Modeling of plasma facing component erosion, impurity migration, dust transport and melting processes at JET-ILW

I. Borodkina*, D. V. Borodin, D. Douai, J. Romazanov, E. Pawelec, E. de la Cal, H. Kumpulainen, S. Ratynskaia, L. Vignitchouk, D. Tskhakaya, A. Kirschner, E. Lazzaro, A. Uccello, S. Brezinsek, T. Dittmar, M. Groth, A. Huber, E. Thoren, G. Gervasini, F. GhezziF. Causa, A. Widdowson, K. Lawson, D. Matveev, S. Wiesen, L. Laguardia, JET Contributors

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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Abstract

An overview of the modeling approaches, validation methods and recent main results of analysis and modeling activities related to the plasma-surface interaction (PSI) in JET-ILW experiments, including the recent H/D/T campaigns, is presented in this paper. Code applications to JET experiments improve general erosion/migration/retention prediction capabilities as well as various physics extensions, for instance a treatment of dust particles transport and a detailed description of melting and splashing of PFC induced by transient events at JET. 2D plasma edge transport codes like the SOLPS-ITER code as well as PSI codes are key to realistic description of relevant physical processes in power and particle exhaust. Validation of the PSI and edge transport models across JET experiments considering various effects (isotope effects, first wall geometry, including detailed 3D shaping of plasma-facing components, self-sputtering, thermo-forces, physical and chemically assisted physical sputtering formation of W and Be hydrides) is very important for predictive simulations of W and Be erosion and migration in ITER as well as for increasing quantitative credibility of the models. JET also presents a perfect test-bed for the investigation and modeling of melt material dynamics and its splashing and droplet ejection mechanisms. We attribute the second group of processes rather to transient events as for the steady state and, thus, treat those as independent additions outside the interplay with the first group.

Original languageEnglish
Article number106009
Pages (from-to)1-14
Number of pages14
JournalNuclear Fusion
Volume64
Issue number10
DOIs
Publication statusPublished - Oct 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • beryllium
  • impurity transport
  • isotope effect
  • JET
  • physical erosion
  • plasma surface interaction codes
  • tungsten

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