Tungsten divertor sources in WEST related to impurity inventory and local plasma conditions

G.J. van Rooij (Corresponding author), Olivier Meyer, S. Brezinsek, C. Desgranges, D. Douai, S. Ertmer, A. Gallo, C. Gil, J. Gunn, T. Loarer, E. Tsitrone

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

A dedicated series of L-mode deuterium discharges were performed in WEST in which a broad parameter space in terms of divertor plasma temperature (inner divertor at <10 eV, outer divertor up to 50 eV) and impurity flux density was achieved by variation of X point elevation, upstream plasma density and fuelling position and rate. Density steps provided stable reference plasma conditions whilst density scans up to the point of detachment revealed the sputtering threshold behaviour of the dominant sputtering species. Tungsten gross erosion was quantified via the common WI 400.9 nm line and correlated with the residual gas content.

Original languageEnglish
Article number014060
Number of pages4
JournalPhysica Scripta
Volume2020
Issue numberT171
DOIs
Publication statusPublished - 16 Mar 2020
Event17th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2019 - Eindhoven, Netherlands
Duration: 20 May 201924 May 2019

Keywords

  • Nuclear fusion
  • Optical emission spectroscopy
  • Plasma-surface interaction
  • Tungsten erosion
  • West

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