Journal
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
Volume -, Issue -, Pages -Publisher
IEEE
DOI: 10.1109/IRMMW-THZ46771.2020.9370405
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Funding
- Russian Science Foundation [19-12-00141]
- Russian Science Foundation [19-12-00141] Funding Source: Russian Science Foundation
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The results of theoretical and experimental studies of simultaneous gyrotron operation at several cyclotron harmonics are presented. Based on numerical simulations we consider possible effects in the beam-wave interaction which can be responsible for the nonlinear excitation of a parasitic fundamental-harmonic mode in a second-harmonic gyrotron. Contrariwise, we determine optimal conditions for efficient 2nd harmonic generation which can accompany the radiation at a fundamental one due to frequency multiplication. Results of numerical simulations are in a good agreement with experiments in which 2nd harmonic radiation power of 80 mW was obtained in a 0.263 THz gyrotron.
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