Synchrotron Production of Photons by a Two-body System
  The power spectrum of the synchrotron radiation generated by the motion of a two-body charged system in an accelerator is derived in the framework of the Schwinger source theory. The final formula can be used to verify the Lorentz length contraction of the two-body system moving in the synchrotron. 
Miroslav Pardy (Masaryk University, Brno, Czech Republic)