Performances of Rh and Mo mirrors under JET exposure

Laurent Marot; E. Meyer; M. Rubel; D. Ivanova; A. Widdowson; J.P. Coad; Jari Likonen; Antti Hakola; Seppo Koivuranta; G. De Temmerman; JET-EFDA contributors

doi:10.1016/j.jnucmat.2013.01.262

Performances of Rh and Mo mirrors under JET exposure

Laurent 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 contributors

Research output: Contribution to journal › Article › Scientific › peer-review

11 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 language	English
Pages (from-to)	S1187-S1191
Journal	Journal of Nuclear Materials
Volume	438
Issue number	Supplement
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.262
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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10.1016/j.jnucmat.2013.01.262

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title = "Performances of Rh and Mo mirrors under JET exposure",

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 = "Laurent 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 contributors}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.262",

language = "English",

volume = "438",

pages = "S1187--S1191",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "Supplement",

note = "20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, PSI-20 ; Conference date: 21-05-2012 Through 25-05-2012",

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TY - JOUR

T1 - Performances of Rh and Mo mirrors under JET exposure

AU - Marot, Laurent

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 contributors

PY - 2013

Y1 - 2013

N2 - 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.

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.

U2 - 10.1016/j.jnucmat.2013.01.262

DO - 10.1016/j.jnucmat.2013.01.262

M3 - Article

VL - 438

SP - S1187-S1191

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - Supplement

T2 - 20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices

Y2 - 21 May 2012 through 25 May 2012

ER -

Performances of Rh and Mo mirrors under JET exposure

Abstract

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