Spontaneous Radiation in Relativistic Strophotron
  Spectral intensity of spontaneous radiation is calculated in relativistic strophotron. It is shown, that it in the strophotron is given by a superposition of contributions from emission at different (odd) harmonics of the main resonance frequency . The main resonance frequency is shown to depend on the initial conditions of the electron, and in particular on its initial transversal coordinate . 
I.V. Dovgan
physics.acc-ph