The measurement of electron beam transverse sizes by synchrotron radiation interferometry for HLS II

In order to improve accuracy of electron beam transverse sizes measurement, the vertical and horizontal synchrotron radiation light interferometers have been designed to measure beam transverse sizes for the upgrade project of Hefei Light Source (HLS II). In this paper, the light intensity distributions of the interferogram are descussed, and parameters of the interferometers are optimized. The interferograms are simulated under MATLAB. Taking integrations of two-dimensional interferogram intensity, normalized one-dimensional interference intensities distribution of the vertical and horizontal interferogram are obtained. The two curves are fitted to compare the beam transverse sizes with the designed sizes, and this verifies the feasibility of this method. Finally, several factors that affect the beam sizes measurement are discussed.