Erosion at the inner wall of JET during the discharge campaigns 2001-2009

M. Mayer (Corresponding Author), S. Krat, J.P. Coad, Antti Hakola, Jari Likonen, S. Lindig, A. Widdowson, JET-EFDA collaborators

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.
Original languageEnglish
Pages (from-to)S780-S783
Number of pages4
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

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erosion
Erosion
Limiters
Carbon
carbon
markers
tiles
neutral particles
Tile
charge exchange
Chemical elements
entrances
Ion beams
energy spectra
ion beams
Atoms
collisions
atoms

Cite this

Mayer, M. ; Krat, S. ; Coad, J.P. ; Hakola, Antti ; Likonen, Jari ; Lindig, S. ; Widdowson, A. ; JET-EFDA collaborators. / Erosion at the inner wall of JET during the discharge campaigns 2001-2009. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. Supplement. pp. S780-S783.
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title = "Erosion at the inner wall of JET during the discharge campaigns 2001-2009",
abstract = "The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.",
author = "M. Mayer and S. Krat and J.P. Coad and Antti Hakola and Jari Likonen and S. Lindig and A. Widdowson and {JET-EFDA collaborators}",
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Mayer, M, Krat, S, Coad, JP, Hakola, A, Likonen, J, Lindig, S, Widdowson, A & JET-EFDA collaborators 2013, 'Erosion at the inner wall of JET during the discharge campaigns 2001-2009', Journal of Nuclear Materials, vol. 438, no. Supplement, pp. S780-S783. https://doi.org/10.1016/j.jnucmat.2013.01.167

Erosion at the inner wall of JET during the discharge campaigns 2001-2009. / Mayer, M. (Corresponding Author); Krat, S.; Coad, J.P.; Hakola, Antti; Likonen, Jari; Lindig, S.; Widdowson, A.; JET-EFDA collaborators.

In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S780-S783.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Mayer, M.

AU - Krat, S.

AU - Coad, J.P.

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AU - Likonen, Jari

AU - Lindig, S.

AU - Widdowson, A.

AU - JET-EFDA collaborators

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N2 - The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.

AB - The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.

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