Radial transport and electron-cyclotron-current drive in the TCV and DIII-D tokamaks.
Calculation of electron-cyclotron-current drive (ECCD) with the comprehensive CQL3D Fokker-Planck code for a TCV tokamak shot gives 550 kA of driven toroidal current, in marked disagreement with the 100-kA experimental value. Published ECCD efficiencies calculated with CQL3D in the much larger, higher-confinement DIII-D tokamak are in excellent agreement with experiment. The disagreement is resolved by including in the calculations electrostatic-type radial transport at levels given by global energy confinement in tokamaks. The radial transport of energy and toroidal current are in agreement.
Harvey
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General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
Sauter
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Prater
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Nikkola
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