Tunable Multi-Frequency Radiation Source Based on Gyrotron With Pre-Modulated Beam

We propose a multi-frequency radiation source based on a gyrotron which is driven by a pre-modulated electron beam. Modulation occurs in an additional cavity powered by an external weak monochromatic signal with a frequency outside the gyrotron locking band. Using parameters of a 170 GHz MW-level gy...

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Bibliographic Details
Published in:IEEE electron device letters 2022-05, Vol.43 (5), p.809-812
Main Authors: Guznov, Yu. M., Leontyev, A. N., Rozental, R. M., Sergeev, A. S., Zotova, I. V., Ginzburg, N. S.
Format: Article
Language:English
Subjects:
Cathodes
Cyclotron frequency
Cyclotron resonance devices
Cyclotrons
Electron beams
Extremely high frequencies
Frequency modulation
Frequency ranges
gyroklystron
gyrotron
Gyrotrons
Klystrons
Locking
Mathematical models
Modulation
Multi-frequency radiation
Plasma waves
Radiation
Radiation sources
Self excitation
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Summary:We propose a multi-frequency radiation source based on a gyrotron which is driven by a pre-modulated electron beam. Modulation occurs in an additional cavity powered by an external weak monochromatic signal with a frequency outside the gyrotron locking band. Using parameters of a 170 GHz MW-level gyrotron as an example, we demonstrate in simulations that an external power of only 0.05-0.2% of the power of free-running generation is sufficient to provide beats regimes with controllable 15-25 MHz interval between main practically equal spectral components. The proposed radiation source is suitable for excitation of plasma waves in the ion-cyclotron frequency range. Theoretical considerations are confirmed in proof-of-principle experiments based on a Ka-band relativistic gyroklystron operating in the self-excitation mode and controlled by the input wave.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2022.3163153