Wave launcher heating studies in the ion cyclotron frequency range. Progress report

Technical Report · Fri Aug 01 00:00:00 EDT 1986

OSTI ID:5272062

Scharer, J E

This progress report discusses our work on the analysis, design, fabrication and laboratory measurements on ion cyclotron frequency range (ICRF) waveguide launchers. We have developed a computer code to solve for the surface impedance for a fast ICRF wave emanating from a dielectric filled guide in the presence of a divertor H-mode or L-mode plasma edge density profile. The H-mode with a density pedestal causes an increased, although tolerable wave reflection from the plasma. We have also formulated a computer code to analyze both vacuum ridged and folded-guide launchers. We have published work on scattering matrix formalism and developed a computer code to determine the coax probe size and distance to a sliding short to match the incident coax wave to the outgoing plasma ICRF wave emanating from the guide for general plasma impedances. We have made detailed measurements on a fabricated waveguide launcher for the cases of both air and de-ionized, distilled water-filled guides. The coax to waveguide transition for the matched water-filled dielectric guide case has a minimum power reflection coefficient of 6.3% at 90.8 MHz. We have also begun to consider coupling from ion Bernstein wave, folded and ridged vacuum-filled waveguide launchers.

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Electrical and Computer Engineering
• DOE Contract Number: FG02-86ER52133
• OSTI ID: 5272062
• Report Number(s): DOE/ER/52133-1; ON: DE86015798
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

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