Experimental demonstration of a W-band gyro-BWO using a helically corrugated waveguide

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The experimental demonstration of a gyrotron backward wave oscillator (gyro-BWO) using a cusp electron gun and helically corrugated waveguide will be presented. Operating in the W-band frequency range the gyro-BWO is predicted to output similar to 10kW with a frequency tuning range of 85-104 GHz at 18% electronic efficiency before the energy recovery. The annular axis-encircling electron beam has been experimentally measured to show a 1.5 A, 40 kV beam with velocity ratio up to 1.56 at 1.65 T. Preliminary microwave radiation has been measured over a frequency range of 92 to 100 GHz.
Original languageEnglish
Number of pages3
Publication statusPublished - 2010
Event35th International Conference on Infrared, Millimeter and Terahertz Waves - Rome, Italy
Duration: 5 Sep 201010 Sep 2010


Conference35th International Conference on Infrared, Millimeter and Terahertz Waves


  • velocity-spread
  • TWT
  • beams
  • design
  • cusp
  • amplifier
  • backward wave oscillators
  • helical waveguides
  • gyrotrons
  • electron guns

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