The emissivity of W coatings deposited on carbon materials for fusion applications

C. Ruset, D. Faliea, E. Grigore, M. Gherendi, V. Zoita, K.-D. Zastrow, G. Matthews, X. Courtois, J. Bucalossi, J. Likonen, JET contributors

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    Tungsten coatings deposited on carbon materials such as carbon fiber composite (CFC) or fine grain graphite are currently used in fusion devices as amour for plasma facing components (PFC). More than 4000 carbon tiles were W-coated by Combined Magnetron Sputtering and Ion Implantation technology for the ITER-like Wall at JET, ASDEX Upgrade and WEST tokamaks. The emissivity of W coatings is a key parameter required by protection systems of the W-coated PFC and also by the diagnostic tools in order to get correct values of temperature and heat loading. The emissivity of tungsten is rather well known, but the literature data refer to bulk tungsten or tungsten foils and not to coatings deposited on carbon materials. The emissivity was measured at the wavelengths of 1.064 μm, 1.75 μm, 3.75 μm and 4.0 μm. It was found that the structure of the substrate has a significant influence on the emissivity values. The temperature dependence of the emissivity in the range of 400 °C–1200 °C and the influence of the viewing angle were investigated as well. The results are given in a table for W coatings and for other materials of interest for fusion such as bulk W and bulk Be.

    Original languageEnglish
    Pages (from-to)192-195
    Number of pages4
    JournalFusion Engineering and Design
    Volume114
    DOIs
    Publication statusPublished - 1 Jan 2017
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Tungsten
    Fusion reactions
    Carbon
    Coatings
    Plasmas
    Graphite
    Tile
    Ion implantation
    Magnetron sputtering
    Metal foil
    Carbon fibers
    Wavelength
    Temperature
    Composite materials
    Substrates

    Keywords

    • emissivity
    • tungsten coatings
    • carbon fiber composite (CFC)
    • m,1.75 ITER-like wall
    • ITER-like wall

    Cite this

    Ruset, C., Faliea, D., Grigore, E., Gherendi, M., Zoita, V., Zastrow, K-D., ... contributors, JET. (2017). The emissivity of W coatings deposited on carbon materials for fusion applications. Fusion Engineering and Design, 114, 192-195. https://doi.org/10.1016/j.fusengdes.2016.12.015
    Ruset, C. ; Faliea, D. ; Grigore, E. ; Gherendi, M. ; Zoita, V. ; Zastrow, K.-D. ; Matthews, G. ; Courtois, X. ; Bucalossi, J. ; Likonen, J. ; contributors, JET. / The emissivity of W coatings deposited on carbon materials for fusion applications. In: Fusion Engineering and Design. 2017 ; Vol. 114. pp. 192-195.
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    abstract = "Tungsten coatings deposited on carbon materials such as carbon fiber composite (CFC) or fine grain graphite are currently used in fusion devices as amour for plasma facing components (PFC). More than 4000 carbon tiles were W-coated by Combined Magnetron Sputtering and Ion Implantation technology for the ITER-like Wall at JET, ASDEX Upgrade and WEST tokamaks. The emissivity of W coatings is a key parameter required by protection systems of the W-coated PFC and also by the diagnostic tools in order to get correct values of temperature and heat loading. The emissivity of tungsten is rather well known, but the literature data refer to bulk tungsten or tungsten foils and not to coatings deposited on carbon materials. The emissivity was measured at the wavelengths of 1.064 μm, 1.75 μm, 3.75 μm and 4.0 μm. It was found that the structure of the substrate has a significant influence on the emissivity values. The temperature dependence of the emissivity in the range of 400 °C–1200 °C and the influence of the viewing angle were investigated as well. The results are given in a table for W coatings and for other materials of interest for fusion such as bulk W and bulk Be.",
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    author = "C. Ruset and D. Faliea and E. Grigore and M. Gherendi and V. Zoita and K.-D. Zastrow and G. Matthews and X. Courtois and J. Bucalossi and J. Likonen and JET contributors",
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    Ruset, C, Faliea, D, Grigore, E, Gherendi, M, Zoita, V, Zastrow, K-D, Matthews, G, Courtois, X, Bucalossi, J, Likonen, J & contributors, JET 2017, 'The emissivity of W coatings deposited on carbon materials for fusion applications', Fusion Engineering and Design, vol. 114, pp. 192-195. https://doi.org/10.1016/j.fusengdes.2016.12.015

    The emissivity of W coatings deposited on carbon materials for fusion applications. / Ruset, C.; Faliea, D.; Grigore, E.; Gherendi, M.; Zoita, V.; Zastrow, K.-D.; Matthews, G.; Courtois, X.; Bucalossi, J.; Likonen, J.; contributors, JET.

    In: Fusion Engineering and Design, Vol. 114, 01.01.2017, p. 192-195.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Grigore, E.

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    AU - Zoita, V.

    AU - Zastrow, K.-D.

    AU - Matthews, G.

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