中国物理B ›› 2022, Vol. 31 ›› Issue (12): 120702-120702.doi: 10.1088/1674-1056/ac8c3c

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Detailed characterization of polycapillary focusing x-ray lenses by a charge-coupled device detector and a pinhole

Xue-Peng Sun(孙学鹏)1,2, Shang-Kun Shao(邵尚坤)1,2, Hui-Quan Li(李惠泉)1,2, Tian-Yu Yuan(袁天语)1,2, and Tian-Xi Sun(孙天希)1,2,†   

  1. 1 Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China;
    2 Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2022-07-18 修回日期:2022-08-18 接受日期:2022-08-24 出版日期:2022-11-11 发布日期:2022-11-21
  • 通讯作者: Tian-Xi Sun E-mail:stx@bnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11675019, 12105020, and 12075031), the Bud Project of Beijing Academy of Science and Technology (Grant No. BGS202106), and the National Key Research and Development Program of China (Grant No. 2021YFF0701202).

Detailed characterization of polycapillary focusing x-ray lenses by a charge-coupled device detector and a pinhole

Xue-Peng Sun(孙学鹏)1,2, Shang-Kun Shao(邵尚坤)1,2, Hui-Quan Li(李惠泉)1,2, Tian-Yu Yuan(袁天语)1,2, and Tian-Xi Sun(孙天希)1,2,†   

  1. 1 Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China;
    2 Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  • Received:2022-07-18 Revised:2022-08-18 Accepted:2022-08-24 Online:2022-11-11 Published:2022-11-21
  • Contact: Tian-Xi Sun E-mail:stx@bnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11675019, 12105020, and 12075031), the Bud Project of Beijing Academy of Science and Technology (Grant No. BGS202106), and the National Key Research and Development Program of China (Grant No. 2021YFF0701202).

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摘要： A method to measure the detailed performance of polycapillary x-ray optics by a pinhole and charge coupled device (CCD) detector was proposed in this study. The pinhole was located between the x-ray source and the polycapillary x-ray optics to determine the illuminating region of the incident x-ray beam on the input side of the optics. The CCD detector placed downstream of the polycapillary x-ray optics ensured that the incident x-ray beam controlled by the pinhole irradiated a specific region of the input surface of the optics. The intensity of the output beam of the polycapillary x-ray optics was obtained from the far-field image of the output beam of the optics captured by CCD detector. As an application example, the focal spot size, gain in power density, transmission efficiency, and beam divergence of different parts of a polycapillary focusing x-ray lenses (PFXRL) were measured by a pinhole and CCD detector. Three pinholes with diameters of 500, 1000, and 2000 μm were used to adjust the diameter of the incident x-ray beam illuminating the PFXRL from 500 μm to the entire surface of the input side of the PFXRL. The focal spot size of the PFXRL, gain in power density, transmission efficiency, and beam divergence ranged from 27.1 μm to 34.6 μm, 400 to 3460, 26.70% to 5.38%, and 16.8 mrad to 84.86 mrad, respectively.

关键词: polycapillary x-ray lenses, charge-coupled device detector, pinhole, performance characterization

Abstract: A method to measure the detailed performance of polycapillary x-ray optics by a pinhole and charge coupled device (CCD) detector was proposed in this study. The pinhole was located between the x-ray source and the polycapillary x-ray optics to determine the illuminating region of the incident x-ray beam on the input side of the optics. The CCD detector placed downstream of the polycapillary x-ray optics ensured that the incident x-ray beam controlled by the pinhole irradiated a specific region of the input surface of the optics. The intensity of the output beam of the polycapillary x-ray optics was obtained from the far-field image of the output beam of the optics captured by CCD detector. As an application example, the focal spot size, gain in power density, transmission efficiency, and beam divergence of different parts of a polycapillary focusing x-ray lenses (PFXRL) were measured by a pinhole and CCD detector. Three pinholes with diameters of 500, 1000, and 2000 μm were used to adjust the diameter of the incident x-ray beam illuminating the PFXRL from 500 μm to the entire surface of the input side of the PFXRL. The focal spot size of the PFXRL, gain in power density, transmission efficiency, and beam divergence ranged from 27.1 μm to 34.6 μm, 400 to 3460, 26.70% to 5.38%, and 16.8 mrad to 84.86 mrad, respectively.

Key words: polycapillary x-ray lenses, charge-coupled device detector, pinhole, performance characterization

中图分类号:  (Diffractometers)

  • 07.85.Jy
41.50.+h (X-ray beams and x-ray optics) 61.05.C- (X-ray diffraction and scattering) 78.70.En (X-ray emission spectra and fluorescence)