Integrated, multi-physics modeling of erosion, redeposition and gas retention in the ITER divertor

ORAL

Abstract

We present an integrated model designed to capture the multi-physics nature of interactions between the edge plasma and surrounding wall surfaces. This workflow includes SOLPS simulations of the edge plasma in steady-state; the effect of the sheath at shallow magnetic angles, evaluated by hPIC; GITR calculations of transport and redeposition of impurities eroded from the surface; and the response of the wall modeled by coupling F-TRIDYN and Xolotl, which evaluate surface growth and erosion and sub-surface gas dynamics. We benchmark this workflow against PISCES experiments, which measured mass loss, spectroscopy and gas concentration profiles for W substrates exposed to D-He plasmas. Given the positive comparison, we apply the model to predicting impurity migration and redeposition, surface growth and erosion, and gas recycling in the ITER divertor, under conditions expected for He and burning-plasma operations.

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Presenters

  • Ane Lasa

    University of Tennessee, University of Tennessee-Knoxville

Authors

  • Ane Lasa

    University of Tennessee, University of Tennessee-Knoxville

  • Sophie Blondel

    University of Tennessee, University of Tennessee-Knoxville

  • Guinevere Shaw

    University of Tennessee, University of Tennessee - Knoxville, Oak Ridge National Laboratory

  • Brian D. Wirth

    University of Tennessee, University of Tennessee, Knoxville, University Of Tennessee, Oak Ridge National Laboratory, Univ of Tennessee, Knoxville, University of Tennessee, Oak Ridge National Lab, University of Tennessee-Knoxville, University of Tennessee, Knoxville, Oak Ridge National Laboratory, University of Tennessee Knoxville, University of Tennessee - Knoxville, Oak Ridge National Laboratory

  • Tim Younkin

    University of Tennessee, Oak Ridge National Lab, Oak Ridge National Lab, University of Tennessee, University of Tennessee-Knoxville

  • David Edward Bernholdt

    Oak Ridge National Lab

  • John Canik

    Oak Ridge National Lab, ORNL

  • Mark R Cianciosa

    Oak Ridge National Lab

  • Wael Elwasif

    Oak Ridge National Lab, ORNL

  • D. L. Green

    Oak Ridge National Lab, Oak Ridge National Laboratory, ORNL

  • Philip C Roth

    Oak Ridge National Lab

  • D. Curreli

    Univ of Illinois - Urbana, University of Illinois at Urbana-Champaign, University of Illinois - UC

  • Jon T Drobny

    Univ of Illinois - Urbana

  • Matthew Baldwin

    Univ of California - San Diego

  • Russ Doerner

    Univ of California - San Diego, Univ of California, San Diego

  • Daisuke Nishijima

    Univ of California - San Diego