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

K. Piip; H.J. van der Meiden; Lauri Hämärik; J. Karhunen; A. Hakola; M. Laan; P. Paris; M. Aints; J. Likonen; Kiril Bystrov; J. Kozlova; A. Zaloznik; Mitja Kelemen; Sabina Markelj

doi:10.1016/j.jnucmat.2017.03.044

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

K. Piip, H.J. van der Meiden, Lauri Hämärik, J. Karhunen, A. Hakola, M. Laan^*, P. Paris, M. Aints, J. Likonen, Kiril Bystrov, J. Kozlova, A. Zaloznik, Mitja Kelemen, Sabina Markelj

^*Corresponding author for this work

Department of Applied Physics

Research output: Contribution to journal › Article › Scientific › peer-review

18 Citations (Scopus)

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 language	English
Pages (from-to)	129-136
Number of pages	8
Journal	Journal of Nuclear Materials
Volume	489
DOIs	https://doi.org/10.1016/j.jnucmat.2017.03.044
Publication status	Published - Jun 2017
MoE publication type	A1 Journal article-refereed

Keywords

TUNGSTEN
DIVERTOR
FLUX
ITER
SURFACE

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Piip, K., van der Meiden, H. J., Hämärik, L., Karhunen, J., Hakola, A., Laan, M., Paris, P., Aints, M., Likonen, J., Bystrov, K., Kozlova, J., Zaloznik, 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, 489, 129-136. https://doi.org/10.1016/j.jnucmat.2017.03.044

@article{7ffbdd69f25049fc9a38703c24f83d1d,

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

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.",

keywords = "TUNGSTEN, DIVERTOR, FLUX, ITER, SURFACE",

author = "K. Piip and {van der Meiden}, H.J. and Lauri H{\"a}m{\"a}rik and J. Karhunen and A. Hakola and M. Laan and P. Paris and M. Aints and J. Likonen and Kiril Bystrov and J. Kozlova and A. Zaloznik and Mitja Kelemen and Sabina Markelj",

year = "2017",

month = jun,

doi = "10.1016/j.jnucmat.2017.03.044",

language = "English",

volume = "489",

pages = "129--136",

journal = "Journal of Nuclear Materials",

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publisher = "ELSEVIER SCIENCE B.V.",

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Piip, K, van der Meiden, HJ, Hämärik, L, Karhunen, J, Hakola, A, Laan, M, Paris, P, Aints, M, Likonen, J, Bystrov, K, Kozlova, J, Zaloznik, 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

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 - Hämärik, Lauri

AU - Karhunen, J.

AU - Hakola, A.

AU - Laan, M.

AU - Paris, P.

AU - Aints, M.

AU - Likonen, J.

AU - Bystrov, Kiril

AU - Kozlova, J.

AU - Zaloznik, A.

AU - Kelemen, Mitja

AU - Markelj, Sabina

PY - 2017/6

Y1 - 2017/6

N2 - 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.

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.

KW - TUNGSTEN

KW - DIVERTOR

KW - FLUX

KW - ITER

KW - SURFACE

U2 - 10.1016/j.jnucmat.2017.03.044

DO - 10.1016/j.jnucmat.2017.03.044

M3 - Article

VL - 489

SP - 129

EP - 136

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

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

Abstract

Keywords

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