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

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

doi:10.1063/5.0004462

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

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

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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.

Original language	English (US)
Article number	0004462
Journal	Physics of Plasmas
Volume	27
Issue number	5
DOIs	https://doi.org/10.1063/5.0004462
State	Published - May 1 2020

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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Langenberg, A., Wegner, T., 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. (2020). Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X. Physics of Plasmas, 27(5), Article 0004462. https://doi.org/10.1063/5.0004462

@article{ac69ba19a6954ba8af89cf8e39de4a11,

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

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.",

author = "A. Langenberg and Th Wegner and Pablant, \{N. A.\} and O. Marchuk and B. Geiger and N. Tamura and R. Bussiahn and M. Kubkowska and A. Moll{\'e}n and P. Traverso and Smith, \{H. M.\} and G. Fuchert and S. Bozhenkov and H. Damm and E. Pasch and Brunner, \{K. J.\} and J. Knauer and M. Beurskens and R. Burhenn and Wolf, \{R. C.\}",

note = "Publisher Copyright: {\textcopyright} 2020 Author(s).",

year = "2020",

month = may,

day = "1",

doi = "10.1063/5.0004462",

language = "English (US)",

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Langenberg, A, Wegner, T, Pablant, NA, Marchuk, O, Geiger, B, Tamura, N, Bussiahn, R, Kubkowska, M, Mollén, A, Traverso, P, Smith, HM, Fuchert, G, Bozhenkov, S, Damm, H, Pasch, E, Brunner, KJ, Knauer, J, Beurskens, M, Burhenn, R & Wolf, RC 2020, 'Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X', Physics of Plasmas, vol. 27, no. 5, 0004462. https://doi.org/10.1063/5.0004462

TY - JOUR

T1 - Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X

AU - Langenberg, A.

AU - Wegner, Th

AU - Pablant, N. A.

AU - Marchuk, O.

AU - Geiger, B.

AU - Tamura, N.

AU - Bussiahn, R.

AU - Kubkowska, M.

AU - Mollén, A.

AU - Traverso, P.

AU - Smith, H. M.

AU - Fuchert, G.

AU - Bozhenkov, S.

AU - Damm, H.

AU - Pasch, E.

AU - Brunner, K. J.

AU - Knauer, J.

AU - Beurskens, M.

AU - Burhenn, R.

AU - Wolf, R. C.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - 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.

AB - 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.

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DO - 10.1063/5.0004462

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AN - SCOPUS:85087445776

SN - 1070-664X

VL - 27

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

M1 - 0004462

ER -

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

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