Long-term erosion and deposition studies of the main graphite limiter in TEXTOR

A. Kreter, A. Kirschner, P. Wienhold, Jari Likonen, M. Mayer, V. Philipps, U. Samm, G. Sergienko

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.
Original languageEnglish
Pages (from-to)35-39
JournalPhysica Scripta
VolumeT128
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Fingerprint

Limiter
Graphite
tiles
Erosion
Tile
erosion
graphite
markers
Incidence
incidence
Profilometry
Angle
secondary ion mass spectrometry
dilution
fluence
Plasma
Magnetic Field
Modeling
magnetic fields
ions

Keywords

  • JET
  • plasma
  • fusion energy
  • fusion reactors
  • ITER
  • plasma toroidal confinement
  • divertor tiles

Cite this

Kreter, A., Kirschner, A., Wienhold, P., Likonen, J., Mayer, M., Philipps, V., ... Sergienko, G. (2007). Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. Physica Scripta, T128, 35-39. https://doi.org/10.1088/0031-8949/2007/T128/007
Kreter, A. ; Kirschner, A. ; Wienhold, P. ; Likonen, Jari ; Mayer, M. ; Philipps, V. ; Samm, U. ; Sergienko, G. / Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. In: Physica Scripta. 2007 ; Vol. T128. pp. 35-39.
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abstract = "Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.",
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Kreter, A, Kirschner, A, Wienhold, P, Likonen, J, Mayer, M, Philipps, V, Samm, U & Sergienko, G 2007, 'Long-term erosion and deposition studies of the main graphite limiter in TEXTOR', Physica Scripta, vol. T128, pp. 35-39. https://doi.org/10.1088/0031-8949/2007/T128/007

Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. / Kreter, A.; Kirschner, A.; Wienhold, P.; Likonen, Jari; Mayer, M.; Philipps, V.; Samm, U.; Sergienko, G.

In: Physica Scripta, Vol. T128, 2007, p. 35-39.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Long-term erosion and deposition studies of the main graphite limiter in TEXTOR

AU - Kreter, A.

AU - Kirschner, A.

AU - Wienhold, P.

AU - Likonen, Jari

AU - Mayer, M.

AU - Philipps, V.

AU - Samm, U.

AU - Sergienko, G.

PY - 2007

Y1 - 2007

N2 - Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.

AB - Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.

KW - JET

KW - plasma

KW - fusion energy

KW - fusion reactors

KW - ITER

KW - plasma toroidal confinement

KW - divertor tiles

U2 - 10.1088/0031-8949/2007/T128/007

DO - 10.1088/0031-8949/2007/T128/007

M3 - Article

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EP - 39

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

ER -