51. Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X.
- Author
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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., and Wolf, R. C.
- Subjects
PLASMA sheaths ,BLOOD volume ,ATOMIC mass ,ATOMIC charges ,DIFFUSION measurements ,FORECASTING - Abstract
In this paper, 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. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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