EMC3-Eirene simulations of the spatial dependence of the tungsten divertor retention in ASDEX Upgrade

T. Lunt; Y. Feng; K. Krieger; R. Neu; H. W. Müller; E. Wolfrum; M. Willensdorfer; M. Wischmeier

doi:10.1088/0741-3335/53/12/125010

EMC3-Eirene simulations of the spatial dependence of the tungsten divertor retention in ASDEX Upgrade

T. Lunt, Y. Feng, K. Krieger, R. Neu, H. W. Müller, E. Wolfrum, M. Willensdorfer, M. Wischmeier

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

29 Scopus citations

Abstract

The Edge Monte Carlo 3D (EMC3)-Eirene code package is applied to simulate the deuterium plasma and neutral particle as well as the tungsten impurity transport in ASDEX Upgrade. Good agreement is found for the deuterium bulk plasma for an L-mode discharge both in the upstream and downstream profiles. The tungsten concentration in the core is computed for a point source placed at different positions around the outer strike point. Comparing the mean impurity residence time for divertor and main chamber sources yields the divertor retention factor R, which shows a very strong dependence on the location of the source relative to the strike point and also on the discharge parameters. While the tungsten transport is strongly suppressed directly at the strike point, it becomes much more efficient in the region 20-100 mm away from it in the far scrape-off layer.

Original language	English
Article number	125010
Journal	Plasma Physics and Controlled Fusion
Volume	53
Issue number	12
DOIs	https://doi.org/10.1088/0741-3335/53/12/125010
State	Published - Dec 2011
Externally published	Yes

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title = "EMC3-Eirene simulations of the spatial dependence of the tungsten divertor retention in ASDEX Upgrade",

abstract = "The Edge Monte Carlo 3D (EMC3)-Eirene code package is applied to simulate the deuterium plasma and neutral particle as well as the tungsten impurity transport in ASDEX Upgrade. Good agreement is found for the deuterium bulk plasma for an L-mode discharge both in the upstream and downstream profiles. The tungsten concentration in the core is computed for a point source placed at different positions around the outer strike point. Comparing the mean impurity residence time for divertor and main chamber sources yields the divertor retention factor R, which shows a very strong dependence on the location of the source relative to the strike point and also on the discharge parameters. While the tungsten transport is strongly suppressed directly at the strike point, it becomes much more efficient in the region 20-100 mm away from it in the far scrape-off layer.",

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T1 - EMC3-Eirene simulations of the spatial dependence of the tungsten divertor retention in ASDEX Upgrade

AU - Lunt, T.

AU - Feng, Y.

AU - Krieger, K.

AU - Neu, R.

AU - Müller, H. W.

AU - Wolfrum, E.

AU - Willensdorfer, M.

AU - Wischmeier, M.

PY - 2011/12

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AB - The Edge Monte Carlo 3D (EMC3)-Eirene code package is applied to simulate the deuterium plasma and neutral particle as well as the tungsten impurity transport in ASDEX Upgrade. Good agreement is found for the deuterium bulk plasma for an L-mode discharge both in the upstream and downstream profiles. The tungsten concentration in the core is computed for a point source placed at different positions around the outer strike point. Comparing the mean impurity residence time for divertor and main chamber sources yields the divertor retention factor R, which shows a very strong dependence on the location of the source relative to the strike point and also on the discharge parameters. While the tungsten transport is strongly suppressed directly at the strike point, it becomes much more efficient in the region 20-100 mm away from it in the far scrape-off layer.

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EMC3-Eirene simulations of the spatial dependence of the tungsten divertor retention in ASDEX Upgrade

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