用于能量标定的束流损失测量系统

摘要

In order to measure beam energy in Hefei Light Source accurately,a new set of precise and sensitive beam loss measurement system is built,and a kind of plastic scintillator detector which has high detection efficiency for low energy photons is adopted.According to the measured signal of beam loss,a set of digital signal processing circuit is developed.The experimental results show that the beam loss measurement system meets the requirements of the spin resonant depolarization method and can obtain the change of the beam loss accurately and sensitively.The measuring principle and theoretical basis of spin resonant depolarization is also introduced.%为精确地测量合肥电子储存环电子束的能量,建立了一套束流损失的测量装置,选择了一款对低能光子探测效率高的塑料闪烁体探测器,根据测量到的束流损失信号研制了一套数字化的信号处理电路,并进行了实际测量.测量结果表明该束流损失测量系统能够精确、灵敏地反映出束流损失的变化,可以用于自旋共振退极化法标定电子束能量的实验；并介绍了自旋共振退极化法的测量原理及依据的理论基础.