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The design and simulation of a W-band Gyro-BWO

He, Wenlong and Phelps, Alan and Donaldson, Craig and Cross, Adrian and Ronald, Kevin (2007) The design and simulation of a W-band Gyro-BWO. In: Eighth IEEE international vacuum electronics conference. IEEE International Vacuum Electronics Conference IVEC . IEEE, New York, pp. 231-232. ISBN 9781424406333

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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.