Ion beam micro analysis of deposits at tokamak divertor surfaces

P. Petersson (Corresponding Author), H. Bergsåker, G. Possnert, J. P. Coad, Seppo Koivuranta, Jari Likonen

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.
    Original languageEnglish
    Pages (from-to)1838-1841
    Number of pages4
    JournalNuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
    Volume268
    Issue number11-12
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Microanalysis
    microanalysis
    Ion beams
    Beryllium
    Deposits
    Deuterium
    beryllium
    ion beams
    deposits
    deuterium
    Joint European Torus
    Nuclear reactions
    surface treatment
    Polishing
    polishing
    nuclear reactions
    Surface treatment
    cut-off
    spatial resolution
    Carbon

    Keywords

    • Beryllium
    • Deuterium
    • Micro-beam
    • Nuclear reaction analysis

    Cite this

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    title = "Ion beam micro analysis of deposits at tokamak divertor surfaces",
    abstract = "Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.",
    keywords = "Beryllium, Deuterium, Micro-beam, Nuclear reaction analysis",
    author = "P. Petersson and H. Bergs{\aa}ker and G. Possnert and Coad, {J. P.} and Seppo Koivuranta and Jari Likonen",
    year = "2010",
    doi = "10.1016/j.nimb.2010.02.025",
    language = "English",
    volume = "268",
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    Ion beam micro analysis of deposits at tokamak divertor surfaces. / Petersson, P. (Corresponding Author); Bergsåker, H.; Possnert, G.; Coad, J. P.; Koivuranta, Seppo; Likonen, Jari.

    In: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, Vol. 268, No. 11-12, 2010, p. 1838-1841.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Ion beam micro analysis of deposits at tokamak divertor surfaces

    AU - Petersson, P.

    AU - Bergsåker, H.

    AU - Possnert, G.

    AU - Coad, J. P.

    AU - Koivuranta, Seppo

    AU - Likonen, Jari

    PY - 2010

    Y1 - 2010

    N2 - Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.

    AB - Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.

    KW - Beryllium

    KW - Deuterium

    KW - Micro-beam

    KW - Nuclear reaction analysis

    U2 - 10.1016/j.nimb.2010.02.025

    DO - 10.1016/j.nimb.2010.02.025

    M3 - Article

    VL - 268

    SP - 1838

    EP - 1841

    JO - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

    JF - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

    SN - 0168-583X

    IS - 11-12

    ER -