Gyrotron with a sectioned cavity based on excitation of a far-from-cutoff operating mode

A typical problem of weakly relativistic low-power gyrotrons (especially in the case of operation at high cyclotron harmonics) is the use of long cavities ensuring extremely high diffraction Q-factors for the operating near-cutoff waves. As a result, a great share of the rf power radiated by electro...

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Veröffentlicht in:Physics of plasmas 2016-01, Vol.23 (1)
Hauptverfasser: Bandurkin, I. V., Kalynov, Yu. K., Osharin, I. V., Savilov, A. V.
Format: Artikel
Sprache:eng
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Zusammenfassung:A typical problem of weakly relativistic low-power gyrotrons (especially in the case of operation at high cyclotron harmonics) is the use of long cavities ensuring extremely high diffraction Q-factors for the operating near-cutoff waves. As a result, a great share of the rf power radiated by electrons is spent in Ohmic losses. In this paper, we propose to use a sectioned cavity with π-shifts of the wave phase between sections. In such a cavity, a far-from-cutoff axial mode of the operating cavity having a decreased diffraction Q-factor is excited by the electron beam in a gyrotron-like regime.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4940784