Transverse electron beam size measurements using the Lloyd´s mirror scheme of synchrotron light interference

A method for horizontal and vertical electron beam size measurements using the Lloyd´s mirror with monochromatic synchrotron light is presented. The use of the interference scheme with synchrotron light may result in fringes of the light intensity distribution, the way it takes place in the case of point light sources. The dimensions of the interference pattern and the fringes contrast are found to essentially depend on transverse size of the emitting electron beam. The resulting light intensity distributions can be calculated analytically. This allows one to determine the transverse size of the electron beam immediately from the results of the intensity distribution measurements. Analytical expressions for the intensity distributions of synchrotron light in the Lloyd´s mirror interference scheme are given. Beam size measurement results on the Siberia-1 storage ring by the method concerned are presented