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Telecommunications and Radio Engineering

年間 12 号発行

ISSN 印刷: 0040-2508

ISSN オンライン: 1943-6009

SJR: 0.185 SNIP: 0.268 CiteScore™:: 1.5 H-Index: 22

Indexed in

AXIAL MAGNETIC FIELD EFFECTS IN WAVE AMPLIFICATION IN BEAM-PLASMA SUPERHETERODYNE FREE ELECTRON LASER OF THE DOPPLERTRON TYPE

巻 77, 発行 6, 2018, pp. 513-523
DOI: 10.1615/TelecomRadEng.v77.i6.40
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要約

The research is devoted to the amplification characteristics of beam-plasma superheterodyne free-electron laser of the dopplertron type. The influence of an axial magnetic field on the wave amplification in such a device will be investigated to find the optimal operation mode.
The quasihydrodynamic equation, the continuity equation and Maxwell's equations were used as the initial ones. The motion and continuity problem was solved by means of an updated averaged characteristics approach. The slowly-varying amplitudes method was applied to solve the problem of electromagnetic self-fields excitation.
The influence of the axial guiding magnetic field on the wave dynamics in a plasma-beam superheterodyne free electron laser with dopplertron pumping was analyzed in terms of the cubic nonlinear approximation. It was revealed that the strength of electromagnetic radiation increased with the magnitude of the axial guiding magnetic field becoming critically low. The critical value of magnetic field strength and the saturation levels of electromagnetic waves were found.
The study proved the ability of the free electron laser in question to efficiently amplify electromagnetic radiation in the millimeter wave band.

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