Performances of Rh and Mo mirrors under JET exposure

Laurent Marot*, E. Meyer, M. Rubel, D. Ivanova, A. Widdowson, J.P. Coad, Jari Likonen, Antti Hakola, Seppo Koivuranta, G. De Temmerman, JET-EFDA contributors

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)

    Abstract

    The aim of this work was to provide a comprehensive surface characterization of rhodium and molybdenum mirrors exposed on the main chamber wall of JET during campaigns with carbon plasma-facing components. As determined using X-ray photoelectron spectroscopy, Secondary Ion Mass Spectrometry, Scanning Electron Microscopy and optical measurements the co-deposits formed on the mirrors were composed of C, Be, Ni, Mo and Fe. Most of the metallic elements on the surface were in the oxidized states. After removing a part of the film by sputtering with Ar+ ions, Mo carbide state was studied by XPS. The reflectivity measurements showed the dependence of the thickness of the deposited film on the optical properties of the mirror: a thinner film on the Mo mirrors results in an identical reduction in reflectivity as that seen on the exposed Rh mirror.
    Original languageEnglish
    Pages (from-to)S1187-S1191
    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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