Strong ExB shear flows in the transport-barrier region in H-mode plasma

H. Xia; M. G. Shats; H. Punzmann

doi:10.1103/PhysRevLett.97.255003

Strong ExB shear flows in the transport-barrier region in H-mode plasma

H. Xia^*, M. G. Shats, H. Punzmann

^*Corresponding author for this work

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

20 Citations (Scopus)

Abstract

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.

Original language	English
Article number	255003
Journal	Physical Review Letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.97.255003
Publication status	Published - 2006

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10.1103/PhysRevLett.97.255003

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title = "Strong ExB shear flows in the transport-barrier region in H-mode plasma",

abstract = "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.",

author = "H. Xia and Shats, {M. G.} and H. Punzmann",

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AU - Shats, M. G.

AU - Punzmann, H.

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N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevLett.97.255003

DO - 10.1103/PhysRevLett.97.255003

M3 - Article

SN - 0031-9007

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 255003

ER -

Strong ExB shear flows in the transport-barrier region in H-mode plasma

Abstract

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