title: Radial transport and electron-cyclotron-current drive in the TCV and DIII-D tokamaks.
abstract: 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.
authors: General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
authors: R W
authors: RW
authors: Harvey
authors: O
authors: O
authors: Sauter
authors: R
authors: R
authors: Prater
authors: P
authors: P
authors: Nikkola