Development of stress-free Laue diffraction crystal for x-ray beam splitting

Chang-Zhe Zhao; Shang-Yu Si; Qian-Shun Diao; Zhen Hong; Zhong-Liang Li; Ti-Qiao Xiao

doi:10.1117/12.3021665

15 February 2024 Development of stress-free Laue diffraction crystal for x-ray beam splitting

Chang-Zhe Zhao, Shang-Yu Si, Qian-Shun Diao, Zhen Hong, Zhong-Liang Li, Ti-Qiao Xiao

Proceedings Volume 13069, International Conference on Optical and Photonic Engineering (icOPEN 2023); 130691A (2024) https://doi.org/10.1117/12.3021665
Event: International Conference on Optical and Photonic Engineering (icOPEN 2023), 2023, Singapore, Singapore

Abstract

In order to achieve the effective splitting of X-ray, the perfect crystal whose the space of lattice plane comparable to the X-ray wavelength can be used as beam splitter. This beam splitter utilizes the diffraction effect of Laue crystal to accurately manipulate X-ray beam. A stress-free crystal with thin thickness is crucial for high-quality X-ray splitting. The working area of crystal was thinned by acid etching. Additionally, the base of crystal was cut from a floating-zone silicon single-crystal ingot, which prevented the spread of stress to the working area of crystal in fabrication and experiment. The experiment of Laue diffraction was conducted at the synchrotron radiation facility. In order to obtain the inherent rocking curve and consistent imaging field of view, a non-dispersion configuration was employed to match the energy bandwidth of the incident beam with the Laue diffraction crystal. Then diffraction splitting within the energy bandwidth of the Laue crystal was achieved by utilizing a collimator to reduce the divergence of the incident beam. The fine structure of the diffraction curve was measured experimentally, and the slope error of linear fitting between the high-angle and low-angle positions of peaks is less than 0.4%, which satisfies the requirement of stress-free diffraction splitting. The design and characterization of this Laue diffraction crystal provide technical support for various applications, such as X-ray ghost imaging, X-ray multi-projection imaging, and beamline measurement at wavelength.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chang-Zhe Zhao, Shang-Yu Si, Qian-Shun Diao, Zhen Hong, Zhong-Liang Li, and Ti-Qiao Xiao "Development of stress-free Laue diffraction crystal for x-ray beam splitting", Proc. SPIE 13069, International Conference on Optical and Photonic Engineering (icOPEN 2023), 130691A (15 February 2024); https://doi.org/10.1117/12.3021665

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KEYWORDS

Crystals

Laser crystals

Diffraction

X-rays

Beam splitters

X-ray diffraction

X-ray imaging

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