Erosion of marker coatings exposed to Pilot-PSI plasma

P. Paris, Antti Hakola, K. Bystrov, G. De Temmerman, M. Aints, I. Jõgi, M. Kiisk, J. Kozlova, M. Laan (Corresponding Author), Jari Likonen, A. Lissovski

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    In this article, laser induced breakdown spectroscopy (LIBS) has been used to study plasma-induced erosion processes. Samples with ITER-relevant coatings were exposed to controlled plasma fluxes whose parameters were characteristic to those occurring in the reactor walls. After the experiments, erosion of the coatings and changes in their surface structure were determined using LIBS and a set of other surface-diagnostics methods. This way, the applicability of LIBS for in situ erosion/deposition measurements, particularly the influence of plasma exposure on the obtained LIBS spectra could be investigated in detail. Elemental depth profiles, extracted from the LIBS results matched well with those obtained by the other surface analysis methods. However, we observed that plasma-induced changes of the crystalline structure of target materials can significantly alter the laser-ablation rate. This is the main factor which influences the reliability of results obtained by LIBS.
    Original languageEnglish
    Pages (from-to)S754-S757
    Number of pages4
    JournalJournal of Nuclear Materials
    Volume438
    Issue numberSupplement
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed
    Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
    Duration: 21 May 201225 May 2012

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