Abstract
Different studies reveal the behaviour of Ta alloying to decrease deuterium retention in tungsten bulk materials aiming to be used for nuclear fusion applications. In this work, W and W-5 %Ta coatings were produced via magnetron sputtering techniques. The elemental composition of the samples and the spread of Ta in the W lattice was confirmed by GDOES, PIXE and by μ-PIXE, respectively. Sets of W and W-Ta coatings were simultaneously irradiated with a single 2H2+ or with sequential 4He+/2H2+ ion beam implantations using incident energies of 30 keV and ion fluences of 5 × 1017 ion/cm2. The irradiated samples were analysed by NRA/RBS and by ToF-ERDA to quantify the retained deuterium and helium amounts. The results reveal significantly lower contents of both isotopes in W-Ta.
Original language | English |
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Pages (from-to) | 41-46 |
Journal | Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms |
Volume | 538 |
DOIs | |
Publication status | Published - May 2023 |
MoE publication type | A1 Journal article-refereed |
Funding
This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 - EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. Work performed under EUROfusion WP PFC. The research leading to this result has been partially supported by Fundação para a Ciência e a Tecnologia, Portugal, through projects UID/50010/2020 and PTDC/FIS-PLA/31629/2017, by the OP VVV project CZ.02.2.69/0.0/0.0/18_053/0017163 of the Czech Academy of Sciences and by the RADIATE project under the Grant Agreement 824096 from the EU Research and Innovation programme HORIZON 2020.
Keywords
- Deuterium
- Helium
- Retention
- W-Ta coatings