Dust collection after the high fluence campaign of the WEST tokamak

• Tungsten multiscale dust. • Tungsten layer exfoliation in tokamaks. • Nanoparticles in tokamaks. For Phase 2 of WEST, the lower divertor was entirely equipped with actively cooled ITER grade plasma-facing units made of chains of tungsten beveled monoblocks. In this configuration, dust particles were collected in 2023, after the first plasma campaign mainly dedicated to repetitive long pulses in the conditions of attached plasmas to the divertor. Due to a high particle fluence and a significant tungsten erosion, large quantities of dust were produced. In addition to those produced during off-normal events and the flaking of deposits which are typical of tokamak wall erosion, dust particles due to the flaking of pure tungsten thin layers deposited on the shadowed areas of beveled monoblocks were found. As specific characteristic, these thin layers may not adhere to the divertor and consequently, may be peeled off and mobilized during plasma operation.

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Publication Details

Journal
Nuclear Materials and Energy
Published
2024-12-20
DOI
https://doi.org/10.1016/j.nme.2024.101848
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
0.00

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article

Dust collection after the high fluence campaign of the WEST tokamak

F. Gensdarmes, C. Martin, S. Peillon, Andréa Campos et al.
Nuclear Materials and Energy
Magnetic confinement fusion research
article

Dust collection after the high fluence campaign of the WEST tokamak

F. Gensdarmes, C. Martin, S. Peillon, Andréa Campos, C. Brun, M. Diez, E. Bernard, C. Arnas, E. Tsitrone
article en

Abstract

• Tungsten multiscale dust. • Tungsten layer exfoliation in tokamaks. • Nanoparticles in tokamaks. For Phase 2 of WEST, the lower divertor was entirely equipped with actively cooled ITER grade plasma-facing units made of chains of tungsten beveled monoblocks. In this configuration, dust particles were collected in 2023, after the first plasma campaign mainly dedicated to repetitive long pulses in the conditions of attached plasmas to the divertor. Due to a high particle fluence and a significant tungsten erosion, large quantities of dust were produced. In addition to those produced during off-normal events and the flaking of deposits which are typical of tokamak wall erosion, dust particles due to the flaking of pure tungsten thin layers deposited on the shadowed areas of beveled monoblocks were found. As specific characteristic, these thin layers may not adhere to the divertor and consequently, may be peeled off and mobilized during plasma operation.

Nuclear Materials and EnergyVol. 42
Centre National de la Recherche Scientifique (FR), Aix-Marseille Université (FR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), CEA Cadarache (FR), Direction des Energies (FR), Centrale Méditerranée (FR), Physique des interactions ioniques et moléculaires (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR)
EUROfusion, European Commission
Climate action
Openalex Percentile: Top 93%
Magnetic confinement fusion research
DOIOpen Access PDFOpenAlex
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