SECOND HARMONIC ION - CYCLOTRON RESONANCE HEATING IN ASDEX - RESULTS OF RAY TRACING CALCULATIONS
First ray tracing computations based on typical ASDEX hydrogen plasma parameters are presented. It is shown that the heating efficiency is already appreciable for ohmically heated discharges, where, depending on density, 10 to 25 % single transit absorption has been calculated. The efficiency strongly increases with electron density and plasma temperature reaching more than 40 % single transit absorption at T-io + z < 3 keV, T-eo + z < 1.5 keV, n-e-0 + z < 5 x 10**13 cm**-3. Well defined power deposition profiles with peak power densities of a few W/cm**3 per MW and of small halfwidth are found to be rather insensitive to typically observed variations of plasma density and temperature profiles. In the temperature range explored so far most wave power is transferred to the plasma ions.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP 4/219, 1984
Record Number: 1989123034500 / Last updated on: 1987-01-01
Available languages: en