Abstract
Corrugated waveguide transmission lines are in use to transmit high power mm-wave radiation from gyrotrons to the plasma for electron cyclotron plasma heating in tokamaks such as ITER. The coupling efficiency of the gyrotron output radiation formed as a quasi-Gaussian beam to the waveguide mode is a critical issue. A hyperbolic corrugated horn serves as a converter of the TEM00 Gaussian mode to the HE11 mode of a corrugated waveguide. We report the design of a hyperbolic horn for application in the ITER transmission line at 170 GHz. The theoretical conversion efficiency of the horn is higher than 0.995.
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Acknowledgements
The authors would like to thank John Doane and Robert Olstad of General Atomics for helpful discussions. This research is supported by the US ITER Project managed by Battelle/ORNL.
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Shapiro, M.A., Temkin, R.J. Calculation of a Hyperbolic Corrugated Horn Converting the TEM00 Mode to the HE11 Mode. J Infrared Milli Terahz Waves 32, 283–294 (2011). https://doi.org/10.1007/s10762-010-9687-z
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DOI: https://doi.org/10.1007/s10762-010-9687-z