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Performances of Rh and Mo mirrors under JET exposure
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. KTH, School of Electrical Engineering (EES), Centres, Alfvén Laboratory Centre for Space and Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
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2013 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 438, S1187-S1191 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2013. Vol. 438, S1187-S1191 p.
Keyword [en]
Chamber walls, Deposited films, Metallic elements, Optical measurement, Oxidized state, Plasma-facing components, Reflectivity measurements, Surface characterization
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-142574DOI: 10.1016/j.jnucmat.2013.01.262ISI: 000330795300260ScopusID: 2-s2.0-84885472105OAI: diva2:703890
20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), May 21-25, 2012, Aachen, Germany

QC 20140310

Available from: 2014-03-10 Created: 2014-03-07 Last updated: 2014-03-10Bibliographically approved

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Rubel, Marek
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