Structural studies of deposited layers on JET MkII-SRP inner divertor tiles

Jari Likonen (Corresponding Author), J.P. Coad, Elizaveta Vainonen-Ahlgren, Tommi Renvall, D.E. Hole, M. Rubel, A. Widdowson

    Research output: Contribution to journalArticleScientificpeer-review

    28 Citations (Scopus)

    Abstract

    Deposited layers formed on JET inner divertor tiles during 1998-2004 and 2001-2004 campaigns have been investigated using secondary ion mass spectrometry (SIMS), Rutherford Backscattering (RBS) and optical microscopy. The thickness of the deposit decreases from the top of vertical tile 1 to the bottom and then increases on vertical tile 3 reaching ¡­60 ¥ìm. There are even thicker deposits on the small sloping section of the floor tile 4 that can be accessed by the plasma at the inner divertor legs. Deposited films on divertor inner wall tiles are enriched in Be indicating chemical erosion of C and a multi-step transport of C to the shadowed area on floor tile 4. The films have generally a layered and globular structure in the areas with plasma contact.
    Original languageEnglish
    Pages (from-to)190-195
    JournalJournal of Nuclear Materials
    Volume363-365
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    tiles
    Tile
    Deposits
    deposits
    Plasmas
    Rutherford backscattering spectroscopy
    Secondary ion mass spectrometry
    secondary ion mass spectrometry
    Optical microscopy
    erosion
    Erosion
    backscattering
    microscopy

    Keywords

    • Beryllium
    • Carbon based materials
    • Divertor
    • Rutherford backscattering
    • Surface analysis

    Cite this

    Likonen, J., Coad, J. P., Vainonen-Ahlgren, E., Renvall, T., Hole, D. E., Rubel, M., & Widdowson, A. (2007). Structural studies of deposited layers on JET MkII-SRP inner divertor tiles. Journal of Nuclear Materials, 363-365, 190-195. https://doi.org/10.1016/j.jnucmat.2007.01.007
    Likonen, Jari ; Coad, J.P. ; Vainonen-Ahlgren, Elizaveta ; Renvall, Tommi ; Hole, D.E. ; Rubel, M. ; Widdowson, A. / Structural studies of deposited layers on JET MkII-SRP inner divertor tiles. In: Journal of Nuclear Materials. 2007 ; Vol. 363-365. pp. 190-195.
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    abstract = "Deposited layers formed on JET inner divertor tiles during 1998-2004 and 2001-2004 campaigns have been investigated using secondary ion mass spectrometry (SIMS), Rutherford Backscattering (RBS) and optical microscopy. The thickness of the deposit decreases from the top of vertical tile 1 to the bottom and then increases on vertical tile 3 reaching ¡­60 ¥{\`i}m. There are even thicker deposits on the small sloping section of the floor tile 4 that can be accessed by the plasma at the inner divertor legs. Deposited films on divertor inner wall tiles are enriched in Be indicating chemical erosion of C and a multi-step transport of C to the shadowed area on floor tile 4. The films have generally a layered and globular structure in the areas with plasma contact.",
    keywords = "Beryllium, Carbon based materials, Divertor, Rutherford backscattering, Surface analysis",
    author = "Jari Likonen and J.P. Coad and Elizaveta Vainonen-Ahlgren and Tommi Renvall and D.E. Hole and M. Rubel and A. Widdowson",
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    Likonen, J, Coad, JP, Vainonen-Ahlgren, E, Renvall, T, Hole, DE, Rubel, M & Widdowson, A 2007, 'Structural studies of deposited layers on JET MkII-SRP inner divertor tiles', Journal of Nuclear Materials, vol. 363-365, pp. 190-195. https://doi.org/10.1016/j.jnucmat.2007.01.007

    Structural studies of deposited layers on JET MkII-SRP inner divertor tiles. / Likonen, Jari (Corresponding Author); Coad, J.P.; Vainonen-Ahlgren, Elizaveta; Renvall, Tommi; Hole, D.E.; Rubel, M.; Widdowson, A.

    In: Journal of Nuclear Materials, Vol. 363-365, 2007, p. 190-195.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Structural studies of deposited layers on JET MkII-SRP inner divertor tiles

    AU - Likonen, Jari

    AU - Coad, J.P.

    AU - Vainonen-Ahlgren, Elizaveta

    AU - Renvall, Tommi

    AU - Hole, D.E.

    AU - Rubel, M.

    AU - Widdowson, A.

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    AB - Deposited layers formed on JET inner divertor tiles during 1998-2004 and 2001-2004 campaigns have been investigated using secondary ion mass spectrometry (SIMS), Rutherford Backscattering (RBS) and optical microscopy. The thickness of the deposit decreases from the top of vertical tile 1 to the bottom and then increases on vertical tile 3 reaching ¡­60 ¥ìm. There are even thicker deposits on the small sloping section of the floor tile 4 that can be accessed by the plasma at the inner divertor legs. Deposited films on divertor inner wall tiles are enriched in Be indicating chemical erosion of C and a multi-step transport of C to the shadowed area on floor tile 4. The films have generally a layered and globular structure in the areas with plasma contact.

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    KW - Carbon based materials

    KW - Divertor

    KW - Rutherford backscattering

    KW - Surface analysis

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