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

He, Wenlong and Donaldson, Craig and Li, Fengping and Cross, Adrian and Phelps, Alan and Ronald, Kevin (2009) Design, simulation and experiment of a cusp electron beam for millimeter wave gyro-devices. In: IEEE International Vacuum Electronics Conference, 2008, 2008-04-22 - 2008-04-24. (https://doi.org/10.1109/IVELEC.2009.5193453)

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Abstract

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.

ORCID iDs

He, Wenlong ORCID logoORCID: https://orcid.org/0000-0001-7018-0527, Donaldson, Craig ORCID logoORCID: https://orcid.org/0000-0001-6627-2461, Li, Fengping, Cross, Adrian ORCID logoORCID: https://orcid.org/0000-0001-7672-1283, Phelps, Alan ORCID logoORCID: https://orcid.org/0000-0002-1100-1012 and Ronald, Kevin ORCID logoORCID: https://orcid.org/0000-0002-8585-0746;
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