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Design, simulation and experiment of a cusp electron beam for millimeter wave gyro-devices

By: Cross, A.W.; Fengping Li; Donaldson, C.R.; Wenlong He; Phelps, A.D.R.; Whyte, C.G.; Liang Zhang; Robertson, C.W.; Ronald, K.;

2009 / IEEE / 978-1-4244-3500-5

Description

This item was taken from the IEEE Conference ' Design, simulation and experiment of a cusp electron beam for millimeter wave gyro-devices ' The design, simulation and experiment of a thermionic cusp electron gun that is to be used for millimeter wave generation will be presented. A cusp gun uses a non-adiabatic magnetic field reversal to obtain azimuthal motion on an electron beam resulting in an annular shaped, axis-encircling beam. The cusp gun was designed to generate a beam of 1.5A at 40kV with an adjustable velocity ratio of up to 3.0. The beam had a simulated axial velocity spread of 7.4% and alpha spread of 10.1%. The beam had an averaged radius of 0.35mm and beam thickness of 0.05mm which is ideal to drive sub-mm wave gyro-devices under investigation.