Performances of Rh and Mo mirrors under JET exposure

L. Marot (Corresponding Author), E. Meyer, M. Rubel, D. Ivanova, A. Widdowson, J.P. Coad, Jari Likonen, Antti Hakola, Seppo Koivuranta, G. De Temmerman, JET-EFDA collaborators

    Research output: Contribution to journalArticleScientificpeer-review

    8 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
    Number of pages5
    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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    Marot, L., Meyer, E., Rubel, M., Ivanova, D., Widdowson, A., Coad, J. P., Likonen, J., Hakola, A., Koivuranta, S., De Temmerman, G., & JET-EFDA collaborators (2013). Performances of Rh and Mo mirrors under JET exposure. Journal of Nuclear Materials, 438(Supplement), S1187-S1191. https://doi.org/10.1016/j.jnucmat.2013.01.262