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The design of a 390 GHz gyrotron based on a cusp electron gun

Li, Fengping and He, W. and Phelps, A.D.R. and Cross, A.W. and Donaldson, C. R. and Ronald, K. (2008) The design of a 390 GHz gyrotron based on a cusp electron gun. In: 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008. IEEE, New York, pp. 167-168. ISBN 9781424421190

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The design and simulation of a harmonic gyrotron based on a cusp electron gun is presented. The gyrotron is operated at the 7(th) electron cyclotron harmonic with an output frequency of similar to 390 GHz and mode pattern of TE71. A large orbit electron beam with an energy of 40 keV, beam current of 1.5 A and an adjustable pitch alpha from 1 to 3 from a cusp gun is used to drive the beam-wave interaction. Smooth cylindrical waveguide and slotted structures have been studied as interaction cavities. Theoretical analysis and numerical simulation results of these structures will be presented.