Tungsten erosion by arcs in ASDEX upgrade

V. Rohde; N. Endstrasser; U. V. Toussaint; M. Balden; T. Lunt; R. Neu; A. Hakola; J. Bucalossi

doi:10.1016/j.jnucmat.2010.11.045

Tungsten erosion by arcs in ASDEX upgrade

V. Rohde
, N. Endstrasser
, U. V. Toussaint
, M. Balden
, T. Lunt
, R. Neu
, A. Hakola
, J. Bucalossi

Max Planck Institute for Plasma Physics
VTT Technical Research Centre of Finland
IRFM, CEA

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ASDEX Upgrade. At the inner divertor baffle region erosion by arcing dominates the physical sputtering by a factor of 7. Whereas the number of arc traces only depends on the position of the tile, the effective erosion strongly depends on the surface resistivity of the PFCs. Video observations with high temporal and spatial resolution correlates the onset of arcing with the appearance of ELMs at the inner divertor baffle.

Original language	English
Pages (from-to)	S46-S50
Journal	Journal of Nuclear Materials
Volume	415
Issue number	1 SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2010.11.045
State	Published - 1 Aug 2011
Externally published	Yes

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10.1016/j.jnucmat.2010.11.045

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title = "Tungsten erosion by arcs in ASDEX upgrade",

abstract = "The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ASDEX Upgrade. At the inner divertor baffle region erosion by arcing dominates the physical sputtering by a factor of 7. Whereas the number of arc traces only depends on the position of the tile, the effective erosion strongly depends on the surface resistivity of the PFCs. Video observations with high temporal and spatial resolution correlates the onset of arcing with the appearance of ELMs at the inner divertor baffle.",

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AU - Rohde, V.

AU - Endstrasser, N.

AU - Toussaint, U. V.

AU - Balden, M.

AU - Lunt, T.

AU - Neu, R.

AU - Hakola, A.

AU - Bucalossi, J.

PY - 2011/8/1

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N2 - The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ASDEX Upgrade. At the inner divertor baffle region erosion by arcing dominates the physical sputtering by a factor of 7. Whereas the number of arc traces only depends on the position of the tile, the effective erosion strongly depends on the surface resistivity of the PFCs. Video observations with high temporal and spatial resolution correlates the onset of arcing with the appearance of ELMs at the inner divertor baffle.

AB - The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ASDEX Upgrade. At the inner divertor baffle region erosion by arcing dominates the physical sputtering by a factor of 7. Whereas the number of arc traces only depends on the position of the tile, the effective erosion strongly depends on the surface resistivity of the PFCs. Video observations with high temporal and spatial resolution correlates the onset of arcing with the appearance of ELMs at the inner divertor baffle.

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VL - 415

SP - S46-S50

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1 SUPPL

ER -

Tungsten erosion by arcs in ASDEX upgrade

Abstract

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