SIMULATION OF THE EXCITATION OF COAXIAL MODES BY AN ICRH ANTENNA ON A LABORATORY MODEL
A fast magnetosonic wave propagating in a two ion component toroidal plasma at a frequency close to the minority ion cyclotron frequency is either absorbed by the plasma direct as a result of ion cyclotron damping or mode converted to a slow wave which, in turn, is absorbed by electron Landau damping and/or ion cyclotron damping. In a toroidal plasma the occurrence of the one or the other mechanism strongly depends on the value of the poloidal magnetic field if its correct form is taken into account. Energy deposition profiles are numerically evaluated for a plasma of moderate size where the conditions for ray tracing are not satisfied. Finite temperature effects are neglected and some collisional damping has been introduced to avoid the singularities at the mode conversion layers and at the ion cyclotron resonance. The two-dimensional model used takes into account appropriate boundary conditions at the coupling structure and at the wall of the vacuum vessel.
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. I, PP. 343- 350 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA + VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), USD 6
Record Number: 1989124025500 / Last updated on: 1987-01-01
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