Tungsten erosion in the outer divertor of JET

M. Mayer (Corresponding Author), Jari Likonen, J.P. Coad, H. Maier, M. Balden, S. Lindig, Elizaveta Vainonen-Ahlgren, V. Philipps

Research output: Contribution to journalArticleScientificpeer-review

37 Citations (Scopus)

Abstract

Erosion of tungsten in the outer JET divertor was determined with a set of tungsten coated divertor tiles during the 2001–2004 discharge campaign.
The tungsten marker was strongly eroded, with the largest erosion at the outer strike point position, where more than 75% of the initial W disappeared. Strong erosion is also observed at the outer baffle and horizontal apron of tile 8, where about half of the tungsten has been removed.
These numbers are lower boundaries, because the W was locally completely eroded.
The tungsten erosion is inhomogeneous on a microscopic level and depends on the micro-topography of the rough surface: large erosion with complete disappearance of the W layer is observed on plasma-facing areas of microscopic ridges, while a smaller erosion and sometimes even deposition of carbon is found on the far side of ridges and in pores.
Original languageEnglish
Pages (from-to)101-106
JournalJournal of Nuclear Materials
Volume363-365
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Fingerprint

Tungsten
erosion
Erosion
tungsten
tiles
Tile
ridges
Facings
baffles
markers
Topography
topography
Carbon
porosity
Plasmas
carbon

Keywords

  • ASDEX upgrade
  • erosion
  • plasma
  • JET
  • ITER
  • tungsten
  • divertor
  • fusion energy

Cite this

Mayer, M., Likonen, J., Coad, J. P., Maier, H., Balden, M., Lindig, S., ... Philipps, V. (2007). Tungsten erosion in the outer divertor of JET. Journal of Nuclear Materials, 363-365, 101-106. https://doi.org/10.1016/j.jnucmat.2007.01.010
Mayer, M. ; Likonen, Jari ; Coad, J.P. ; Maier, H. ; Balden, M. ; Lindig, S. ; Vainonen-Ahlgren, Elizaveta ; Philipps, V. / Tungsten erosion in the outer divertor of JET. In: Journal of Nuclear Materials. 2007 ; Vol. 363-365. pp. 101-106.
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abstract = "Erosion of tungsten in the outer JET divertor was determined with a set of tungsten coated divertor tiles during the 2001–2004 discharge campaign. The tungsten marker was strongly eroded, with the largest erosion at the outer strike point position, where more than 75{\%} of the initial W disappeared. Strong erosion is also observed at the outer baffle and horizontal apron of tile 8, where about half of the tungsten has been removed. These numbers are lower boundaries, because the W was locally completely eroded. The tungsten erosion is inhomogeneous on a microscopic level and depends on the micro-topography of the rough surface: large erosion with complete disappearance of the W layer is observed on plasma-facing areas of microscopic ridges, while a smaller erosion and sometimes even deposition of carbon is found on the far side of ridges and in pores.",
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Mayer, M, Likonen, J, Coad, JP, Maier, H, Balden, M, Lindig, S, Vainonen-Ahlgren, E & Philipps, V 2007, 'Tungsten erosion in the outer divertor of JET', Journal of Nuclear Materials, vol. 363-365, pp. 101-106. https://doi.org/10.1016/j.jnucmat.2007.01.010

Tungsten erosion in the outer divertor of JET. / Mayer, M. (Corresponding Author); Likonen, Jari; Coad, J.P.; Maier, H.; Balden, M.; Lindig, S.; Vainonen-Ahlgren, Elizaveta; Philipps, V.

In: Journal of Nuclear Materials, Vol. 363-365, 2007, p. 101-106.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tungsten erosion in the outer divertor of JET

AU - Mayer, M.

AU - Likonen, Jari

AU - Coad, J.P.

AU - Maier, H.

AU - Balden, M.

AU - Lindig, S.

AU - Vainonen-Ahlgren, Elizaveta

AU - Philipps, V.

PY - 2007

Y1 - 2007

N2 - Erosion of tungsten in the outer JET divertor was determined with a set of tungsten coated divertor tiles during the 2001–2004 discharge campaign. The tungsten marker was strongly eroded, with the largest erosion at the outer strike point position, where more than 75% of the initial W disappeared. Strong erosion is also observed at the outer baffle and horizontal apron of tile 8, where about half of the tungsten has been removed. These numbers are lower boundaries, because the W was locally completely eroded. The tungsten erosion is inhomogeneous on a microscopic level and depends on the micro-topography of the rough surface: large erosion with complete disappearance of the W layer is observed on plasma-facing areas of microscopic ridges, while a smaller erosion and sometimes even deposition of carbon is found on the far side of ridges and in pores.

AB - Erosion of tungsten in the outer JET divertor was determined with a set of tungsten coated divertor tiles during the 2001–2004 discharge campaign. The tungsten marker was strongly eroded, with the largest erosion at the outer strike point position, where more than 75% of the initial W disappeared. Strong erosion is also observed at the outer baffle and horizontal apron of tile 8, where about half of the tungsten has been removed. These numbers are lower boundaries, because the W was locally completely eroded. The tungsten erosion is inhomogeneous on a microscopic level and depends on the micro-topography of the rough surface: large erosion with complete disappearance of the W layer is observed on plasma-facing areas of microscopic ridges, while a smaller erosion and sometimes even deposition of carbon is found on the far side of ridges and in pores.

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KW - erosion

KW - plasma

KW - JET

KW - ITER

KW - tungsten

KW - divertor

KW - fusion energy

U2 - 10.1016/j.jnucmat.2007.01.010

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