Updates on a W-band Gyro-BWO using a helically corrugated waveguide experiment

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The experimental demonstration of a W-band gyrotron backward-wave oscillator (gyro-BWO) using both thermionic cusp electron gun and helically corrugated waveguide will be presented. The cusp gun is designed to generate an axis-encircling electron beam of 1.5 A at 40 kV with an adjustable velocity ratio of up to 3.0. The beam had a simulated axial velocity spread (Δvz/vz) of ~8% and alpha spread (Δ α /α) of ~10%. The beam had an averaged radius of 0.35 mm and beam thickness of 0.05 mm which is ideal to drive sub-mm wave gyro-devices under investigation. The gyro-BWO has been experimentally measured and the latest results will be presented.
Original languageEnglish
Title of host publication2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC)
Pages217 - 218
Number of pages2
ISBN (Print)978-1-4673-0188-6
Publication statusPublished - 24 Apr 2012
Event2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC) - Monterey,CA, United States
Duration: 24 Apr 201226 Apr 2012


Conference2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC)
Country/TerritoryUnited States


  • electron beams
  • backward wave oscillators
  • helical waveguides
  • thermionic emission

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