Recoil energy dependence of primary radiation damage in tungsten from cascade overlap with voids
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2022-12-15
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en
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Journal of Nuclear Materials, Volume 572
Abstract
Models of radiation damage accumulation often assume a constant rate of additional primary damage formation during prolonged irradiation. However, molecular dynamics simulations have shown that the presence of pre-existing radiation-induced defects modifies the numbers of additional defects formed from individual cascades. In this work, we study the formation of defects in tungsten for a range of primary recoil energies, for cascades that fully overlap with pre-existing voids of different sizes. We extend a recent model describing defect production in the presence of pre-existing damage to also account for the recoil energy dependence, and parametrize the extension based on our simulation data. We also analyze the morphology of the primary damage from cascades overlapping with voids, and show that the in-cascade formation of 〈100〉 dislocation loops in such events is more dependent on the size of the pre-existing void, than on the energy of the primary recoil.Description
| openaire: EC/H2020/101052200/EU//EUROfusion Funding Information: 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. We acknowledge the Finnish Grid and Cloud Infrastructure (persistent identifier urn:nbn:fi:research-infras-2016072533) and CSC – IT Center for Science, Finland, for computational resources. Publisher Copyright: © 2022 The Author(s)
Keywords
Cascade overlap, Dislocations, Molecular dynamics, Radiation damage, Tungsten
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Citation
Fellman, A & Sand, A E 2022, ' Recoil energy dependence of primary radiation damage in tungsten from cascade overlap with voids ', Journal of Nuclear Materials, vol. 572, 154020 . https://doi.org/10.1016/j.jnucmat.2022.154020