Performances of Rh and Mo mirrors under JET exposure

TitlePerformances of Rh and Mo mirrors under JET exposure
Publication TypeJournal Article
Year of Publication2013
AuthorsL. Marot, E. Meyer, M. Rubel, D. Ivanova, A. Widdowson, J.P Coad, J. Likonen, A. Hakola, S. Koivuranta, G. De Temmerman
JournalJournal of Nuclear Materials
Volume438, Supplement
PaginationS1187 - S1191

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.







Alternate TitleJ. Nucl. Mater.

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