Carbon erosion and a:C-H layer formation at ASDEX Upgrade

V. Rohde (Corresponding Author), M. Mayer, Jari Likonen, R. Neu, T. Pütterich, Elizaveta Vainonen-Ahlgren, ASDEX Upgrade Team

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

During the campaign 2002–2003 a carbon erosion and deposition experiment was performed in the lower divertor of ASDEX Upgrade. A complete divertor cross section with erosion sensitive markers, deposition monitors below the divertor and time resolved measurements by quartz mircobalance monitors (QMB) and Langmuir probes are used. The largest amount of carbon deposition was found at the inner divertor target plates. At the outer divertor, erosion was observed. However, the behaviour at the outer strike point zone is not jet fully understood. The deposition at remote areas is concentrated below the divertor. Neutrals seem to be dominant at the layer formation at remote areas. Additional erosion of deposited layers by ions reduces the layer thickness dramatically at some locations. QMB data show that at the outer divertor, deposition and erosion occur at the same location, depending on the main plasma properties. A parasitic plasma is observed below the divertor.
Original languageEnglish
Pages (from-to)847 - 851
Number of pages5
JournalJournal of Nuclear Materials
Volume337-339
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

erosion
Erosion
Carbon
carbon
Quartz
monitors
Plasmas
Langmuir probes
Time measurement
quartz
Ions
electrostatic probes
markers
time measurement
Experiments
cross sections
ions

Keywords

  • ASDEX upgrade
  • divertor
  • erosion
  • deposition
  • divertor plasma
  • carbon impurities
  • ITER
  • JET
  • fusion energy

Cite this

Rohde, V., Mayer, M., Likonen, J., Neu, R., Pütterich, T., Vainonen-Ahlgren, E., & ASDEX Upgrade Team (2005). Carbon erosion and a:C-H layer formation at ASDEX Upgrade. Journal of Nuclear Materials, 337-339, 847 - 851. https://doi.org/10.1016/j.jnucmat.2004.10.110
Rohde, V. ; Mayer, M. ; Likonen, Jari ; Neu, R. ; Pütterich, T. ; Vainonen-Ahlgren, Elizaveta ; ASDEX Upgrade Team. / Carbon erosion and a:C-H layer formation at ASDEX Upgrade. In: Journal of Nuclear Materials. 2005 ; Vol. 337-339. pp. 847 - 851.
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abstract = "During the campaign 2002–2003 a carbon erosion and deposition experiment was performed in the lower divertor of ASDEX Upgrade. A complete divertor cross section with erosion sensitive markers, deposition monitors below the divertor and time resolved measurements by quartz mircobalance monitors (QMB) and Langmuir probes are used. The largest amount of carbon deposition was found at the inner divertor target plates. At the outer divertor, erosion was observed. However, the behaviour at the outer strike point zone is not jet fully understood. The deposition at remote areas is concentrated below the divertor. Neutrals seem to be dominant at the layer formation at remote areas. Additional erosion of deposited layers by ions reduces the layer thickness dramatically at some locations. QMB data show that at the outer divertor, deposition and erosion occur at the same location, depending on the main plasma properties. A parasitic plasma is observed below the divertor.",
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Rohde, V, Mayer, M, Likonen, J, Neu, R, Pütterich, T, Vainonen-Ahlgren, E & ASDEX Upgrade Team 2005, 'Carbon erosion and a:C-H layer formation at ASDEX Upgrade', Journal of Nuclear Materials, vol. 337-339, pp. 847 - 851. https://doi.org/10.1016/j.jnucmat.2004.10.110

Carbon erosion and a:C-H layer formation at ASDEX Upgrade. / Rohde, V. (Corresponding Author); Mayer, M.; Likonen, Jari; Neu, R.; Pütterich, T.; Vainonen-Ahlgren, Elizaveta; ASDEX Upgrade Team.

In: Journal of Nuclear Materials, Vol. 337-339, 2005, p. 847 - 851.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Carbon erosion and a:C-H layer formation at ASDEX Upgrade

AU - Rohde, V.

AU - Mayer, M.

AU - Likonen, Jari

AU - Neu, R.

AU - Pütterich, T.

AU - Vainonen-Ahlgren, Elizaveta

AU - ASDEX Upgrade Team, null

PY - 2005

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AB - During the campaign 2002–2003 a carbon erosion and deposition experiment was performed in the lower divertor of ASDEX Upgrade. A complete divertor cross section with erosion sensitive markers, deposition monitors below the divertor and time resolved measurements by quartz mircobalance monitors (QMB) and Langmuir probes are used. The largest amount of carbon deposition was found at the inner divertor target plates. At the outer divertor, erosion was observed. However, the behaviour at the outer strike point zone is not jet fully understood. The deposition at remote areas is concentrated below the divertor. Neutrals seem to be dominant at the layer formation at remote areas. Additional erosion of deposited layers by ions reduces the layer thickness dramatically at some locations. QMB data show that at the outer divertor, deposition and erosion occur at the same location, depending on the main plasma properties. A parasitic plasma is observed below the divertor.

KW - ASDEX upgrade

KW - divertor

KW - erosion

KW - deposition

KW - divertor plasma

KW - carbon impurities

KW - ITER

KW - JET

KW - fusion energy

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