中文摘要：

在JLab的A大厅上的库仑求和规则（CSR）实验中,为了得到CSR实验所必需的电子对不同低温靶（氢,氦,碳,铁,铅）的散射截面,对束流监测器在不同的电流值（0.2,0.5,1,2,5,10,20,40,60μA）进行了更好地刻度,以得到不同运动学参量下更精确的束流电荷.

英文摘要：

To obtain the cross section of electron scattering on different cryogenic targets（2H,4He,12C,56Fe,208Pb） for the Coulomb sum rule（CSR） measurement in JLab Hall-A,the beam current monitor（BCM） was calibrated more reliable than before at different current settings（0.2,0.5,1,2,5,10,20,40,60 μA） to determine the beam charge precisely at different kinematic settings.