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四通道球面弯晶成像系统设计及实验研究

忻秋琪 李亚冉 陈亮 刘汉威 徐捷 王新 穆宝忠

忻秋琪, 李亚冉, 陈亮, 等. 四通道球面弯晶成像系统设计及实验研究[J]. 强激光与粒子束, 2019, 31: 052001. doi: 10.11884/HPLPB201931.190006
引用本文: 忻秋琪, 李亚冉, 陈亮, 等. 四通道球面弯晶成像系统设计及实验研究[J]. 强激光与粒子束, 2019, 31: 052001. doi: 10.11884/HPLPB201931.190006
Xin Qiuqi, Li Yaran, Chen Liang, et al. Design and experimental research of four-channel spherically bent crystal imaging system[J]. High Power Laser and Particle Beams, 2019, 31: 052001. doi: 10.11884/HPLPB201931.190006
Citation: Xin Qiuqi, Li Yaran, Chen Liang, et al. Design and experimental research of four-channel spherically bent crystal imaging system[J]. High Power Laser and Particle Beams, 2019, 31: 052001. doi: 10.11884/HPLPB201931.190006

四通道球面弯晶成像系统设计及实验研究

doi: 10.11884/HPLPB201931.190006
基金项目: 

国家重点研发计划项目 2017YFA0403300

详细信息
    作者简介:

    忻秋琪(1993-), 男,硕士,主要从事X射线成像研究;xinqiuqi@tongji.edu.cn

    通讯作者:

    穆宝忠(1975-), 男,教授,主要从事X射线光学系统研究;mubz@tongji.edu.cn

  • 中图分类号: O434.1

Design and experimental research of four-channel spherically bent crystal imaging system

  • 摘要:

    基于动态X射线荧光成像技术对高集光效率、单色化成像诊断设备的需求,提出了一种四通道球面弯晶成像系统设计。采用“圆锥体”空间排布方式,解决了多个通道耦合问题。通过调整弯晶姿态,实现了像点的合理分布。针对4.51 keV能点,采用Ge(400)球面弯晶作为成像元件,给出了四通道弯晶成像系统的光学初始结构参数。在实验中利用Ti靶X射线光管,对单个通道进行了网格背光成像,获得的二维图像放大倍数为7.8倍,空间分辨率达到15 μm,初步验证了系统的成像性能。四通道弯晶成像系统与分幅相机结合,能有效解决动态X射线荧光成像技术信号弱、图像信噪比低的技术难点。

  • 图  1  球面弯晶成像原理

    Figure  1.  Principle of spherically bent crystal imaging

    图  2  四通道球面弯晶成像系统示意图

    Figure  2.  Schematic diagram of four-channel spherically bent crystal imaging system

    图  3  Ge(400)晶体XRD测试结果

    Figure  3.  XRD test result of Ge(400)

    图  4  背光成像系统和自发光成像系统的区别

    Figure  4.  Comparison between the backlighter system and self-emission imager

    图  5  单个通道的成像结果

    Figure  5.  Imaging result of single channel

    表  1  四通道球面弯晶成像系统参数

    Table  1.   Parameters of four-channel spherically bent crystal imaging system

    E/ keV crystal 2d/nm θ/(°) L/mm β/(°) R/mm p/mm qm/mm
    4.51 Ge(400) 0.282 8 76.4 10 30 250 141 878
    qs/mm q/mm M Δd/mm α1/(°) α2/(°) α3/(°) α4/(°)
    1463 1102 7.8 10 -0.29 0.29 -0.87 0.87
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-01-07
  • 修回日期:  2019-03-26
  • 刊出日期:  2019-05-15

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