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A Be-W interatomic potential.

C Björkas1, K O E Henriksson, M Probst

  • 1EURATOM/Tekes, Department of Physics, University of Helsinki, PO Box 43, FI-00014, Finland. carolina.bjorkas@helsinki.fi

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 16, 2011
PubMed
Summary
This summary is machine-generated.

A new interatomic potential for beryllium-tungsten interactions was developed, completing a set for fusion reactor materials. This potential aids in simulating plasma-wall interactions, including Be-W compounds and molecules.

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Area of Science:

  • Materials Science
  • Computational Physics
  • Nuclear Fusion Technology

Background:

  • Accurate interatomic potentials are crucial for simulating plasma-wall interactions in fusion reactors.
  • Understanding beryllium-tungsten interactions is vital for reactor component design and material selection.
  • Previous potentials lacked comprehensive coverage of all relevant material interactions.

Purpose of the Study:

  • To develop a robust interatomic potential for the beryllium-tungsten (Be-W) system.
  • To complete the set of potentials for all interactions between fusion reactor materials: beryllium (Be), tungsten (W), carbon (C), and hydrogen isotopes (H).
  • To enable accurate simulations of plasma-wall interactions and material behavior under fusion conditions.

Main Methods:

  • Derivation of an interatomic potential using established computational methods.
  • Validation against ab initio calculations for key interaction energies.
  • Testing the potential's ability to describe intermetallic phases and molecular structures.

Main Results:

  • A new interatomic potential for the Be-W system has been successfully derived.
  • The potential accurately describes the intermetallic Be(2)W and Be(12)W phases.
  • Qualitative agreement was achieved between the potential and ab initio calculations for Be-W surface interactions.
  • The potential reasonably describes various Be(x)W(y) molecular configurations.

Conclusions:

  • The developed Be-W interatomic potential is a significant advancement for fusion materials research.
  • This potential, combined with existing ones, provides a complete set for simulating complex plasma-wall interactions.
  • The findings will enhance the predictive capability of simulations for fusion reactor performance and material longevity.