Nuclear reaction analysis with ion microbeam of cross sections of surface layers deposited in a tokamak divertor

H. Bergsåker (Corresponding Author), B. Emmoth, P. Petersson, G. Possnert, J.P. Coad, Jari Likonen, Tommi Renvall

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    Abstract

    Ion micro beam analysis has been applied to the investigation of plasma deposited layers covering the divertor tiles in the JET tokamak.
    Since the layers are about 100 μm thick they are too thick to be completely investigated by ordinary ion beam analysis. Cross sections of the layers were prepared by cutting and polishing. Elemental depth profiles were determined from the two dimensional images that could be derived by nuclear reaction analysis and resonant backscattering spectrometry, using ion beams focused to a few μm spot size.
    A combination of analysis methods are shown, which allow measurements of the concentration profiles of carbon, beryllium, deuterium, oxygen and stainless steel components at levels of a few percent, with an accuracy better than 10%.
    Original languageEnglish
    Pages (from-to)215-221
    JournalJournal of Nuclear Materials
    Volume362
    Issue number2-3
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • surface analysis
    • divertor
    • JET
    • ITER
    • tokamak
    • fusion energy
    • plasma
    • layers

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