Thermo-oxidation and analysis of JET codeposits

A. A. Haasz (Corresponding Author), Jari Likonen, J. P. Coad, C. K. Tsui, J. W. Davis, A. M. Widdowson

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.
    Original languageEnglish
    Pages (from-to)626-630
    Number of pages5
    JournalJournal of Nuclear Materials
    Volume390-391
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Oxidation
    oxidation
    Profilometry
    Deuterium
    tiles
    Tile
    Secondary ion mass spectrometry
    secondary ion mass spectrometry
    deuterium

    Cite this

    Haasz, A. A., Likonen, J., Coad, J. P., Tsui, C. K., Davis, J. W., & Widdowson, A. M. (2009). Thermo-oxidation and analysis of JET codeposits. Journal of Nuclear Materials, 390-391, 626-630. https://doi.org/10.1016/j.jnucmat.2009.01.303
    Haasz, A. A. ; Likonen, Jari ; Coad, J. P. ; Tsui, C. K. ; Davis, J. W. ; Widdowson, A. M. / Thermo-oxidation and analysis of JET codeposits. In: Journal of Nuclear Materials. 2009 ; Vol. 390-391. pp. 626-630.
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    abstract = "Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.",
    author = "Haasz, {A. A.} and Jari Likonen and Coad, {J. P.} and Tsui, {C. K.} and Davis, {J. W.} and Widdowson, {A. M.}",
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    Haasz, AA, Likonen, J, Coad, JP, Tsui, CK, Davis, JW & Widdowson, AM 2009, 'Thermo-oxidation and analysis of JET codeposits', Journal of Nuclear Materials, vol. 390-391, pp. 626-630. https://doi.org/10.1016/j.jnucmat.2009.01.303

    Thermo-oxidation and analysis of JET codeposits. / Haasz, A. A. (Corresponding Author); Likonen, Jari; Coad, J. P.; Tsui, C. K.; Davis, J. W.; Widdowson, A. M.

    In: Journal of Nuclear Materials, Vol. 390-391, 2009, p. 626-630.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Thermo-oxidation and analysis of JET codeposits

    AU - Haasz, A. A.

    AU - Likonen, Jari

    AU - Coad, J. P.

    AU - Tsui, C. K.

    AU - Davis, J. W.

    AU - Widdowson, A. M.

    PY - 2009

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    N2 - Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.

    AB - Following the thermo-oxidation study of D removal from JET divertor codeposits, post oxidation surface analyses were performed using SIMS, NRA and profilometry. The analysis confirms that the D content was reduced by at least an order of magnitude after 8-h oxidation at 623 K (350 °C) and 21 kPa (160 Torr) O2 pressure – in agreement with TDS measurements. The codeposits studied contain Be and C. Those on the vertical tile surfaces have a duplex structure with a C-D rich layer on the surface and a Be–C layer underneath; during oxidation the outer layer is removed and the inner layer remains. Codeposits with low Be content from the shadowed area have single-layer structures; during oxidation their thicknesses were reduced by about an order of magnitude. For the JET codeposits studied (with Be/C up to ∼1) it appears that Be does not affect the oxidative removal of deuterium from the codeposit in a significant way.

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    JO - Journal of Nuclear Materials

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