| 3 | NaI (Tl) calorimeter calibration and simulation for Coulomb sum rule experiment in Hall-A at Jefferson Lab显示文摘A precision measurment of inclusive electron scattering cross sections is carried out at Jefferson Lab in the quasi-elastic region for 4 He, 12 C, 56 Fe and 208 Pb targets. The longitudinal (R L ) and transverse (R T ) response functions of the nucleon need to be extracted precisely in the momentum transfer range 0.55 GeV/c≤ | q | ≤1.0 GeV/c. To achieve the above goal, a NaI (Tl) calorimeter is used to distinguish good electrons from background, including pions and low energy electrons rescattered from the walls of the spectrometer magnets. Due to a large set of kinematics and changes in HV settings, a number of calibrations are performed for the NaI (Tl) detector. Corrections for a few blocks of NaI (Tl) with bad or no signal are applied. The resolution of the NaI (Tl) detector after calibration reached δE/E^(1/2) ≈ 3% at E=1 GeV. The performance of the NaI (Tl) detector is compared with a simulation. The good calibration and background analysis for the NaI(Tl) detector are very important for the reduction of the systematic error of cross sections and the separation of R L and R T . | 闫新虎 C.Alexandre 陈剑平 C.Seonho 吕海江 M.Zein-Eddine Oh Yoomin S.Vincent 叶云秀 姚欢 | 2011 | Chinese Physics C2011，35，5： | 0 |
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