| X射线硬化对面密度测量灵敏度的影响 |
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| 引用本文： | 朱鹏飞,叶雁,李泽仁,罗振雄,刘振清,李作友,朱巍,李军.X射线硬化对面密度测量灵敏度的影响[J].强激光与粒子束,2012,24(2):463-466. |
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| 作者姓名： | 朱鹏飞 叶雁 李泽仁 罗振雄 刘振清 李作友 朱巍 李军 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900 |
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| 基金项目： | 国家空间碎片专题研究基金项目（KJSP09203） |
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| 摘 要： | 利用蒙特卡罗方法分别研究了3种能量X光机的光子穿透不同厚度铝的硬化情况及3种能量光机作为光源测量面密度的过程，并开展了相关实验研究,根据模拟结果对比分析了不同能量光机X射线硬化对面密度测量灵敏度的影响，结果表明:对同种能量光机的光子而言，随着面密度变大,射线硬化程度越严重，导致测量灵敏度下降；光子能量越低，测量灵敏度随面密度变大下降越快，反之亦然；对于某一范围面密度被测物，调整X光机电压使X光子刚好穿透并形成有效图像,可获得最理想的测量灵敏度。
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| 关 键 词： | X射线透视法 射线硬化 面密度 测量灵敏度 |
| 收稿时间： | 2011/3/21 |
Effects of X-ray beam hardening on measurement sensitivity of areal density |
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| Zhu Pengfei
,
Ye Yan
,
Li Zeren
,
Luo Zhenxiong
,
Liu Zhenqing
,
Li Zuoyou
,
Zhu Wei
,
Li Jun.Effects of X-ray beam hardening on measurement sensitivity of areal density[J].High Power Laser and Particle Beams,2012,24(2):463-466. |
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| Authors: | Zhu Pengfei Ye Yan Li Zeren Luo Zhenxiong Liu Zhenqing Li Zuoyou Zhu Wei Li Jun |
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| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-109,Mianyang 621900,China |
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| Abstract: | Hardening trends of X-ray beams from three X-ray machines of different energies traversing aluminium plates of different thickness were simulated by means of Monte-Carlo method, as well as the processes of areal density measuring，and corresponding experimental research was done.The effects of X-ray beams hardening on the measurement sensitivity were analyzed. For the X-ray beams from X-ray machine the same energy, X-ray beams harden more with the areal density increasing, which brings about the reduction of the measurement sensitivity; The lower the energy of photons is , the more quickly the measurement sensitivity reduces, and vice versa. For a certain areal density range, when X-ray photons can just traverse the part of the maximum areal density by adjusting the X-ray tube voltage, the best measurement sensitivity can be obtained. |
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| Keywords: | X-ray transmission method X-ray beam hardening areal density measurement sensitivity |
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