An overmoded 140 GHz, 1 kW quasioptical gyro-TWT with an internal mode converter
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The design and experimental study of a 140 GHz, 1 kW gyro-traveling wave tube (Gyro-TWT) operating in the HE[subscript 06] mode of a confocal waveguide is presented. A combination of quasioptical gain sections with dielectric loaded severs enables high gain operation with mode selectivity. A nanosecond-scale 120 mW pulse driver at 140 GHz was demonstrated. This input driver pulse will be amplified by the Gyro-TWT and the resulting output high-power short pulse will be transmitted to an EPR spectrometer probe. A quasioptical mode converter utilized to transform the higher order operating confocal mode into a Gaussian-like beam was designed and cold tested. The simulated and measured Gaussian beam patterns of the output mode converter are in good agreement.
Date issued
2009-11Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center; Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)Journal
34th International Conference on Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009
Publisher
Institute of Electrical and Electronics Engineers
Citation
Haejin Kim et al. “An overmoded 140 GHz, 1 kW quasioptical gyro-twt with an internal mode converter.” Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on. 2009. 1-2. ©2009 Institute of Electrical and Electronics Engineers
Version: Final published version
Other identifiers
INSPEC Accession Number: 10976655
ISBN
978-1-4244-5416-7