X射线闪烁屏针孔相机  

X-ray Scintillation Layer Pinhole Camera

作　　者：詹夏宇[1] 唐琦[1] 陈家斌[1] 宋仔峰[1] 刘中杰[1] 陈黎[1] 梅雨[1] 刘慎业[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《核电子学与探测技术》2014年第8期968-971,共4页Nuclear Electronics & Detection Technology

摘　　要：研制了用于ICF实验激光焦斑监测的X射线闪烁屏针孔相机,通过使用Cs I闪烁屏,能够有效的减小焦斑成像中硬X射线份额,图像的信噪比有了很大提高。使用蒙卡方法对Cs I的能量沉积进行了模拟,计算出适合于针孔相机的闪烁屏厚度。由于针状Cs I闪烁屏的分辨力优于一般闪烁体,制造了针状Cs I闪烁屏作为针孔相机的成像元件。在X射线管上做了Cs I闪烁屏的成像实验,实验表明闪烁屏具有较好的分辨力,最小分辨达到15 lp/mm,整个X射线闪烁屏针孔相机的分辨力好于24μm,和普通针孔相机的分辨力基本相当。An X-ray scintillation layer pinhole camera was developed for diagnosing the laser focal spot in ICF experiment .As the scintillation layer reduces the fraction of hard X -ray in laser focal spot imaging , and the signal-to-noise ratio of the image can be highly promoted .The X-ray energy deposit in CsI scintillator was simulated with Monte Carlo method , and the proper thickness of the CsI scintillation layer for pinhole camera was determined .Needle scintillation layer has better spatial solution than usual scintillator , so a CsI needle scintillation layer was made as the imaging device of pinhole camera .The imaging experiment showed that the spatial resolution of CsI layer was 15 lp/mm, and the spatial resolution of X -ray scintillation layer pinhole camera was better than 24 μm, which was nearly equal to the spatial resolution of usual pinhole camera .

关 键 词：X射线成像 闪烁探测器 针孔成像 针状CsI闪烁屏 

分 类 号：TL812.1[核科学技术—核技术及应用] O434.12[机械工程—光学工程]