| 电子加速器X射线源能谱整形理论与模拟研究 |
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| 引用本文： | 张玉龙,陈怀璧,查浩.电子加速器X射线源能谱整形理论与模拟研究[J].CT理论与应用研究,2014(1):1-8. |
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| 作者姓名： | 张玉龙 陈怀璧 查浩 |
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| 作者单位： | [1]清华大学工程物理系,北京100084 [2]清华大学粒子技术与辐射成像教育部重点实验室,北京100084 |
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| 摘 要： | 利用能谱整形技术产生的x射线优化能谱可减小伪影误差，提高无损检测材料识别精度。如何利用能谱整形技术产生指定的优化能谱是要解决的关键问题。为解决这一问题，对能谱整形基本理论进行了研究，设定了能谱整形的目标，利用蒙特卡罗方法模拟计算出电子加速器出射x射线能谱，对能谱和整形材料的线性衰减系数进行拟合，计算了能谱整形所需要的相关参数并确定能谱整形方法，运用蒙特卡罗方法模拟验证了所采用的能谱整形方法的合理性。
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| 关 键 词： | 电子加速器 x射线 能谱整形 材料识别 无损检测 |
Energy Shaping Theory and Simulation for Electron Linac X-ray Source |
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| ZHANG Yu-long,CHEN Huai-bi,ZHA Hao.Energy Shaping Theory and Simulation for Electron Linac X-ray Source[J].Computerized Tomography Theory and Applications,2014(1):1-8. |
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| Authors: | ZHANG Yu-long CHEN Huai-bi ZHA Hao |
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| Institution: | 1.Department of Engineering Physics, Tsinghua University, Beijing 100084, China 2.Key Laboratory of Particle ＆ Radiation Imaging (Tsinghua University), Ministry of Education, Beijing 100084, China) |
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| Abstract: | Energy shaping technology could be used to reduce artifact error and increase nondestructive testing accuracy. How to produce required spectrum is a key issue. This article proposes spectrums whose peak energy are 3 MeV, 6 MeV and 12 MeV especially as required spectrum and discusses calculation method for energy shaping. In order to calculate related parameters, this article simulates X-ray spectrum produced by electron Linac with Monte-Carlo method, makes equation fitting for the X-ray spectrum and linear attenuation coefficients of shaping materials, decides final arrangement for shaping according to calculation results and verifies the arrangement with Monte-Carlo method. |
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| Keywords: | electron Linac X-ray energy shaping material discrimination nondestructive testing |
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