Separatrix-to-Wall Simulations of Impurity Transport with a Fully Three-Dimensional Wall in DIII-D

A novel multi-code workflow to interpret collector probe deposition patterns in DIII-D has been developed. The components of the workflow consist of a detailed computer-aided design (CAD) file of the vessel wall and the scrape-off layer (SOL) codes MAFOT, OSM, DIVIMP and 3DLIM. A special-purpose too...

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Bibliographic Details
Published in:Fusion science and technology 2022-07
Main Authors: Zamperini, Shawn, Abrams, T., Nichols, J. H., Elder, J. D., Duran, J. D., Stangeby, P. C., Donovan, D. C., Rudakov, D. L., Wingen, A., Crowe, C.
Format: Article
Language:English
Subjects:
collector probes
DIII-D
impurity transport
scrape-off layer
SOL
Online Access:Get full text
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Summary:A novel multi-code workflow to interpret collector probe deposition patterns in DIII-D has been developed. The components of the workflow consist of a detailed computer-aided design (CAD) file of the vessel wall and the scrape-off layer (SOL) codes MAFOT, OSM, DIVIMP and 3DLIM. A special-purpose toolkit enables passing the output of these codes between each other to provide a full-SOL picture of impurity transport. A demonstration of the workflow is described to support evidence of near-SOL tungsten parallel accumulation during trace W impurity experiments on DIII-D. Iteration between simulated deposition patterns in 3DLIM and DIVIMP predicts a region of elevated W density near the separatrix about halfway between the outboard midplane and the top of the plasma. Furthermore, this workflow will be used to better interpret collector probe experiments on DIII-D.
ISSN:1536-1055
1943-7641