Development of laser-induced breakdown spectroscopy for analyzing deposited layers in ITER

Juuso Karhunen (Corresponding Author), Antti Hakola, Jari Likonen, A. Lissovski, P. Paris, M. Laan, K. Piip, C. Porosnicu, C.P. Lungu, K. Sugiyama

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    Abstract

    Laser-induced breakdown spectroscopy (LIBS) experiments on different ITER-relevant beryllium-tungsten mixtures were performed to develop LIBS for tokamak applications. Some of the samples were doped or implanted with deuterium to simulate fuel retention. The results indicate that beryllium and tungsten have a number of distinguishable spectral lines for diagnostics purposes, but detection of deuterium is challenged by its low concentration and low fluences used. By studying the depth profiles of the coatings, the removal rates of the layers were observed to depend on the thickness, composition and deuterium content of the coating. Quantitative studies of the compositions were made by calibration-free LIBS, and the results agreed well with those given by ion-beam methods.
    Original languageEnglish
    Article number014067
    Number of pages4
    JournalPhysica Scripta
    Issue numberT159
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

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    Karhunen, J., Hakola, A., Likonen, J., Lissovski, A., Paris, P., Laan, M., Piip, K., Porosnicu, C., Lungu, C. P., & Sugiyama, K. (2014). Development of laser-induced breakdown spectroscopy for analyzing deposited layers in ITER. Physica Scripta, (T159), [014067]. https://doi.org/10.1088/0031-8949/2014/T159/014067