Mode selection in an S-band relativistic backward wave oscillator based on a coaxial waveguide

E. M. Totmeninov, Alexey Ivanovich Klimov, V. Yu Konev, I. V. Pegel, V. V. Rostov, R. V. Tsygankov, V. P. Tarakanov

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The competition of oscillations in a relativistic backward wave oscillator (RBWO) based on a coaxial waveguide has been studied by theoretical and experimental methods. It is established that the starting current for asymmetric magnetic TEm1 type waves is lower than that for the TEM wave. Predominant excitation of the former waves is confirmed by numerical simulations using the PIC-code KARAT. In an experimental RBWO prototype, the excitation of asymmetric oscillations was suppressed by longitudinal cuts in the central conductor of the coaxial waveguide. As a result, stable generation of the TEM wave has been achieved at a frequency of 1.23 GHz, a peak power of 260 MW, and a 28% efficiency of electron-beam-power conversion into radiation power for a microwave-pulse duration of 33 ns.

Original languageEnglish
Pages (from-to)152-156
Number of pages5
JournalTechnical Physics Letters
Volume40
Issue number2
DOIs
Publication statusPublished - 1 Jan 2014

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backward waves
S band
oscillators
waveguides
oscillations
transmission electron microscopy
excitation
pulse duration
conductors
prototypes
electron beams
microwaves
radiation
simulation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Mode selection in an S-band relativistic backward wave oscillator based on a coaxial waveguide. / Totmeninov, E. M.; Klimov, Alexey Ivanovich; Konev, V. Yu; Pegel, I. V.; Rostov, V. V.; Tsygankov, R. V.; Tarakanov, V. P.

In: Technical Physics Letters, Vol. 40, No. 2, 01.01.2014, p. 152-156.

Research output: Contribution to journalArticle

Totmeninov, E. M. ; Klimov, Alexey Ivanovich ; Konev, V. Yu ; Pegel, I. V. ; Rostov, V. V. ; Tsygankov, R. V. ; Tarakanov, V. P. / Mode selection in an S-band relativistic backward wave oscillator based on a coaxial waveguide. In: Technical Physics Letters. 2014 ; Vol. 40, No. 2. pp. 152-156.
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