ELM and inter-ELM tungsten erosion sources in high-power, JET ITER-like wall H-mode plasmas

H. A. Kumpulainen*, M. Groth, S. Brezinsek, G. Corrigan, L. Frassinetti, D. Harting, F. Koechl, J. Karhunen, A. G. Meigs, M. O'Mullane, J. Romazanov, JET Contributors

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Simulations of JET ITER-like wall high-confinement mode plasmas, including type-I edge-localised modes (ELMs), using JINTRAC for the background plasmas and ERO2.0 for tungsten erosion and transport, predict virtually perfect screening of the primary W erosion sources at the divertor targets during both the ELM and inter-ELM phases. The largest source of W influx to the main plasma is predicted to be the outer vertical divertor due to sputtering by energetic fuel (D, T) atoms from charge-exchange reactions. ERO2.0 predictions accurately reproduce the measured W I emission in the low-field side divertor, but underpredict the W II emission by a factor of 10. Potential reasons for the W II discrepancy include uncertainties in the atomic data, assumptions on the sheath properties and the sputtering angle distribution, and the impact of metastable states.

Original languageEnglish
Article number101264
Pages (from-to)1-8
Number of pages8
JournalNuclear Materials and Energy
Volume33
DOIs
Publication statusPublished - Oct 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Edge-localised mode
  • ERO2.0
  • Erosion
  • JET
  • JINTRAC
  • Spectroscopy
  • Tungsten

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