The transition to the operation of gyrotrons on symmetric TE modes makes it possible to provide relatively small ohmic power losses in the walls of operating cavities. We propose an electrodynamic method that makes it possible to selectively excite TE0,p waves at the first cyclotron harmonic by using cavities with azimuthal nonsymmetry. The presence of resonance azimuthal grooves in a cavity with a close to circular cross section increases the starting current of the most dangerous parasite TE2,p mode, while not affecting the excitation of the operating mode TE0,p. This cavity configuration is also promising for mechanical frequency tuning when operating in a symmetric mode.
REFERENCES
1.
G. S.
Nusinovich
, M. K. A.
Thumm
, and M. I.
Petelin
, “The gyrotron 50: historical overview
,” J. Infrared, Millimeter Terahertz Waves
, vol. 35
, p. 325
(2014
).2.
G.S.
Nusinovich
, D.G.
Kashyn
, T.M.
Antonsen
, “Harmonic gyrotrons operating in high-order symmetric modes
,” Applied Physics Letters
, vol. 106
, p. 013502
(2015
).3.
I.V.
Bandurkin
, A.P.
Fokin
, M.Yu.
Glyavin
, A.G.
Luchinin
, I.V.
Osharin
, A.V.
Savilov
, “Demonstration of a Selective Oversized Cavity in a Terahertz Second-Harmonic Gyrotron
,” IEEE Electron Device Letters
, vol. 41
, no. 9
, pp. 1412
–1415
(2020
).4.
I. V.
Bandurkin
, M. Yu.
Glyavin
, S. V.
Kuzikov
, P. B.
Makhalov
, I. V.
Osharin
, and A. V.
Savilov
, “Method of Providing the High Cyclotron Harmonic Operation Selectivity in a Gyrotron With a Spatially Developed Operating Mode
,” IEEE Trans. Electron Devices
, vol. 64
, no. 9
, pp. 3893
–3897
(2017
).5.
I.V.
Bandurkin
, G.I.
Kalynova
, Yu.K.
Kalynov
, I.V.
Osharin
, A.V.
Savilov
, D.Yu.
Shchegolkov
, “Mode Selective Azimuthally Asymmetric Cavity for Terahertz Gyrotrons
”, IEEE Trans. Electron Devices
, vol. 68
, p. 347
(2021
).
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