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Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers

Silicon plates were installed above the inner and outer divertor of the JET with the ITER-like wall (ILW) after the second and third ILW campaigns to monitor dust generation and deposition with the aim to determine the morphology and content of individual particles and co-deposits, including deuteri...

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Autores principales: Fazinić, Stjepko, Provatas, Georgios, Božičević Mihalić, Iva, Tadić, Tonči, Rubel, Marek, Grzonka, Justyna, Petersson, Per, Widdowson, Anna, Moon, Sunwoo, Fortuna-Zaleśna, Elzbieta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740336/
https://www.ncbi.nlm.nih.gov/pubmed/36499848
http://dx.doi.org/10.3390/ma15238353
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author Fazinić, Stjepko
Provatas, Georgios
Božičević Mihalić, Iva
Tadić, Tonči
Rubel, Marek
Grzonka, Justyna
Petersson, Per
Widdowson, Anna
Moon, Sunwoo
Fortuna-Zaleśna, Elzbieta
author_facet Fazinić, Stjepko
Provatas, Georgios
Božičević Mihalić, Iva
Tadić, Tonči
Rubel, Marek
Grzonka, Justyna
Petersson, Per
Widdowson, Anna
Moon, Sunwoo
Fortuna-Zaleśna, Elzbieta
author_sort Fazinić, Stjepko
collection PubMed
description Silicon plates were installed above the inner and outer divertor of the JET with the ITER-like wall (ILW) after the second and third ILW campaigns to monitor dust generation and deposition with the aim to determine the morphology and content of individual particles and co-deposits, including deuterium content. Particular interest was in metal-based particles: Be, W, steel, Cu. Ex-situ examination after two ILW campaigns was performed by a set of microscopy and ion beam methods including micro-beam nuclear reaction analysis and particle-induced X-ray emission. Different categories of Be-rich particles were found: co-deposits peeled-off from plasma-facing components (PFC), complex multi-element spherical objects, and solid metal splashes and regular spherical droplets. The fuel content on the two latter categories was at the level of 1 × 10(16) at/cm(−2) indicating that Be melting and splashing occurred in the very last phase of the second experimental campaign. The splashes adhere firmly to the substrate thus not posing risk of Be dust mobilisation. No tungsten droplets were detected. The only W-containing particles were fragments of tungsten coatings from the divertor tiles.
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spelling pubmed-97403362022-12-11 Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers Fazinić, Stjepko Provatas, Georgios Božičević Mihalić, Iva Tadić, Tonči Rubel, Marek Grzonka, Justyna Petersson, Per Widdowson, Anna Moon, Sunwoo Fortuna-Zaleśna, Elzbieta Materials (Basel) Article Silicon plates were installed above the inner and outer divertor of the JET with the ITER-like wall (ILW) after the second and third ILW campaigns to monitor dust generation and deposition with the aim to determine the morphology and content of individual particles and co-deposits, including deuterium content. Particular interest was in metal-based particles: Be, W, steel, Cu. Ex-situ examination after two ILW campaigns was performed by a set of microscopy and ion beam methods including micro-beam nuclear reaction analysis and particle-induced X-ray emission. Different categories of Be-rich particles were found: co-deposits peeled-off from plasma-facing components (PFC), complex multi-element spherical objects, and solid metal splashes and regular spherical droplets. The fuel content on the two latter categories was at the level of 1 × 10(16) at/cm(−2) indicating that Be melting and splashing occurred in the very last phase of the second experimental campaign. The splashes adhere firmly to the substrate thus not posing risk of Be dust mobilisation. No tungsten droplets were detected. The only W-containing particles were fragments of tungsten coatings from the divertor tiles. MDPI 2022-11-24 /pmc/articles/PMC9740336/ /pubmed/36499848 http://dx.doi.org/10.3390/ma15238353 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fazinić, Stjepko
Provatas, Georgios
Božičević Mihalić, Iva
Tadić, Tonči
Rubel, Marek
Grzonka, Justyna
Petersson, Per
Widdowson, Anna
Moon, Sunwoo
Fortuna-Zaleśna, Elzbieta
Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title_full Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title_fullStr Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title_full_unstemmed Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title_short Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
title_sort dust monitors in jet with iter-like wall for diagnosis of mobilized particles and co-deposited layers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9740336/
https://www.ncbi.nlm.nih.gov/pubmed/36499848
http://dx.doi.org/10.3390/ma15238353
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