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Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature
Institute for Plasma Science and Technology - CNR, via Cozzi 53, 20125 Milano, Italy, via Cozzi 53.
KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Rymd- och plasmafysik.ORCID-id: 0000-0001-9632-8104
First Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UK, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington.
Institute of Condensed Matter Chemistry and Energy Technologies - CNR, via Cozzi 53, 20125 Milano, Italy, via Cozzi 53.
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2024 (Engelska)Ingår i: Nuclear Materials and Energy, E-ISSN 2352-1791, Vol. 41, artikel-id 101735Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Runaway electron incidence on plasma facing components triggers explosive events that are accompanied by the expulsion of fast solid debris. Subsequent dust-wall high speed impacts constitute a mechanism of wall damage and dust destruction. Empirical damage laws that can be employed for erosion estimates are based on room-temperature impact experiments. We use light-gas gun shooting systems to accelerate solid tungsten dust to near-supersonic speeds towards bulk tungsten targets that are maintained at different temperatures. This concerns targets cooled down to −100°C with liquid nitrogen and targets resistively heated up to 400 °C. Post-mortem surface analysis reveals that the three erosion regimes (plastic deformation, bonding, partial disintegration) weakly depend on the target temperature within the investigated range. It is concluded that empirical damage laws based on room-temperature measurements can be safely employed for predictions.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd , 2024. Vol. 41, artikel-id 101735
Nyckelord [en]
Damage laws, Dust in tokamaks, Mechanical impacts, Runaway electron impact, Wall cratering
Nationell ämneskategori
Fusion, plasma och rymdfysik
Identifikatorer
URN: urn:nbn:se:kth:diva-353922DOI: 10.1016/j.nme.2024.101735ISI: 001318353600001Scopus ID: 2-s2.0-85203871276OAI: oai:DiVA.org:kth-353922DiVA, id: diva2:1900997
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QC 20240927

Tillgänglig från: 2024-09-25 Skapad: 2024-09-25 Senast uppdaterad: 2024-10-08Bibliografiskt granskad

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Tolias, Panagiotis

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