Double-beam Gyrotron with Simultaneous Excitation at the 1st and at the 2nd Cyclotron Harmonics

To implement high-power source of dual-frequency continuous wave radiation, we propose a gyrotron with a conventional cylindrical resonator driven by two co-axis polyhelical electron beams, simultaneously exciting two TE modes at the 1 st and 2 nd cyclotron harmonics. On the basis of an analysis of...

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Bibliographic Details
Main Authors: Zheleznov, I. V., Zaslavsky, V. Yu, Leshcheva, K. A., Proyavin, M. D., Sergeev, A. S., Zotova, I. V., Glyavin, M. Yu
Format: Conference Proceeding
Language:English
Subjects:
Electron beams
Gyrotrons
Harmonic analysis
Power system harmonics
Solid modeling
Three-dimensional displays
Time-frequency analysis
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Summary:To implement high-power source of dual-frequency continuous wave radiation, we propose a gyrotron with a conventional cylindrical resonator driven by two co-axis polyhelical electron beams, simultaneously exciting two TE modes at the 1 st and 2 nd cyclotron harmonics. On the basis of an analysis of the mode spectrum and coupling coefficients, we select a pair of modes (TE 5,1 at the 1 st and TE 4,3 at the 2 nd cyclotron harmonics, respectively) which are independently excited by electron beams with different injection radii. Simulations in the frame of an averaged multi-mode time-domain model demonstrate that when these modes are excited by 1 A/30 kV electron beams, it is possible to reach multi-kW power levels of radiation at frequencies of 14.3 and 28 GHz simultaneously. The results obtained are confirmed by 3D PIC (particle-in-cell) simulations.
ISSN:2831-5804
DOI:10.1109/PIERS62282.2024.10618152