Design and Simulation of a 0.2-THz Traveling-Wave Tube with Sheet Electron Beam Focused by Reversal Magnetic Field

We study a 0.2-THz traveling-wave tube (TWT) with a grating slow-wave structure (SWS) and sheet electron beam focused by reversal magnetic field. Change in the direction of the guiding magnetic field causes change in the direction of beam curling and can suppress the diocotron instability, which is...

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Bibliographic Details
Main Authors: Ryskin, Nikita M., Rozhnev, Andrey G., Ploskih, Andrey E., Torgashov, Roman A., Titov, Vladimir N., Burtsev, Anton A., Navrotsky, Igor A., Danilushkin, Aleksei V.
Format: Conference Proceeding
Language:English
Subjects:
Earth Observing System
Electron beams
Electron tubes
Focusing
Gain
Magnetic fields
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Summary:We study a 0.2-THz traveling-wave tube (TWT) with a grating slow-wave structure (SWS) and sheet electron beam focused by reversal magnetic field. Change in the direction of the guiding magnetic field causes change in the direction of beam curling and can suppress the diocotron instability, which is a main problem for sheet beam focusing. Electron gun with a converging sheet beam is designed and fabricated. Over 100 mA current was measured. The results of small-signal and large-signal TWT gain analysis are presented.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz.2019.8873758