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 language | English |
|---|---|
| Pages (from-to) | S1187-S1191 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 438 |
| Issue number | Supplement |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
| Event | 20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany Duration: 21 May 2012 → 25 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