强流脉冲电子束位置测量探头标定结果不确定度分析

摘要

根据探测器测量原理和标定方法、特点,分析其位置测量的不确定度主要来源于测量过程的A类不确定度、B类不确定度和最小二乘法引入的拟合不确定度,确定了各个不确定度的计算方法,得到了探测器的合成不确定度,对于应用于神龙二号直线感应加速器的电阻环和磁探测器,其合成不确定度约为0.1 mm.%Beam position as a key parameter of intense electron beam linear induction accelerator,is criterion of electron beam tuning and experiment.The resistive ring monitor(RRM) and B-dot monitor are often used to measure the beam current and position simultaneously.According to the measuring principle,the calibration method and characters of monitor,type A and type B standard uncertainties and least square fit uncertainty were analyzed as the uncertainty sources of beam position monitors RRM and B-dot,and their evaluation were decided.The combined standard uncertainty of Dragon-Πresistive ring monitor and B-dot is less than 0.1 mm based on calibrating data.