脉冲X射线剂量率测量不确定度分析  

Analysis of measurement uncertainty of X-ray dose rate

作　　者：丛培天[1] 陈伟[1] 韩娟娟[1] 郭宁[1] 苏兆峰[1] 张信军[1] 孙剑锋[1] 王亮平[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《强激光与粒子束》2010年第11期2773-2777,共5页High Power Laser and Particle Beams

摘　　要："强光一号"短脉冲高能X射线剂量率测量,主要包括脉冲射线总剂量与脉冲射线时间宽度的测量,前者采用热释光剂量计测量,后者采用PIN半导体探测器记录。根据不确定度传递数学模型,分析了影响X射线剂量和脉冲宽度测量结果的因素。针对"强光一号"短脉冲高能X射线测量,定量地给出了各种因素引入的测量不确定度,总剂量测量是影响剂量率测量准确性的决定性因素,其相对标准不确定度为25.1%,脉冲宽度测量不确定度为3.7%,剂量率测量扩展不确定度为50.8%,置信概率95%。The measurement of short pulse X-ray of high energy produced by Qiangguang Ⅰ accelerator for radiation effect study includes X-ray dose and pulse duration measuring.The thermoluminescence dosemeter（TLD） is used to measure X-ray dose,and the PIN semiconductor detector is employed for recording waveforms of X-ray.The dose rate is calculated out by the results of X-ray dose and pulse duration.By the mathematic model of uncertainty,factors with important effect on X-ray measuring are analyzed.For the measurement uncertainty of X-ray pulse duration is 3.7%,the measuring of X-ray dose with relative standard uncertainty of 25.1% plays a crucial role in determining X-ray dose rate,and the expanded uncertainty of dose rate is about 50.8% with confidence probability of 95%.

关 键 词：辐射效应 热释光剂量计 X射线 脉冲 剂量率 不确定度 

分 类 号：TL8[核科学技术—核技术及应用] O536[理学—等离子体物理]