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Author: Johnson, R. W. × Author: Stacey, Weston M. × End date: 2009 × Start date: 2000 × search.filters.applied.f.resourcesubtype: Pre-print ×

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A neoclassical calculation of toroidal rotation profiles and comparison with DIII-D measurements

2006 , Stacey, Weston M. , Johnson, R. W. , Mandrekas, John

Momentum and particle balance and neoclassical viscosity were applied to calculate the radial profile of toroidal rotation velocity in several DIII-D [J. Luxon, Nucl. Fusion, 42, 614 (2002)] discharges in a variety of energy confinement regimes (Lowmode, Low-mode with Internal Transport Barrier, High-mode, and High-mode with Quiescent Double Barrier). Calculated toroidal rotation velocities generally were found to (over-) predict measured values to well within a factor of 2.

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Calculation of toroidal rotation profiles in DIII-D using neoclassical viscosity (DoE Grant ER54538)

2005-10 , Stacey, Weston M. , Johnson, R. W. , Mandrekas, John

Momentum and particle balance and neoclassical viscosity were applied to calculate the radial profile of toroidal rotation in several DIII-D [J. Luxon, Nucl. Fusion, 42, 614 (2002)] discharges in a variety of energy confinement regimes (Low-mode, Low-mode with Internal Transport Barrier, Highmode, and High-mode with Quiescent Double Barrier). Calculated toroidal rotation velocities were found to over-predict measured values most in the center—by factors of 1.5 to 3--with the over-prediction generally decreasing with increasing radius, for the L, H and ITB mode shots, but the single impurity species approximation could not properly model the multiple Ni and Cu charge states in the QDB shots.

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