Starting currents of modes in cylindrical cavities with mode-converting corrugations for second-harmonic gyrotrons

A self-consistent system of equations (known as single-mode gyrotron equations) is extended to describe the beam-wave interaction in a cylindrical gyrotron cavity with mode-converting longitudinal corrugations, which produce coupling of azimuthal basis modes. The system of equations is applied to in...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2021-03, Vol.42 (3), p.260-274
Main Authors: Tkachova, Tetiana I., Shcherbinin, Vitalii I., Tkachenko, Viktor I., Ioannidis, Zisis C., Thumm, Manfred, Jelonnek, John
Format: Article
Language:English
Subjects:
Classical Electrodynamics
Conversion
Coupling coefficients
Cyclotron resonance devices
Cylindrical waves
Eigenvalues
Electrical Engineering
Electronics and Microelectronics
Engineering
Holes
Instrumentation
Mathematical analysis
Selectivity
Wave interaction
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Summary:A self-consistent system of equations (known as single-mode gyrotron equations) is extended to describe the beam-wave interaction in a cylindrical gyrotron cavity with mode-converting longitudinal corrugations, which produce coupling of azimuthal basis modes. The system of equations is applied to investigate the effect of corrugations on starting currents of the cavity modes. For these modes, eigenvalues, ohmic losses, field structure, and beam-wave coupling coefficients are investigated with respect to the corrugation parameters. It is shown that properly sized mode-converting corrugations are capable of improving the selectivity properties of cylindrical cavities for second-harmonic gyrotrons.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-021-00772-z