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Strong ExB Shear Flows in the Transport-Barrier Region in H-Mode Plasma

Xia, Hua; Shats, Michael; Punzmann, Horst


We report the first experimental observation of stationary zonal flow in the transport-barrier region of the H-mode plasma. Strong peaks in Er shear mark the width of this region. A strong m=n=0 low-frequency (f<0.6kHz) zonal flow is observed in regions of increased Er, suggesting a substantial contribution of zonal flow to the spatial modulation of Er radial profiles. Radial localization of the zonal flow is correlated with a region of zero magnetic shear and low-order (7/5) rational surfaces.

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.97.255003


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