Instability of a tubular electron beam moving over a dielectric cylinder
- Authors: Averkov Y.O.1, Prokopenko Y.V.1, Yakovenko V.M.1
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Affiliations:
- Usikov Institute of Radio Physics and Electronics
- Issue: Vol 62, No 10 (2017)
- Pages: 1578-1584
- Section: Physical Electronics
- URL: https://journals.rcsi.science/1063-7842/article/view/200160
- DOI: https://doi.org/10.1134/S1063784217100061
- ID: 200160
Cite item
Abstract
The mechanism of interactions between the eigenwaves of a dielectric cylinder and a nonrelativistic tubular electron beam moving over its surface has been considered theoretically. A dispersion relation for the coupled waves of beam electrons and the dielectric cylinder has been derived. The conditions for coupled wave instability have been formulated and an expression for instability increments has been found. It follows from the dispersion relation and the expression for the increments that electric waves with high azimuthal indices are excited most effectively at a narrow gap between the beam and cylinder.
About the authors
Yu. O. Averkov
Usikov Institute of Radio Physics and Electronics
Author for correspondence.
Email: yuriyaverkov@gmail.com
Ukraine, ul. Akademika Proskura 12, Kharkov, 61085
Yu. V. Prokopenko
Usikov Institute of Radio Physics and Electronics
Email: yuriyaverkov@gmail.com
Ukraine, ul. Akademika Proskura 12, Kharkov, 61085
V. M. Yakovenko
Usikov Institute of Radio Physics and Electronics
Email: yuriyaverkov@gmail.com
Ukraine, ul. Akademika Proskura 12, Kharkov, 61085