Speaker
Gor Chalyan
(Yerevan State University)
Description
We investigate the radiation emitted by a circular annular electron beam propagating parallel to the axis of a dielectric cylinder embedded in a homogeneous medium. Expressions are provided for the potentials and the strengths of the electric and magnetic fields inside and outside the cylinder, considering a general dispersion relation for the two media. The energy flux through the plane perpendicular to the waveguide axis is evaluated. It is shown that in the medium with negative dielectric permittivity the direction of the energy flux is opposite to the direction of the beam motion. Numerical results are provided for the spectral distribution of the energy flux, using the Drude model for dielectric response.
Authors
Prof.
Aram Saharian
(Yerevan State University)
Gor Chalyan
(Yerevan State University)
Mr
Shant Sargsyan
