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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimer: 0040-2508
ISSN En ligne: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v55.i4.60
9 pages

Electromagnetic Field Generation by Relativistic Electrons in a Crossed-Field Coaxial Resonator under the Cerenkov Resonance Conditions

Yu. V. Kirichenko
The National Scientific Center, "Kharkiv Institute of Physics and Technology", 1 Akademichna St., 61108 Kharkiv, Ukraine

RÉSUMÉ

A theoretical analysis is given of the possibility of electromagnetic wave generation by relativistic electrons rotating in an axial magnetic and radial electrostatic fields in a cylindrical resonator. The dispersion relation has been derived to describe the wave-electron interaction. It has been shown that the generation is possible under the Cerenkov resonance conditions. In this case the electron speed and the phase velocity of the waves are oriented across the magnetic field. The growth rate of the wave shows maxima as a function of the relativistic factor and the magnetic field strength. This allows selecting an optimum operation mode of the generator. Under certain conditions the growth rate becomes strongly dependent on losses. In some cases the generation is possible only in the presence of losses for absorption in the walls and radiation from the resonator.


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