Neoclassical calculations for W7-X OP1.1 parameters

POSTER

Abstract

Neoclassical calculations are carried out for W7-X OP1.1 plasmas with the SFINCS code, using experimental profiles of $n_{\mathrm{e}}$, $T_{\mathrm{e}}$, and $T_{\mathrm{i}}$. An electron root solution is found in the inner part of the plasma, consistent with measurements. Calculations are performed using a variety of assumptions for the plasma's impurity composition. Impurities modestly reduce the bootstrap current, and if a flat $Z_{\mathrm{eff}}$ profile is assumed, the impurity particle flux profile resembles the $E_{r}$ profile due to dominance of the associated thermodynamic force. Variations of quantities on flux surfaces computed with SFINCS are also presented. The incompressible-ExB approximation is found to be quite accurate for W7-X parameters.

Authors

  • Matt Landreman

    • University of Maryland
    • University of Maryland, College Park
  • A Alonso

    • CIEMAT
  • C D Beidler

    • IPP Greifswald
  • S Bozhenkov

    • IPP Greifswald
  • A Dinklage

    • IPP Greifswald
  • G Fuchert

    • IPP Greifswald
  • J Geiger

    • IPP Greifswald
  • M Hirsch

    • IPP Greifswald
  • A Kr\"{a}mer-Flecken

    • Forschungszentrum J\"{u}lich
  • A Langenberg

    • IPP Greifswald
  • H Maassberg

    • IPP Greifswald
  • A Moll\'{e}n

    • IPP Greifswald
  • N Pablant

    • PPPL
  • E Pasch

    • IPP Greifswald
  • S Satake

    • NIFS
  • H M Smith

    • IPP Greifswald
  • P Traverso

    • Auburn
  • Y Turkin

    • IPP Greifswald
  • P Valson

    • IPP Greifswald
  • J L Velasco

    • CIEMAT
  • T Windisch

    • IPP Greifswald
  • D Zhang

    • IPP Greifswald