Role of rotation in tokamak internal transport barriers

G. M. Staebler; R. E. Waltz; J. C. Wiley

doi:10.1088/0029-5515/37/3/I01

Role of rotation in tokamak internal transport barriers

G. M. Staebler, R. E. Waltz, J. C. Wiley

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60 Scopus citations

Abstract

Internal transport barriers have been observed in several tokamak operating regimes and the reduced transport has been shown to be qualitatively consistent with E × B rotational shear suppression of turbulence. The interaction of the toroidal rotation with the diamagnetic and poloidal rotation contributions of the electric field is explored. Toroidal momentum injection counter to the current is predicted to lower the power threshold for improved confinement if the thermal ion density is peaked on-axis. Peaking of the density or power deposition profile near the magnetic axis is also found to lower the power threshold, in agreement with experimental trends.

Original language	English
Pages (from-to)	287-291
Number of pages	5
Journal	Nuclear Fusion
Volume	37
Issue number	3
DOIs	https://doi.org/10.1088/0029-5515/37/3/I01
State	Published - Mar 1997
Externally published	Yes

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abstract = "Internal transport barriers have been observed in several tokamak operating regimes and the reduced transport has been shown to be qualitatively consistent with E × B rotational shear suppression of turbulence. The interaction of the toroidal rotation with the diamagnetic and poloidal rotation contributions of the electric field is explored. Toroidal momentum injection counter to the current is predicted to lower the power threshold for improved confinement if the thermal ion density is peaked on-axis. Peaking of the density or power deposition profile near the magnetic axis is also found to lower the power threshold, in agreement with experimental trends.",

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AU - Waltz, R. E.

AU - Wiley, J. C.

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N2 - Internal transport barriers have been observed in several tokamak operating regimes and the reduced transport has been shown to be qualitatively consistent with E × B rotational shear suppression of turbulence. The interaction of the toroidal rotation with the diamagnetic and poloidal rotation contributions of the electric field is explored. Toroidal momentum injection counter to the current is predicted to lower the power threshold for improved confinement if the thermal ion density is peaked on-axis. Peaking of the density or power deposition profile near the magnetic axis is also found to lower the power threshold, in agreement with experimental trends.

AB - Internal transport barriers have been observed in several tokamak operating regimes and the reduced transport has been shown to be qualitatively consistent with E × B rotational shear suppression of turbulence. The interaction of the toroidal rotation with the diamagnetic and poloidal rotation contributions of the electric field is explored. Toroidal momentum injection counter to the current is predicted to lower the power threshold for improved confinement if the thermal ion density is peaked on-axis. Peaking of the density or power deposition profile near the magnetic axis is also found to lower the power threshold, in agreement with experimental trends.

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DO - 10.1088/0029-5515/37/3/I01

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VL - 37

SP - 287

EP - 291

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 3

ER -

Role of rotation in tokamak internal transport barriers

Abstract

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