Simulation of cascades in tungsten-helium

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Abstract

Helium (He) is present in fusion reactor wall materials, and its effect on radiation damage must be taken into account. The effect of He on displacement cascades in tungsten (W) 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 interstitials.

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Original languageEnglish
Pages (from-to)3581-3589
JournalPhilosophical Magazine
Volume90
Issue number26
DOIs
Publication statusPublished - 14 Sep 2010

Keywords

  • tungsten, helium, radiation damage, displacement cascade

ID: 298123