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

6 Citations (Scopus)
94 Downloads (Pure)

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
Number of pages7
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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