Simulation of cascades in W-He

He will be present in fusion reactor wall materials, and its effect on radiation damage must be taken into account. The effect of helium on displacement cascades in tungsten has been studied using molecular dynamics simulations. Three different W--W potentials were compared and found to differ espec...

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Bibliographic Details
Published in:Philosophical magazine (Abingdon, England) England), 2010-07, Vol.90 (26), p.3581-3589
Main Authors: Juslin, Niklas, Jansson, Ville Bernt Christian, Nordlund, Kai
Format: Article
Language:English
Online Access:Get full text
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Summary:He will be present in fusion reactor wall materials, and its effect on radiation damage must be taken into account. The effect of helium on displacement cascades in tungsten has been studied using molecular dynamics simulations. Three different W--W potentials were compared and found to differ especially for the clustering of the vacancies formed in the cascades. While there are differences in the amounts of damage depending on the potential, the overall effect of He in interstitial positions was to increase the amount of damage, while He in substitutional positions reduce it, due to the effect He has on the recombination of tungsten interstititals.
ISSN:1478-6435
1478-6433
DOI:10.1080/14786435.2010.492248