LIBS detection of erosion/deposition and deuterium retention resulting from exposure to Pilot-PSI plasmas

K. Piip, H.J. van der Meiden, L. Hämarik, J. Karhunen, A. Hakola, M. Laan, P. Paris, M. Aints, J. Likonen, K. Bystrov, J. Kozlova, A. Saloznik, M. Kelemen, S. Markelj

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Samples with tungsten (W) and tungsten-yttrium (Y) coatings on molybdenum were exposed to plasmas simulating the divertor conditions of ITER. The exposed surfaces were studied using in-situ laser induced breakdown spectroscopy diagnostics (LIBS) and the results were compared to those obtained by other surface characterization methods. Our results show that LIBS is a reliable technique for in situ monitoring of erosion, deposition, and fuel retention processes under reactor-relevant conditions. In the regions of the highest gross erosion the thickness of the remaining tungsten layer is thinnest and at the central part of samples both mixing and deposition of components took place. LIBS also allowed reliable recording of D retention. D accumulation is influenced by the surface temperature as well as by the surface irregularities.
Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalJournal of Nuclear Materials
Volume489
DOIs
Publication statusPublished - 1 Jun 2017
MoE publication typeA1 Journal article-refereed

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Laser induced breakdown spectroscopy
laser-induced breakdown spectroscopy
Deuterium
Tungsten
erosion
deuterium
Erosion
tungsten
Plasmas
yttrium
irregularities
Yttrium
surface temperature
molybdenum
Molybdenum
recording
reactors
coatings
Coatings
Monitoring

Cite this

Piip, K. ; van der Meiden, H.J. ; Hämarik, L. ; Karhunen, J. ; Hakola, A. ; Laan, M. ; Paris, P. ; Aints, M. ; Likonen, J. ; Bystrov, K. ; Kozlova, J. ; Saloznik, A. ; Kelemen, M. ; Markelj, S. / LIBS detection of erosion/deposition and deuterium retention resulting from exposure to Pilot-PSI plasmas. In: Journal of Nuclear Materials. 2017 ; Vol. 489. pp. 129-136.
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abstract = "Samples with tungsten (W) and tungsten-yttrium (Y) coatings on molybdenum were exposed to plasmas simulating the divertor conditions of ITER. The exposed surfaces were studied using in-situ laser induced breakdown spectroscopy diagnostics (LIBS) and the results were compared to those obtained by other surface characterization methods. Our results show that LIBS is a reliable technique for in situ monitoring of erosion, deposition, and fuel retention processes under reactor-relevant conditions. In the regions of the highest gross erosion the thickness of the remaining tungsten layer is thinnest and at the central part of samples both mixing and deposition of components took place. LIBS also allowed reliable recording of D retention. D accumulation is influenced by the surface temperature as well as by the surface irregularities.",
author = "K. Piip and {van der Meiden}, H.J. and L. H{\"a}marik and J. Karhunen and A. Hakola and M. Laan and P. Paris and M. Aints and J. Likonen and K. Bystrov and J. Kozlova and A. Saloznik and M. Kelemen and S. Markelj",
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Piip, K, van der Meiden, HJ, Hämarik, L, Karhunen, J, Hakola, A, Laan, M, Paris, P, Aints, M, Likonen, J, Bystrov, K, Kozlova, J, Saloznik, A, Kelemen, M & Markelj, S 2017, 'LIBS detection of erosion/deposition and deuterium retention resulting from exposure to Pilot-PSI plasmas', Journal of Nuclear Materials, vol. 489, pp. 129-136. https://doi.org/10.1016/j.jnucmat.2017.03.044

LIBS detection of erosion/deposition and deuterium retention resulting from exposure to Pilot-PSI plasmas. / Piip, K.; van der Meiden, H.J.; Hämarik, L.; Karhunen, J.; Hakola, A.; Laan, M.; Paris, P.; Aints, M.; Likonen, J.; Bystrov, K.; Kozlova, J.; Saloznik, A.; Kelemen, M.; Markelj, S.

In: Journal of Nuclear Materials, Vol. 489, 01.06.2017, p. 129-136.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - LIBS detection of erosion/deposition and deuterium retention resulting from exposure to Pilot-PSI plasmas

AU - Piip, K.

AU - van der Meiden, H.J.

AU - Hämarik, L.

AU - Karhunen, J.

AU - Hakola, A.

AU - Laan, M.

AU - Paris, P.

AU - Aints, M.

AU - Likonen, J.

AU - Bystrov, K.

AU - Kozlova, J.

AU - Saloznik, A.

AU - Kelemen, M.

AU - Markelj, S.

PY - 2017/6/1

Y1 - 2017/6/1

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AB - Samples with tungsten (W) and tungsten-yttrium (Y) coatings on molybdenum were exposed to plasmas simulating the divertor conditions of ITER. The exposed surfaces were studied using in-situ laser induced breakdown spectroscopy diagnostics (LIBS) and the results were compared to those obtained by other surface characterization methods. Our results show that LIBS is a reliable technique for in situ monitoring of erosion, deposition, and fuel retention processes under reactor-relevant conditions. In the regions of the highest gross erosion the thickness of the remaining tungsten layer is thinnest and at the central part of samples both mixing and deposition of components took place. LIBS also allowed reliable recording of D retention. D accumulation is influenced by the surface temperature as well as by the surface irregularities.

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