Experimental study on the angular and polarization characteristics of relativistic electron beam synchrotron radiation

The results of experimental study on angular distributions of linear components of synchrotron radiation (SR) polarization in the range of varying the ratio of the observed wave length to the critical wave length from 0.4 to 2 are presented. The effect of electron beam parameters on angular distribution of π-component is experimentally and theoretically investigated. A model accounting for the effect of dimensions, divergence of an electron beam and value of phase shear between SR σ and π-components on SR angular distriubution is suggested. Agreement of experimental and calculation data is obtained within the limit of measurement accuracy (2.5%). One of the reasons for appearance of SR angular distribution asymmetry is experimentally disclosed: change of optical characteristics of windows (possibility under the effect of bremsstrahlung). The experimental angular distributions with the calculated ones are compared according to the theory with account of electron betatron oscillations, good agreement of the theory and the experiment is obtained