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共振非弹性散射光谱仪设计原理及性能测试

安然 李泽仁 阳庆国 叶雁

安然, 李泽仁, 阳庆国, 等. 共振非弹性散射光谱仪设计原理及性能测试[J]. 强激光与粒子束, 2018, 30: 071001. doi: 10.11884/HPLPB201830.170153
引用本文: 安然, 李泽仁, 阳庆国, 等. 共振非弹性散射光谱仪设计原理及性能测试[J]. 强激光与粒子束, 2018, 30: 071001. doi: 10.11884/HPLPB201830.170153
An Ran, Li Zeren, Yang Qingguo, et al. Design principle and performance of RIXS spectrometer[J]. High Power Laser and Particle Beams, 2018, 30: 071001. doi: 10.11884/HPLPB201830.170153
Citation: An Ran, Li Zeren, Yang Qingguo, et al. Design principle and performance of RIXS spectrometer[J]. High Power Laser and Particle Beams, 2018, 30: 071001. doi: 10.11884/HPLPB201830.170153

共振非弹性散射光谱仪设计原理及性能测试

doi: 10.11884/HPLPB201830.170153
基金项目: 

国家自然科学基金项目 11675277

详细信息
    作者简介:

    安然(1989—),男,博士研究生,从事四代光源光束线及诊断技术相关研究;081976@tongji.edu.cn

    通讯作者:

    李泽仁(1962—),男,研究员,从事光电子学研究;zeren109@yeah.net

  • 中图分类号: TL99

Design principle and performance of RIXS spectrometer

  • 摘要: 共振非弹性散射(RIXS)是一种研究分子、材料的电子结构的X射线光谱技术,其对光源、光谱仪都有着极为苛刻的要求。掌握先进RIXS光谱仪设计思想、使用方法、性能等对未来研究均具有重要意义。通过探究其设计思想,从光程函数理论方式出发并计算变间距光栅参数,逐一分析各像差项对最终成像结果影响; 开发可见激光的非接触式测量方式测量电机编码与光谱仪部件角度关系,并验证该方式的有效性; 在同步辐射实验站直接使用同步辐射X射线,对光谱仪成像分辨率进行标定,掌握光谱仪工作性能; 最终将SHADOW模拟数据与实际探测数据进行对比,表明光谱仪安装调试满足设计及实验要求。
  • 图  1  qRIXS光谱仪图结构图

    Figure  1.  Side view of qRIXS spectrometer

    图  2  qRIXS光谱仪各光学元件几何图

    Figure  2.  Geometrical relationship of elements

    图  3  探测器处于不同角度,所对应的光子能量探测范围

    Figure  3.  Detected energy for different arm angle

    图  4  光栅成像几何示意图

    Figure  4.  Geometry of grating

    图  5  凹面镜与平面光栅空间位置关系

    Figure  5.  Relationship of mirror and grating

    图  6  凹面镜及平面光栅控制电机连接杆示意图

    Figure  6.  Rods between motors and mirror & grating

    图  7  倾角测量方法示意图

    Figure  7.  Measurement of angle

    图  8  8A2实验站实验设置

    Figure  8.  Setup for experiment at 8A2 Endstation

    图  9  制备的样品(a)人工入射狭缝5 μm×100 μm (V×H)及(b) 透射Co样品

    Figure  9.  Samples fabricated (a) Slit structure 5 μm×100 μm and (b) transmission test sample for Co

    图  10  光栅系数与光斑带宽关系

    Figure  10.  Relationship of grating grooves parameter and bandwidth of spot

    图  11  各电机编码与倾角的关系

    Figure  11.  Relationship of each angle and motor encoder

    图  12  各光子能量光谱仪能量分辨率模拟及实验结果

    Figure  12.  Simulation and result for each photon energy

    表  1  凹面镜及变间距光栅主要参数

    Table  1.   Main parameters of mirror and grating

    mirror VLS-grating
    substrates geometry rectangular rectangular
    material Si〈100〉 Si〈100〉
    (L, W, H)/mm (90 90 20) (100 90 20)
    optical surface coat Pt 40 nm +/-10% Au 100 nm
    aperture (L, W)/mm (80, 80) (80, 74)
    geometry parameters concave plane
    spherical radius 29.472 m +/-1% (direction mark)
    下载: 导出CSV

    表  2  三坐标测量标定参数分析

    Table  2.   Result and analysis of coordinate measuring

    mirror (z=-90 mm) grating (z=-83 mm)
    A
    B
    -159.6 μm
    -133.2 μm
    Θx=-0.94′ -107.5 μm
    -101.3 μm
    Θx=0.27″
    C
    D
    -81.2 μm
    -129.5 μm
    Θy=-1.76′ -104.9 μm
    -98.9 μm
    Θy=0.225″
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-12-05
  • 修回日期:  2018-03-22
  • 刊出日期:  2018-07-15

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