Power deposition profiles during FW-IBW mode conversion on Tore Supra: Measurements and simulations

Details Power deposition profiles during FW-IBW mode conversion on Tore Supra: Measurements and simulations Power deposition profiles during FW-IBW mode conversion on Tore Supra: Measurements and simulations

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..485..136m&link_type=abstract

The thirteenth topical conference on radio frequency power in plasmas. AIP Conference Proceedings, Volume 485, pp. 136-139 (199

Computer Science

1

Theory, Design, And Computerized Simulation, Tokamaks, Spherical Tokamaks, Electromagnetic Waves, Plasma Heating By Particle Beams

Scientific paper

On/off axis peaked electron power deposition profiles were registered on Tore Supra during FW-IBW mode conversion experiments (B0=3.58 T, f=48 MHz, PIC<=2.6 MW) in H+3He plasma with inductively or LHCD driven current (IP=0.8 MA). The profiles were reconstructed using a ``break in slope'' and Fourier decomposition techniques for analysis of the electron temperature behavior, measured by a superheterodyne ECE radiometer. The power directly deposited on electrons within r/a<0.5 region was found to depend on the MC layer position and reached 70% of the injected ICRH power. The power deposition profiles were simulated by several numerical tools including 1D ``VICE'' and 2D ``ALCYON'' full-wave codes and 3D ray-tracing code ``RAYS.'' A new approach of coupling the full-wave and ray-tracing numerical descriptions of FW-IBW mode conversion was proposed, producing the best agreement with the measurements.

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