Radiation of arbitrary moving charge in an absorbing medium

Abstract

The radiation produced by an arbitrary moving relativistic charge in an absorbing medium is considered in terms of the radiation energy loss. The energy-angle distributions of emitted photons for Cerenkov radiation, prompt and magnetic bremsstrahlung, uniform motion over finite distance (the Tamm problem), and for simple cases of periodic motion are derived. The Doppler effect in absorbing medium for undulator-like motion is considered. The high-energy, low-angle approximation of the spectra is discussed in terms of the complex formation zone of the radiation produced by an ultra-relativistic charge in an absorbing medium.