The effect of helium (He) on deuterium (D) retention and transport in the bulk of tungsten (W) was investigated. For this purpose samples were irradiated by 500 keV He ions at 300 K to different fluences in order to obtain He maximum concentrations of 1 at.%, 3.4 at.%, and 6.8 at.% in 0.84 µ m depth. In order to discern the effect of irradiation damage caused by He implantation from the effect of the pure He presence on D retention, the W samples were irradiated at 300 K by 20 MeV W ions in advance to create displacement damage in the crystal lattice to a damage dose of 0.23 dpa. The samples were exposed to a D atom beam at 600 K with a flux of 3.5 × 10 18 D m −2 s −1 to populate all the created defects. The D depth profiles were measured in situ during and at the end of exposure by nuclear reaction analysis to follow the dynamics of the D uptake. Thermal desorption spectra were collected ex situ at the end of the exposure. We sho...

中文翻译：

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氘在大部分含氦钨中的迁移和保留：氦浓度和微观结构的影响

研究了氦（He）对重金属（W）中氘（D）保留和转运的影响。为此目的，以300 ke的500 keV He离子对样品进行不同的注量辐照，以获得在0.84 µm深度下He的最大浓度为1 at。％，3.4 at。％和6.8 at。％。为了从纯He的存在对D保留的影响中辨别出He注入引起的辐照损伤的影响，预先用20 MeV W离子在300 K下辐照W样品，以在晶格中产生位移损伤。损伤剂量为0.23 dpa。将样品暴露在600 K的D原子束下，通量为3.5×10 18 D m -2 s -1，以填充所有产生的缺陷。通过核反应分析在D暴露期间和暴露结束时就地测量D深度分布，以跟踪D吸收的动态。在暴露结束时就地收集热解吸光谱。我们应该...