TITLE

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

AUTHOR(S)
Xu, Y.; Jachmich, S.; Weynants, R. R.; Van Schoor, M.; Vergote, M.; Krämer-Flecken, A.; Schmitz, O.; Unterberg, B.; Hidalgo, C.; TEXTOR Team
PUB. DATE
November 2009
SOURCE
Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p110704
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 E×B 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.
ACCESSION #
45515229

 

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