Model development and analysis of temperature-dependent lithium sputtering and sputtered Li+ transport for tokamak plasma-facing applications

J. P. Allain, J. N. Brooks, D. A. Alman, L. E. Gonzalez

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8 Scopus citations


We developed and applied models for overall (atom + ion) sputtering and sputtered Li+ transport of liquid lithium tokamak divertor surfaces. The model/analysis has four parts: (1) a temperature-dependent data-calibrated empirical/code (TRIM) model of lithium sputtering by D+ and Li + as a function of incident particle energy and angle; (2) temperature and energy-dependent molecular dynamics (MolDyn) modeling using an effective interionic pair potential of surface-reflected redeposited Li +; (3) analytical model of reflected lithium charge state; and (4) analytic model of Li+ near-surface emission/redeposition cascade. We predict: (1) strong temperature dependence of sputter yields, (2) reflection coefficients of order 50% (thermal energies) and 10% (hyperthermal energies), (3) reflected lithium charge fractions of 10-30% near 1 eV incidence, and (4) enhanced but non-runaway Li emission for the studied surface temperature range between 473 and 653 K.

Original languageEnglish (US)
Pages (from-to)94-98
Number of pages5
JournalJournal of Nuclear Materials
Issue number1-3 SPEC. ISS.
StatePublished - Mar 1 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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