Radiation from an oscillator uniformly moving along the axis of a dielectric cylinder

Abstract

The radiation generated by a charged longitudinal oscillator moving with a constant drift velocity along the axis of a dielectric cylinder immersed in a homogeneous medium is investigated. For an arbitrary oscillation law a formula is derived for the spectral-angular distribution of this radiation. Under the Cherenkov condition for the dielectric permittivity of the external medium and oscillator drift velocity this formula contains two summands. The first one corresponds to the radiation with a continuous spectrum which propagates at the Cherenkov angle of the external medium. The second one describes the radiation which has a discrete spectrum for a given angle of propagation. The corresponding frequencies are multiples of the Doppler-shifted oscillation frequency. 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 in a homogeneous medium. It is shown that the presence of the cylinder can increase essentially the radiation intensity.

16 pages, 8 EPS figures

Cited by in corpus (7)

• Synchrotron radiation from a charge moving along a helical orbit inside a dielectric cylinder
• Synchrotron radiation from a charge moving along a helix around a dielectric cylinder
• High power Cherenkov radiation from a relativistic particle rotating around a dielectric ball
• Electromagnetic field generated by a charge moving along a helical orbit inside a dielectric cylinder
• Scalar Casimir densities for cylindrically symmetric Robin boundaries
• Electromagnetic field and radiation for a charge moving along a helical trajectory inside a waveguide with dielectric filling
• Radiation processes in dielectric cylindrical waveguides