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This paper presents the design and simulation of a W-band gyrotron backward wave oscillator (Gyro-BWO) with a helically corrugated waveguide as the beam-wave interaction region and a cusp gun as the electron beam source. The electron beam system and the beam-wave interaction were optimized through numerical simulations for optimized output power and frequency bandwidth. A 3d8 bandwidth of similar to 84-104 GHz and output power similar to 10 kW were achieved using a 40 kV, 1.5 A, pitch alpha 1.6 axis-encircling electron beam from the cusp gun. Furthermore, the W-band helically corrugated interaction region was manufactured with dispersion from 76GHz to 110GHz measured in good agreement with simulations and theory.
|Title of host publication||Eighth IEEE international vacuum electronics conference|
|Place of Publication||New York|
|Publication status||Published - 2007|
|Event||8th IEEE International Vacuum Electronics Conference - Kitakyushu, Japan|
Duration: 15 May 2007 → 17 May 2007
|Name||IEEE International Vacuum Electronics Conference IVEC|
|Conference||8th IEEE International Vacuum Electronics Conference|
|Period||15/05/07 → 17/05/07|
- helically corrugated waveguide
- high power microwave
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