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

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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

Fingerprint

Mirrors
X ray photoelectron spectroscopy
mirrors
Facings
Rhodium
Molybdenum
Secondary ion mass spectrometry
Sputtering
Carbides
Carbon
Deposits
Optical properties
Ions
Plasmas
Thin films
Scanning electron microscopy
reflectance
rhodium
optical measurement
carbides

Cite this

Marot, L., Meyer, E., Rubel, M., Ivanova, D., Widdowson, A., Coad, J. P., ... 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
Marot, L. ; Meyer, E. ; Rubel, M. ; Ivanova, D. ; Widdowson, A. ; Coad, J.P. ; Likonen, Jari ; Hakola, Antti ; Koivuranta, Seppo ; De Temmerman, G. ; JET-EFDA collaborators. / Performances of Rh and Mo mirrors under JET exposure. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. Supplement. pp. S1187-S1191.
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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.",
author = "L. Marot and E. Meyer and M. Rubel and D. Ivanova and A. Widdowson and J.P. Coad and Jari Likonen and Antti Hakola and Seppo Koivuranta and {De Temmerman}, G. and {JET-EFDA collaborators}",
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Marot, L, Meyer, E, Rubel, M, Ivanova, D, Widdowson, A, Coad, JP, 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, vol. 438, no. Supplement, pp. S1187-S1191. https://doi.org/10.1016/j.jnucmat.2013.01.262

Performances of Rh and Mo mirrors under JET exposure. / Marot, L. (Corresponding Author); Meyer, E.; Rubel, M.; Ivanova, D.; Widdowson, A.; Coad, J.P.; Likonen, Jari; Hakola, Antti; Koivuranta, Seppo; De Temmerman, G.; JET-EFDA collaborators.

In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S1187-S1191.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Marot, L.

AU - Meyer, E.

AU - Rubel, M.

AU - Ivanova, D.

AU - Widdowson, A.

AU - Coad, J.P.

AU - Likonen, Jari

AU - Hakola, Antti

AU - Koivuranta, Seppo

AU - De Temmerman, G.

AU - JET-EFDA collaborators

PY - 2013

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AB - 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.

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Marot L, Meyer E, Rubel M, Ivanova D, Widdowson A, Coad JP et al. Performances of Rh and Mo mirrors under JET exposure. Journal of Nuclear Materials. 2013;438(Supplement):S1187-S1191. https://doi.org/10.1016/j.jnucmat.2013.01.262