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双晶单色器结构改进及稳定性研究

郭思明 侯懂杰 王二彦 宋瑞强 周鹏跃

郭思明,侯懂杰,王二彦,等. 双晶单色器结构改进及稳定性研究[J]. 计量科学与技术,2021, 65(5): 8-13 doi: 10.12338/j.issn.2096-9015.2020.9024
引用本文: 郭思明,侯懂杰,王二彦,等. 双晶单色器结构改进及稳定性研究[J]. 计量科学与技术,2021, 65(5): 8-13 doi: 10.12338/j.issn.2096-9015.2020.9024
GUO Siming, HOU Dongjie, WANG Eryan, SONG Ruiqiang, ZHOU Pengyue. Structure Improvement and Stability Research of Double Crystal Monochromator[J]. Metrology Science and Technology, 2021, 65(5): 8-13. doi: 10.12338/j.issn.2096-9015.2020.9024
Citation: GUO Siming, HOU Dongjie, WANG Eryan, SONG Ruiqiang, ZHOU Pengyue. Structure Improvement and Stability Research of Double Crystal Monochromator[J]. Metrology Science and Technology, 2021, 65(5): 8-13. doi: 10.12338/j.issn.2096-9015.2020.9024

双晶单色器结构改进及稳定性研究

doi: 10.12338/j.issn.2096-9015.2020.9024
基金项目: 国家重点研发计划(2016YFF0200802);质量技术基础能力建设(ANL1902)
详细信息
    作者简介:

    郭思明(1990-),中国计量科学研究院副研究员,研究方向:电离辐射计量,邮箱:gsm@nim.ac.cn

Structure Improvement and Stability Research of Double Crystal Monochromator

  • 摘要: 基于布拉格衍射的双晶衍射结构是常用于同步辐射光束线和单能X射线辐射装置上的单色器的核心部件。实验考察了T结构双晶单色器产生的单能X射线的稳定性,受Channel-cut单色器结构启发设计了新型的双晶单色器结构,并实验测量了衍射产生的单能X射线稳定性。实验结果显示,由于T结构双晶单色器结构缺陷导致其产生的单能X射线注量稳定性较差,而新的双晶单色器结构产生的单能X射线注量稳定性好于1.0%,产生单能X射线的能量范围和注量率都得到明显的提升。
  • 图  1  布拉格衍射示意图

    Figure  1.  The diagram of Bragg diffraction

    图  2  单色化示意图

    Figure  2.  The diagram of monochromatization

    图  3  T结构双晶单色器

    Figure  3.  The T-structure double crystal monochromator

    图  4  双晶单色器产生单能X射线稳定性测量结果

    Figure  4.  Monochromatic X-ray stability generated by double crystal monochromator

    图  5  光机产生韧致辐射X射线稳定性

    Figure  5.  The stability of bremsstrahlung X-ray generated by X-ray machine

    图  6  Si(111) Channel-cut单色器

    Figure  6.  Channel-cut monochromator of Si(111)

    图  7  10 keV单能X射线能谱

    Figure  7.  Monochromatic X-ray spectra of 10 keV

    图  8  类似于Channel-cut的双晶结构

    Figure  8.  The double crystal structure similar to Channel-cut

    图  9  优化设计

    1.1晶卡槽; 2.2晶卡槽;3.控制摆动的精密电机;4.控制转动的精密电机;5.提高摆动精度的加长臂杠杆。

    Figure  9.  The optimization of design

    图  10  实验装置示意图

    Figure  10.  The diagram of experimental device

    图  11  单能X射线测量结果及稳定性

    Figure  11.  Measurement results and stability of monochromatic X-ray

    图  12  改进后稳定性测量结果

    Figure  12.  Measurement results of the improved stability

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    [6] Golovchenko J A, Batterman B W, Brown W L. Observation of internal x-ray wave fields during Bragg diffraction with an application to impurity lattice location[J]. Physical Review B Condensed Matter, 1974, 10(10): 4239-4243. doi: 10.1103/PhysRevB.10.4239
    [7] Ohta T, Stefan P M, Nomura M, et al. Design and performance of a UHV compatible soft X-ray double crystal monochromator at the proton factory[J]. Nuclear Instruments & Methods in Physics Research, 1986, 246(1-3): 373-376.
    [8] Kitajima, Y, Takata, et al. Improvements and recent performance of a double-crystal monochromator for a soft x-ray undulator at the Photon Factory[J]. Rev. Sci. Instrum, 1992, 63(1): 886-886. doi: 10.1063/1.1142636
    [9] Treimer W, Strobl M, Hilger A. Development of a tuneable channel cut crystal[J]. Physics Letters A, 2001, 289(3): 151-154. doi: 10.1016/S0375-9601(01)00592-8
    [10] Bellmann D, Staron P, Becker P. Performance of a double crystal diffractometer with different channel-cut perfect Si crystals[J]. Physica B Physics of Condensed Matter, 2000, 276(276): 124-125.
    [11] Végs K, Jergel M, Siffalovic P, et al. Towards high-flux X-ray beam compressing channel-cut monochromators[J]. Journal of Applied Crystallography, 2016, 49(6): 1885-1892. doi: 10.1107/S1600576716013376
    [12] Khachatryan R , Tkachuk A , Chu Y S , et al. Open-faced Z-shaped channel-cut X-ray monochromator[J]. Proceedings of Spie the International Society for Optical Engineering, 2004(5537): 171-176.
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出版历程
  • 网络出版日期:  2021-04-21
  • 刊出日期:  2021-06-24

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