Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X

Langenberg, A.; Wegner, Th; Pablant, N. A.; Marchuk, O.; Geiger, B.; Tamura, N.; Bussiahn, R.; Kubkowska, M.; Mollén, A.; Traverso, P.; Smith, H. M.; Fuchert, G.; Bozhenkov, S.; Damm, H.; Pasch, E.; Brunner, K. -J.; Knauer, J.; Beurskens, M.; Burhenn, R.; Wolf, R. C.

doi:10.1063/5.0004462

Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X

Journal Article · Fri May 29 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0004462· OSTI ID:1650339

^[1]; ^[1]; ^[2]; ^[3]; Geiger, B. ^[1]; ^[4]; ^[1]; ^[5]; Mollén, A. ^[2]; Traverso, P. ^[2]; Smith, H. M. ^[1]; Fuchert, G. ^[1]; ^[1]; ^[1]; Pasch, E. ^[1]; ^[1]; ^[1]; Beurskens, M. ^[1]; Burhenn, R. ^[1]; ^[1]

Max Planck Inst. für Plasmaphysik, Greifswald (Germany)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Forschungszentrum Juelich (Germany). Inst. fur Energie- und Klimaforschung (IEK)
National Inst. for Fusion Science, Gifu (Japan)
Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland

Here, the plasma volume averaged impurity confinement of selected charge states and impurity species has been characterized for the Stellarator Wendelstein 7-X (W7-X), covering a wide range of atomic charges (Z = 12–44) and atomic masses (M = 28–184). A comparison of the experimental findings to theoretical neoclassical and turbulent transport expectations suggests, aside from/in addition to the neoclassical transport, an additional significant anomalous transport mechanism, which is not inconsistent with the predictions of a turbulence dominated impurity transport and is in agreement with the experimental results from recent transport studies based on the direct measurements of impurity diffusion profiles, performed at W7-X.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: EUROfusion Consortium; Polish Ministry of Science and Higher Education; USDOE

Contributing Organization:: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053.

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1650339

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 27; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X

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