Quantum excitation and radiational damping of electron oscillations in cyclic accelerators

Abstract

A study was made of quantum excitation and radiational damping of betatron oscillations on an S-60 synchrotron of the race-track type. Experimental data were obtained by fast photographic recording of the radiation emitted by the accelerated electrons with subsequent photometrical investigation of the pictures. Formulas are given for the amplitude of the axial and radial oscillations. Analysis was made of the experimental data, and they were compared with theory. In the energy region over 400 Mev, the synchrotron had a pronounced excithtion of radial betatron and synchrotron oscillations due to radiation quantum fluctuations. The theory proved to be in satisfactory agreement with experiment but undamped avial osoillations, not predicted by theory, were observed. (M.C.G.)