Long-distance correlation and zonal flow structures induced by mean ExB shear flows in the biasing H-mode at TEXTOR

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3265367· OSTI ID:21274235

Xu, Y; Jachmich, S; Weynants, R R; Schoor, M van; Vergote, M ^[1]; Kraemer-Flecken, A; Schmitz, O; Unterberg, B ^[2]; Hidalgo, C ^[3]

---

1. Laboratoire de Physique des Plasmas, Laboratorium voor Plasmafysica, Association 'Euratom-Belgian State', Ecole Royale Militaire, Koninklijke Militaire School, Trilateral Euregio Cluster, B-1000 Brussels (Belgium)
2. Institute fuer Energieforschung-Plasmaphysik, Forschungszentrum Juelich, Association EURATOM/FZJ, Trilateral Euregio Cluster, D-52425 Juelich (Germany)
3. Laboratorio Nacional de Fusion, Association EURATOM-CIEMAT, 28040 Madrid (Spain)

Long-distance toroidal correlations of potential and density fluctuations have been investigated at the TEXTOR tokamak [H. Soltwisch et al., Plasma Phys. Controlled Fusion 26, 23 (1984)] in edge electrode-biasing experiments. During the biasing-induced H-mode, the dc ExB shear flow triggers a zonal flow structure and hence long-distance correlation in potential fluctuations, whereas for density fluctuations there is nearly no correlation. These results indicate an intimate interaction between the mean and zonal flows, and the significance of long range correlations in improved-confinement regimes.

• OSTI ID: 21274235
• Journal Information: Physics of Plasmas, Vol. 16, Issue 11; Other Information: DOI: 10.1063/1.3265367; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CORRELATIONS
FLUCTUATIONS
H-MODE PLASMA CONFINEMENT
PLASMA DENSITY
TEXTOR TOKAMAK