CRDS modelling of deuterium release from co-deposited beryllium layers in temperature programmed and laser induced desorption experiments

被引：11
|
作者：
Matveev, D. [1 ]
Zlobinski, M. [1 ]
De Temmerman, G. [2 ]
Unterberg, B. [1 ]
Linsmeier, C. [1 ]
机构：
[1] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany
[2] ITER Org, Route Vinon Sur Verdon, F-13067 St Paul Les Durance, France
来源：
PHYSICA SCRIPTA | 2020年 / T171卷 / 01期
关键词：
hydrogen retention; beryllium co-deposits; TPD; LID; reaction-diffusion; CRDS;
D O I：
10.1088/1402-4896/ab5569
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Deuterium release from Be/D layers co-deposited using high power impulse magnetron sputtering (HiPIMS) is modelled with rate equations using the CRDS code under conditions of temperature programmed (TPD) and laser induced (LID) Desorption experiments. TPD results are simulated to fit D trapping parameters that are in turn applied to simulate the LID. TPD results are compared to equivalent results from JET-ILW and UCSD samples. HiPIMS samples show a different release behavior compared to UCSD and JET samples, release peaks at comparable heating rates are narrower and cannot be modelled using the same set of parameters. With a particular choice of diffusion-trapping parameters that reproduce the TPD peak positions, modelling of the LID efficiency results in a qualitative agreement with experimental observations. In particular, it is shown that a complete outgassing of low D content samples is not possible during laser heating unless the surface temperature exceeds the Be melting threshold.
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页数：4
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