Influence of the Static Dynamic Ergodic Divertor on Edge Turbulence Properties in TEXTOR

Journal Article · Fri Oct 20 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.165003· OSTI ID:20861023

Xu, Y; Weynants, R R; Jachmich, S; Van Schoor, M; Vergote, M ^[1]; Peleman, P ^[2]; Jakubowski, M W; Mitri, M; Reiser, D; Unterberg, B; Finken, K H ^[3]

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1. Laboratoire de Physique des Plasmas-Laboratorium voor Plasmafysica, Association 'Euratom-Belgian State', Ecole Royale Militaire-Koninklijke Militaire School, B-1000 Brussels (Belgium)
2. Department of Applied Physics, Ghent University, B-9000 Ghent (Belgium)
3. Institute fuer Plasmaphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany)

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 E{sub r}xB flow. In the laminar region, the turbulence is found to react to an observed reduced flow shear.

• OSTI ID: 20861023
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIAMAGNETISM
DIVERTORS
ELECTRONS
FLUCTUATIONS
IONS
LANGMUIR PROBE
PHASE VELOCITY
TEXTOR TOKAMAK
TURBULENCE