Gyrokinetic modeling of tungsten transport and radiation in WEST and ASDEX Upgrade plasmas: towards the kinetic modeling of ITER physics

ORAL

Abstract

Understanding the impact of tungsten on tokamak performance and its mitigation by low-Z impurities is key to the success of ITER operations. A novel self-consistent gyrokinetic model, integrated into the XGC code [1,2], has been developed to comprehensively analyze tungsten transport and radiation. In this model, the tungsten ions are represented by a few bundles, with their fractional abundance determined by the atomic balance between ionization and recombination processes derived from ADAS rates [3]. The electron cooling by tungsten radiation is also derived from ADAS rates. This new model enables the study of tungsten radiation, transport dynamics, and interactions with low-Z species. Two complementary tungsten studies will be presented. First, we study the impact of nitrogen on the collisional and turbulent peaking factors of tungsten in a WEST plasma. Second, we explore the intricate interplay between collisional and turbulent transport in an H-mode plasma scenario of ASDEX Upgrade containing boron impurities. Analysis of tungsten radiation with synthetic diagnostics will be discussed, along with the temperature screening effect in ITER-relevant plasmas.

[1] J Dominski et al. J. Plasm. Phys. (2019)

[2] J Dominski et al. Phys Plasmas (2024)

[3] https://www.adas.ac.uk

[4] J Dominski et al. "Influence of nitrogen impurities on the tungsten peaking in total-f gyrokinetic simulations of an ohmic plasma of WEST" to be submitted

*This research was supported by the SciDAC project "Computational Evaluation and Design of Actuators for Core-Edge Integration" (CEDA) under contract number DE-FOA-0002924.This research used INCITE resources of the Oak Ridge Leadership Computing Facilities at the Oak Ridge National Laboratory (OLCF) and Argonne National Laboratory (ALCF), and resources of the National Energy Research Scientific Computing Center (NERSC), which are supported by the Office of Science of the U.S. Department of Energy under Contract Nos. DE-AC05-00OR22725 and DE-AC02-05CH11231, respectively.

–

Publication: [1] Dominski et al. J. Plasm. Phys. (2019)
[2] Dominski et al. Phys Plasmas (2024)
[3] https://www.adas.ac.uk
[4] Dominski et al. "Influence of nitrogen impurities on the tungsten peaking in total-f gyrokinetic simulations of an ohmic plasma of WEST" to be submitted

Presenters

  • Julien Dominski

    • Princeton Plasma Physics Laboratory

Authors

  • Julien Dominski

    • Princeton Plasma Physics Laboratory

  • C. S Chang

    • Princeton Plasma Physics Laboratory
    • Princeton University

  • Robert Hager

    • Princeton Plasma Physics Laboratory

  • Arne Kallenbach

    • Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching, Germany
    • Max-Planck-Institute for Plasmaphysics
    • Max-Planck-Institute for Plasmaphysics (Garching)

  • Seung-Hoe Ku

    • Princeton Plasma Physics Laboratory
    • Princeton University

  • Patrick Maget

    • CEA, IRFM

  • Pierre Manas

    • CEA Cadarache
    • CEA, IRFM

  • Jorge Morales

    • CEA, IRFM

  • Martin OMullane

    • CCFE

  • Thomas Pütterich

    • Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching, Germany
    • Max-Planck-Institute for Plasmaphysics (Garching)

  • Aaron Scheinberg

    • Jubilee Development

  • Eleonora Viezzer

    • Department of Atomic, Molecular and Nuclear Physics, University of Seville, Av. Reina Mercedes, Seville, 41012, Spain
    • University of Seville