Understanding pedestal transport via combined gyrokinetic and edge modeling

POSTER

Abstract

This presentation will report on the FY19 theory performance target (TPT), whose goal is to identify the turbulent transport mechanisms that affect pedestal dynamics. This is achieved via two sets of computational tools: (1) gyrokinetic codes (GENE and CGYRO), which can analyze the instabilities and resulting transport in the pedestal, and (2) edge codes (SOLPS and UEDGE), which, when operated in interpretive mode, can provide the best possible estimate of particle and heat sources--e.g., the ionization density source and the atomic energy loss channels due to ionization, charge exchange, and radiation. Such information, in combination with available fluctuation data and observed inter-ELM profile evolution, provides powerful constraints on the candidate instabilities that may govern pedestal transport. Comparisons will be made with discharges spanning multiple devices, large ranges in dimensionless parameters, multiple modes of operation (e.g., ELMy H-mode, I-mode, QH mode, etc.), wall materials, and fueling levels.

Authors

  • David Hatch

    • IFS/University of Texas
    • University of Texas at Austin
    • Institute for Fusion Studies
    • Institute of Fusion Studies, University of Texas at Austin
    • UT Austin

  • M. Kotschenreuther

    • University of Texas at Austin
    • UT Austin

  • S. Mahajan

    • University of Texas at Austin
    • Institute for Fusion Studies, University of Texas at Austin, Austin
    • UT Austin

  • M. Halfmoon

    • University of Texas at Austin
    • Institute for Fusion Studies
    • UT Austin

  • E. Hassan

    • Institute of Fusion Studies, University of Texas at Austin
    • UT Austin

  • G. Merlo

    • UT Austin

  • Craig Michoski

    • UT Austin
    • University of Texas at Austin

  • John Canik

    • ORNL

  • I. Joseph

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory
    • LLNL

  • M. Umansky

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab
    • LLNL, CA, USA
    • LLNL

  • Walter Guttenfelder

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Ahmed Diallo

    • PPPL
    • Princeton Plasma Physics Lab
    • Princeton Plasma Physics Laboratory

  • Richard Groebner

    • GA
    • General Atomics

  • A. Nelson

    • Princeton Plasma Physics Laboratory
    • Princeton University / Princeton Plasma Physics Laboratory
    • PPPL

  • F. Laggner

    • Princeton Plasma Physics Laboratory
    • PPPL
    • Princeton University / Princeton Plasma Physics Laboratory
    • Princeton Plasma Physics Lab

  • J.W. Hughes

    • MIT-PSFC
    • MIT
    • MIT PSFC
    • Plasma Science and Fusion Center, MIT

  • S. Mordijck

    • Department of Physics, College of William and Mary, Williamsburg, VA 23187, USA
    • College of William and Mary
    • College of William & Mary
    • William and Mary