Interaction a tube beam of charged particles with a dispersive medium of cylindrical configuration

The interaction between a tubular beam of charged particles and a dispersive medium of cylindrical configuration has been investigated. This medium may have negative permittivity and negative permeability simultaneously over a certain frequency range. The dispersion equation for the eigenmodes spect...

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Bibliographic Details
Main Authors: Averkov, Yu. O., Prokopenko, Yu. V., Yakovenko, V. M.
Format: Conference Proceeding
Language:English
Subjects:
anomalous Doppler effect
beam instability
Cherenkov effect
electron beam
instability increment
left-handed material
Sturrock rules
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Summary:The interaction between a tubular beam of charged particles and a dispersive medium of cylindrical configuration has been investigated. This medium may have negative permittivity and negative permeability simultaneously over a certain frequency range. The dispersion equation for the eigenmodes spectra of a medium and the coupled modes spectra of the system have been derived and numerically analyzed. It has been found that the absolute beam instability of bulk-surface waves occurs because of peculiarities of the eigenmodes spectra of a left-handed metamaterial. The resonant frequency behavior of the permeability causes the emergence of the sections of dispersion curves with anomalous dispersion. The obtained results allow us to propose the left-handed metamaterial as the delaying medium in oscillators of electromagnetic radiation without a need to provide an additional feedback in the system.
ISSN:2165-3593
DOI:10.1109/DIPED.2017.8100581