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Radial control of the tokamak current is of primary importance for sawtooth stabilisation and access to the second stability regime. In this work an extensive theoretical study of the current drive process by simultaneous injection of electron-cyclotron (EC) and LH waves in Tore Supra is presented. Top launching of EC waves of frequency 110 GHz is considered for frequencies both above and below the EC frequency. The EC wave damping along the ray trajectories is computed using a toroidal ray-tracing code, incorporating the evaluation of the relativistic dielectric tensor for an arbitrary electron distribution such as the LH-driven electron tail. This is determined by means of a 3-D bounce-averaged Fokker-Planck code.

Additional information

Authors: GIRUZZI G, CEA, CEN, Cadarache, Saint-Paul-lez-Durance (FR);FIDONE I, CEA, CEN, Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: 16th European Conference on Controlled Fusion and Plasma Physics, Venezia (IT), March 13-17, 1989
Availability: Available from (1) as Paper EN 35092 ORA
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