Synchrotron radiation from a charge moving along a helix around a dielectric cylinder

Abstract

In this paper we investigate the radiation emitted by a charged particle moving along a helical orbit around a dielectric cylinder immersed into a homogeneous medium. Formulae are derived for the electromagnetic potentials, electric and magnetic fields, and for the spectral-angular distribution of the radiation in the exterior medium. It is shown that under the Cherenkov condition for dielectric permittivity of the cylinder and the velocity of the particle image on the cylinder surface, strong narrow peaks appear in the angular distribution for the number of quanta radiated on a given harmonic. At these peaks the radiated energy exceeds the corresponding quantity for a homogeneous medium by several dozens of times. Simple analytic estimates are given for the heights and widths of these peaks. The results of numerical calculations for the angular distribution of the radiated quanta are presented and they are compared with the corresponding quantities for the radiation from a charge moving along a helical trajectory inside a dielectric cylinder.

14 pages, 2 figures

References in corpus (2)

• Electromagnetic field generated by a charge moving along a helical orbit inside a dielectric cylinder
• On features of the radiation from an electron moving along a helix inside a cylindrical hole in a homogeneous dielectric

Cited by in corpus (4)

• Quasidiscrete spectrum Cherenkov radiation by a charge moving inside a dielectric waveguide
• Surface polariton excitation and energy losses by a charged particle in cylindrical waveguides
• Coherent radiation from a chain of charged particles on a circular orbit around a dielectric ball
• Radiation processes in dielectric cylindrical waveguides