 K s−1) to be carried out at 513 and 623 K. Fixed temperature bake durations up to 24 h are examined. The experimental thermal release data are used to validate a model input into the Tritium Migration and Analysis Program (TMAP-7). Good agreement with experiment is observed for a TMAP-7 model incorporating trap populations of activation energies for D release of 0.80 and 0.98 eV, and a dynamically computed surface D atomic to molecular recombination rate.

日本語訳

1 µm厚のコデポジットBe–(0.1)D層(マグネトロンスパッタリング法により330 Kで形成)からの重水素の熱脱離に関する研究を報告する。提案されているITER壁およびダイバータベーク手順(β = 0 K s⁻¹)を513および623 Kで実施する際の有効性を検討する目的で、一連の熱脱離速度0 ⩽ β ⩽ 1.0 K s⁻¹を調査する。最大24時間の固定温度ベーク時間を検討する。実験による熱放出データを用いて、Tritium Migration and Analysis Program(TMAP-7)に入力されるモデルを検証する。D放出の活性化エネルギー0.80および0.98 eVのトラップ集団と、動的に計算される表面D原子から分子への再結合速度を組み込んだTMAP-7モデルについて、実験と良好な一致が観察される。

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