High power microwave transmission systems for electron cyclotron resonance plasma heating: Volume IV, Progress report, September 1, 1988--August 31, 1989

Technical Report · Tue Aug 01 00:00:00 EDT 1989

OSTI ID:5723211

Vernon, R J

This progress report is for the fourth year of a grant from the US Department of Energy for the design, development, and fabrication of ECRF transmission and mode conversion systems to transport microwave power from a gyrotron to a magnetically confined plasma. The development and testing of new and improved components for such systems and underlying theory, where necessary, is the focus of this project. Devising and improving component testing and diagnostic techniques is also an important part of this effort. During the last year, we developed a preliminary design for a Te/sub 15,2/--TE/sub 15, 1/ mode converter for the MIT 150 GHz gyrotron and considered its performance as the frequency and mode was step tuned. A preliminary design for a combined uptaper and TE/sub 15,2/--TE/sub 15,1/ converter for possible use with the Varian 140 GHz gyrotron was also developed. Work was begun on a combined TE/sub 15,n/ uptaper -- mode converter to produce a mode combination which would reduce microwave radiation into an azimuthal waveguide gap. Simple models for the radiation from TE/sub 0n/ and TM/sub 0n/ Vlasov launcher baffles were developed and compared with measurements which were taken in our radiation pattern measurement facility. Work began on testing possible methods for generating high azimuthal index rotating modes. Work on the further refinement of the method of mode content determination from open-end radiation pattern measurement was carried out. An investigation of the Wiener-Hopf method for obtaining open- end radiation patterns produced improved radiation patterns for the TE/sub 0n/ modes in a circular waveguide. 15 refs., 15 figs.

• Research Organization: Wisconsin Univ., Madison, WI (USA). Dept. of Electrical and Computer Engineering
• DOE Contract Number: FG02-85ER52122
• OSTI ID: 5723211
• Report Number(s): DOE/ER/52122-4; ON: DE89017314
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
MICROWAVE AMPLIFIERS
DESIGN
ECR HEATING
MICROWAVE POWER TRANSMISSION
PLASMA DIAGNOSTICS
POWER SYSTEMS
PROGRESS REPORT
WAVEGUIDES
AMPLIFIERS
DOCUMENT TYPES
ELECTRONIC EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
MICROWAVE EQUIPMENT
PLASMA HEATING
POWER TRANSMISSION
700205* - Fusion Power Plant Technology- Fuel
Heating
& Injection Systems