An overmoded 140 GHz, 1 kW quasioptical gyro-TWT with an internal mode converter
Name
Kim-2009-An overmoded 140 GHz, 1 kW quasioptical gyro-TWT with an internal mode converter.pdf
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551.07 KB
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Checksum (MD5)
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Author(s)
Kim, Hae Jin
Joye, Colin D.
Shapiro, Michael
Sirigiri, Jagadishwar R.
Woskov, Paul P.
Maly, Thorsten
Griffin, Robert Guy
Temkin, Richard J
Date Issued
November 2009
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1109/ICIMW.2009.5325762
