Hall-A库仑求和规则实验束流刻度

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(0.2,0.5,1,2,5,10,20,40,60 μA)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.%To obtain the cross section of electron scattering on different cryogenic targets (2H,4 He,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.