Abstract
Fast-wave and slow-wave current drive near the mean gyrofrequency were compared in the Irvine Torus. The slow-wave current drive density limit observation was extended by an order of magnitude in wave frequency compared to previous tokamak results. At low densities, the fast-wave antenna was observed to launch slow waves which drove currents that suffered from the current drive density limit identical to waves launched from the slow-wave antenna. At higher densities, current was driven by the fast-wave antenna while none was driven by the slow-wave antenna.
Highlights
Fast-wave and slow-wave current drive near the mean gyrofrequency were compared in the Irvine Torus
The fast-wave antenna was observed to launch slow waves which drove currents that suA'ered from a current-drive density limit identical to that for waves launched from the slow-wave antenna
The new results presented here are the following: (i) Current drive was obtained with the fast-wave antenna at densities demonstrably above the slow-wave density limit. (ii) At low densities, the fast-wave antenna was observed to launch slow waves and these slow waves drove currents which suffered the same current-drive density limit as those launched from the slow-wave antenna. (iii) The slow-wave current-drive density limit was extended an order of magnitude in wave frequency over previous experiments
Summary
Follow this and additional works at: https://digital.sandiego.edu/phys-faculty Part of the Physics Commons. S.; and Edrich, D., "Fast-wave Current Drive above the Slow-Wave Density Limit" (1990). Physics and Biophysics: Faculty Scholarship. 7. https://digital.sandiego.edu/phys-faculty/7
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