Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B

M Wisse (Corresponding Author), L Marot, A Widdowson, M Rubel, D Ivanova, P Petersson, R P Doerner, M J Baldwin, Jari Likonen, E Alves, Antti Hakola, Seppo Koivuranta, R Steiner, E Meyer

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)

    Abstract

    A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well
    Original languageEnglish
    Pages (from-to)122-130
    Number of pages8
    JournalFusion Engineering and Design
    Volume89
    Issue number2
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Beryllium
    Cleaning
    Mirrors
    Lasers
    Vacuum
    Carbon
    Tritium
    Pulsed lasers
    Deposits
    Plasmas

    Keywords

    • Beryllium
    • first mirrors
    • ITER
    • laser cleaning

    Cite this

    Wisse, M., Marot, L., Widdowson, A., Rubel, M., Ivanova, D., Petersson, P., ... Meyer, E. (2014). Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. Fusion Engineering and Design, 89(2), 122-130. https://doi.org/10.1016/j.fusengdes.2014.01.042
    Wisse, M ; Marot, L ; Widdowson, A ; Rubel, M ; Ivanova, D ; Petersson, P ; Doerner, R P ; Baldwin, M J ; Likonen, Jari ; Alves, E ; Hakola, Antti ; Koivuranta, Seppo ; Steiner, R ; Meyer, E. / Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. In: Fusion Engineering and Design. 2014 ; Vol. 89, No. 2. pp. 122-130.
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    abstract = "A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well",
    keywords = "Beryllium, first mirrors, ITER, laser cleaning",
    author = "M Wisse and L Marot and A Widdowson and M Rubel and D Ivanova and P Petersson and Doerner, {R P} and Baldwin, {M J} and Jari Likonen and E Alves and Antti Hakola and Seppo Koivuranta and R Steiner and E Meyer",
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    Wisse, M, Marot, L, Widdowson, A, Rubel, M, Ivanova, D, Petersson, P, Doerner, RP, Baldwin, MJ, Likonen, J, Alves, E, Hakola, A, Koivuranta, S, Steiner, R & Meyer, E 2014, 'Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B', Fusion Engineering and Design, vol. 89, no. 2, pp. 122-130. https://doi.org/10.1016/j.fusengdes.2014.01.042

    Laser-assisted cleaning of beryllium-containing mirror samples from JET and PISCES-B. / Wisse, M (Corresponding Author); Marot, L; Widdowson, A; Rubel, M; Ivanova, D; Petersson, P; Doerner, R P; Baldwin, M J; Likonen, Jari; Alves, E; Hakola, Antti; Koivuranta, Seppo; Steiner, R; Meyer, E.

    In: Fusion Engineering and Design, Vol. 89, No. 2, 2014, p. 122-130.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Wisse, M

    AU - Marot, L

    AU - Widdowson, A

    AU - Rubel, M

    AU - Ivanova, D

    AU - Petersson, P

    AU - Doerner, R P

    AU - Baldwin, M J

    AU - Likonen, Jari

    AU - Alves, E

    AU - Hakola, Antti

    AU - Koivuranta, Seppo

    AU - Steiner, R

    AU - Meyer, E

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    AB - A set of seven polycrystalline mirror samples retrieved from the JET tokamak has been cleaned in vacuum using a pulsed laser system. The surfaces of samples exposed to plasma during 2008-2009 campaigns as part of the second phase of a comprehensive first mirror test contained a mixture of carbon, beryllium and tritium. For this reason, the samples were treated in a vacuum chamber constructed specially for this purpose. In some cases mirrors show an increase of the specular reflectivity after cleaning, though beryllium and carbon deposits were not fully removed. Additionally, three samples coated in PISCES-B with a 110-120 nm beryllium layer were subjected to laser cleaning tests as well

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    KW - first mirrors

    KW - ITER

    KW - laser cleaning

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