Influence of the static dynamic ergodic divertor on edge turbulence properties in TEXTOR

Y. Xu; R. R. Weynants; S. Jachmich; M. Van Schoor; M. Vergote; P. Peleman; M. W. Jakubowski; M. Mitri; D. Reiser; B. Unterberg; K. H. Finken

doi:10.1103/PhysRevLett.97.165003

Influence of the static dynamic ergodic divertor on edge turbulence properties in TEXTOR

Y. Xu, R. R. Weynants, S. Jachmich, M. Van Schoor, M. Vergote, P. Peleman, M. W. Jakubowski, M. Mitri, D. Reiser, B. Unterberg, K. H. Finken

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

Abstract

Systematic measurements on the edge turbulence and turbulent transport have been made by Langmuir probe arrays on TEXTOR under various static Dynamic Ergodic Divertor (DED) configurations. Common features are observed. With the DED, in the ergodic zone the local turbulent flux reverses sign from radially outwards to inwards. The turbulence properties are profoundly modified by energy redistribution in frequency spectra and suppression of large scale eddies. The fluctuation poloidal phase velocity changes direction from electron to ion diamagnetic drift, consistent with the observed reversal of the Er×B flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.

Original language	English
Article number	165003
Journal	Physical Review Letters
Volume	97
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.97.165003
Publication status	Published - 2006

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10.1103/PhysRevLett.97.165003

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title = "Influence of the static dynamic ergodic divertor on edge turbulence properties in TEXTOR",

abstract = "Systematic measurements on the edge turbulence and turbulent transport have been made by Langmuir probe arrays on TEXTOR under various static Dynamic Ergodic Divertor (DED) configurations. Common features are observed. With the DED, in the ergodic zone the local turbulent flux reverses sign from radially outwards to inwards. The turbulence properties are profoundly modified by energy redistribution in frequency spectra and suppression of large scale eddies. The fluctuation poloidal phase velocity changes direction from electron to ion diamagnetic drift, consistent with the observed reversal of the Er×B flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.",

author = "Y. Xu and Weynants, \{R. R.\} and S. Jachmich and \{Van Schoor\}, M. and M. Vergote and P. Peleman and Jakubowski, \{M. W.\} and M. Mitri and D. Reiser and B. Unterberg and Finken, \{K. H.\}",

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doi = "10.1103/PhysRevLett.97.165003",

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volume = "97",

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AU - Xu, Y.

AU - Weynants, R. R.

AU - Jachmich, S.

AU - Van Schoor, M.

AU - Vergote, M.

AU - Peleman, P.

AU - Jakubowski, M. W.

AU - Mitri, M.

AU - Reiser, D.

AU - Unterberg, B.

AU - Finken, K. H.

PY - 2006

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N2 - Systematic measurements on the edge turbulence and turbulent transport have been made by Langmuir probe arrays on TEXTOR under various static Dynamic Ergodic Divertor (DED) configurations. Common features are observed. With the DED, in the ergodic zone the local turbulent flux reverses sign from radially outwards to inwards. The turbulence properties are profoundly modified by energy redistribution in frequency spectra and suppression of large scale eddies. The fluctuation poloidal phase velocity changes direction from electron to ion diamagnetic drift, consistent with the observed reversal of the Er×B flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.

AB - Systematic measurements on the edge turbulence and turbulent transport have been made by Langmuir probe arrays on TEXTOR under various static Dynamic Ergodic Divertor (DED) configurations. Common features are observed. With the DED, in the ergodic zone the local turbulent flux reverses sign from radially outwards to inwards. The turbulence properties are profoundly modified by energy redistribution in frequency spectra and suppression of large scale eddies. The fluctuation poloidal phase velocity changes direction from electron to ion diamagnetic drift, consistent with the observed reversal of the Er×B flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Influence of the static dynamic ergodic divertor on edge turbulence properties in TEXTOR

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