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

Abstract

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.

Authors:
Publication Date:
Research Org.:
Wisconsin Univ., Madison (USA). Dept. of Electrical and Computer Engineering
OSTI Identifier:
5272062
Report Number(s):
DOE/ER/52133-1
ON: DE86015798
DOE Contract Number:  
FG02-86ER52133
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICR HEATING; MICROWAVE EQUIPMENT; ANTENNAS; COMPUTER CALCULATIONS; DESIGN; FABRICATION; WAVEGUIDES; ELECTRICAL EQUIPMENT; ELECTRONIC EQUIPMENT; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; PLASMA HEATING; 700205* - Fusion Power Plant Technology- Fuel, Heating, & Injection Systems

Citation Formats

Scharer, J E. Wave launcher heating studies in the ion cyclotron frequency range. Progress report. United States: N. p., 1986. Web.
Scharer, J E. Wave launcher heating studies in the ion cyclotron frequency range. Progress report. United States.
Scharer, J E. 1986. "Wave launcher heating studies in the ion cyclotron frequency range. Progress report". United States.
@article{osti_5272062,
title = {Wave launcher heating studies in the ion cyclotron frequency range. Progress report},
author = {Scharer, J E},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5272062}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 1986},
month = {Fri Aug 01 00:00:00 EDT 1986}
}

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