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An empirical scaling for deuterium retention in co-deposited beryllium layers

G. De Temmerman, M.J. Baldwin, R.P. Doerner, D. Nishijima, K. Schmid2008年被引用 65Nuclear FusionIF 3出版社

Different mechanisms contribute to tritium retention in ITER, amongst which co-deposition with materials from the plasma-facing components is one of the main contributors. A systematic study of the influence of the deposition conditions (substrate temperature, deposition rate, energy of the incident particles) on the deuterium retention in co-deposited beryllium layers has been carried out in PISCES-B. The mechanism by which deuterium co-deposits with beryllium appears to be a combination of co-deposition and implantation, with a decreased retention for increased deposition rate and an increased retention for increased incident deuterium particle energy. A scaling equation is developed, providing a method to predict the retention in Be co-deposits formed in PISCES-B as a function of the layer formation conditions. Using this equation, previously published data on retention in Be co-deposits are re-examined and relatively good agreement is found with the prediction of the scaling equation.

日本語訳

異なるメカニズムがITERにおけるトリチウム保持に寄与しており、その中でもプラズマ対向機器からの材料との共堆積が主要な要因の一つである。堆積条件(基板温度、堆積速度、入射粒子のエネルギー)が重水素保持に及ぼす影響について、PISCES-Bにおいて共堆積されたベリリウム層を用いた系統的な研究が行われた。重水素がベリリウムと共堆積するメカニズムは、共堆積と注入の組み合わせであると考えられ、堆積速度の増加に伴い保持量は減少し、入射重水素粒子のエネルギー増加に伴い保持量は増加することが明らかになった。層形成条件の関数としてPISCES-Bで形成されたベリリウム共堆積層における保持量を予測するためのスケーリング式が導出された。この式を用いて、ベリリウム共堆積層における保持に関する既存の公開データを再評価したところ、スケーリング式による予測と比較的良好な一致が見られた。

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iter低精度(概要文一致)

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DeuteriumBerylliumDeuterium retention
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