Lead glass calorimeter calibration and efficiency analysis for Coulomb sum rule (CSR) experiment in JLab Hall-A

Two layers of lead glass calorimeter are installed for additional PID analyses in each high resolution spectrometer (HRS) at Hall-A in Jefferson Lab (JLab). The Fumili minimization method of ROOT analysis software and quasi-elastic data of CSR experiment conducted by the authors in the early year of 2008 at JLab were used in the calibration of the calorimeter detector on HRS for the data analysis of CSR experiment. Since some high voltage changes in hardware settings, the lead glass calorimeter detector needed to be calibrated correspondingly. The calibration results are reasonable after this procedure. The best resolution of the calorimeter for the scattering electron was about 0048 GeV when its momentum was at 10 GeV after calibration. Total electron efficiency and pion rejection can reach 993% and 998%, respectively.