Organizational Unit:
Fusion Research Center
Fusion Research Center
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.