Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

H. A. Kumpulainen*, M. Groth, M. Fontell, A. E. Jaervinen, G. Corrigan, D. Harting

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The average tungsten concentrations in the pedestal region (cW) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with cW exceeding 10−6, the cW predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with cW <10-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.

Original languageEnglish
Article number100784
JournalNuclear Materials and Energy
Volume25
DOIs
Publication statusPublished - Dec 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Code validation
  • Impurity transport
  • Joint European Torus
  • Monte Carlo simulation
  • Scrape-off layer
  • Tungsten

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