The synchrotron radiation from the Volkov solution of the Dirac equation

The aim of this article is to show it is possible to get the power spectrum of the synchrotron radiation from the Volkov solution of the Dirac equation and the S-matrix. We also generalize the Bargmann-Michel-Telegdi equation for the spin motion in case it involves the radiative term. This equation can play crucial role for the spin motion of protons in LHC. The axion production in the magnetic field described by the Volkov solution is discussed