Relativistic Second-Harmonic Gyrotron With a Selective Quasi-Regular Cavity

A typical problem of gyrotrons operating at the second harmonic of the electron cyclotron frequency is the suppression of parasitic near-cutoff waves excited at the fundamental harmonic. In this paper, we discuss the possibility for the selective excitation of two different second-harmonic waves in...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2016-12, Vol.63 (12), p.4968-4974
Main Authors: Kalynov, Yuriy K., Osharin, Ivan V., Savilov, Andrey V., Zavolsky, Nikolai A.
Format: Article
Language:English
Subjects:
Cavity resonators
Cyclotron frequency
Cyclotron resonance devices
Cyclotrons
Electron beams
Frequency conversion
Gyrotrons
Harmonic analysis
High cyclotron harmonic operation
Mathematical model
mode selectivity
Relativistic effects
relativistic gyrotron
Second harmonic generation
Selectivity
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Summary:A typical problem of gyrotrons operating at the second harmonic of the electron cyclotron frequency is the suppression of parasitic near-cutoff waves excited at the fundamental harmonic. In this paper, we discuss the possibility for the selective excitation of two different second-harmonic waves in a relativistic millimeter-wavelength gyrotron by means of the use of a method for a significant improvement of the selectivity of this system. This method is based on the use of a quasi-regular cavity with a short irregularity providing different effects on the interaction of the electron beam with the operating second-harmonic wave and the spurious fundamental-harmonic wave.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2016.2618999