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Investigation on the erosion/deposition processes in the ITER-like wall divertor at JET using glow discharge optical emission spectrometry technique
Vise andre og tillknytning
2016 (engelsk)Inngår i: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T167, artikkel-id 014049Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

As a complementary method to Rutherford back scattering (RBS), glow discharge optical emission spectrometry (GDOES) was used to investigate the depth profiles of W, Mo, Be, O and C concentrations into marker coatings (CFC/Mo/W/Mo/W) and the substrate of divertor tiles up to a depth of about 100 μm. A number of 10 samples cored from particular areas of the divertor tiles were analyzed. The results presented in this paper are valid only for those areas and they cannot be extrapolated to the entire tile. Significant deposition of Be was measured on Tile 3 (near to the top), Tile 6 (at about 40 mm from the innermost edge) and especially on Tile 0 (HFGC). Preliminary experiments seem to indicate a penetration of Be through the pores and imperfections of CFC material up to a depth of 100 μm in some cases. No erosion and a thin layer of Be (<1 μm) was detected on Tiles 4, 7 and 8. On Tile 1 no erosion was found at about 1/3 from bottom.

sted, utgiver, år, opplag, sider
Institute of Physics Publishing (IOPP), 2016. Vol. T167, artikkel-id 014049
Emneord [en]
glow discharge optical emision spectrometry, ITER-like wall, tungsten coatings, Backscattering, Coatings, Electric discharges, Erosion, Glow discharges, Light emission, Optical emission spectroscopy, Complementary methods, Divertor tiles, Erosion/deposition, Glow discharge optical emission spectrometries, Rutherford back-scattering, Thin layers, Tungsten coating, Spectrometry
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Identifikatorer
URN: urn:nbn:se:kth:diva-188327DOI: 10.1088/0031-8949/T167/1/014049ISI: 000383504700050Scopus ID: 2-s2.0-84959871097OAI: oai:DiVA.org:kth-188327DiVA, id: diva2:936216
Konferanse
15th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2015, Aix-en-Provence, France, 18 May 2015 through 22 May 2015
Merknad

QC 20161025

Tilgjengelig fra: 2016-06-13 Laget: 2016-06-09 Sist oppdatert: 2017-11-28bibliografisk kontrollert

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