| 狭缝法测量X射线斑点大小 |
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| 引用本文： | 李勤,石金水,禹海军,王莉萍,何晖.狭缝法测量X射线斑点大小[J].强激光与粒子束,2006,18(10):1691-1694. |
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| 作者姓名： | 李勤 石金水 禹海军 王莉萍 何晖 |
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| 作者单位： | 中国工程物理研究院 流体物理研究所, 四川 绵阳 621900 |
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| 摘 要： | 应用狭缝光阑成像法测量X射线斑点大小，通过狭缝成像获得光源的线扩展函数和调制传递函数MTF，而后从MTF为0.5所对应的空间频率之值确定出光源的光斑大小。应用该方法测量得到12 MeV 直线感应加速器(LIA)X射线斑点大小为3.2 mm，及磁透镜在不同焦距下的X射线斑点大小。该项测量为12 MeV LIA电子束聚焦调试实验提供有效判据。
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| 关 键 词： | X射线 斑点 调制传递函数 狭缝光阑 |
| 文章编号： | 1001-4322(2006)10-1691-04 |
| 收稿时间： | 2005-09-15 |
| 修稿时间： | 2006-03-29 |
Slit X-ray spot size measurement technique |
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| LI Qin, SHI Jin-shui, YU Hai-jun, WANG Li-ping, HE Hui.Slit X-ray spot size measurement technique[J].High Power Laser and Particle Beams,2006,18(10):1691-1694. |
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| Authors: | LI Qin SHI Jin-shui YU Hai-jun WANG Li-ping HE Hui |
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| Institution: | Institute of Fluid Physics, CAEP, P.O.Box 919-106,Mianyang 621900,China |
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| Abstract: | The high intense electron beam interacts with a high Z target,producing the X-rays for flash radiography.The focal spot size of the X-ray source is a critical parameter which degrades resolution in the flash radiography.This paper describes a slit which is used to measure the focal spot size.The X-ray spot image is obtained through the slit.The line spread function(LSF) and modulation transfer function(MTF) of X-ray spot are obtained from the slit image data,and the X-ray spot size is determined by the MTF.The measured X-ray spot size of the 12 MeV linear induction accelerator(LIA) is 3.2 mm.Different focal lengths are used,and the relevant X-ray spots size is measured for tuning the accelerator. |
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| Keywords: | X-ray Spot size Modulation transfer function(MTF) Slit |
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