NUMERICAL SIMULATION OF LOWER HYBRID HEATING AND CURRENT DRIVE IN TOKAMAKS
This numerical model which is coupled to a 1-D transport code, includes ray tracing, ion stochastic heating and quasi-linear electron Landau damping mechanisms. Losses due to unconfined fast ions are evaluated. The large N-// downshift due to ray tracing prevents accounting for the intense ion heating observed on Petula, leading us to conclude that either ray tracing is inadequate, or the actual input spectrum differs from the theoretical one. A satisfactory simulation of ion heating is obtained under the additional condition to considerably reduce direct electron absorption. The low density current drive experiments made on Petula can be simulated by replacing the exponential term exp(+V**2/2V**2-T) in the Fisch expression by an empirical factor.
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. II, PP. 1319-1326 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA - VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), PRI
Record Number: 1989124038900 / Last updated on: 1987-01-01
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