High-resolution x-ray monochromatic imaging for laser plasma diagnostics based on toroidal crystal

Haoxuan SI; Jiaqin DONG; Zhiheng FANG; Li JIANG; Shengzhen YI; Zhanshan WANG

doi:10.1088/2058-6272/ac7e25

Plasma Science and Technology > 2023 > 25(1): 015601. > DOI: 10.1088/2058-6272/ac7e25

Haoxuan SI, Jiaqin DONG, Zhiheng FANG, Li JIANG, Shengzhen YI, Zhanshan WANG. High-resolution x-ray monochromatic imaging for laser plasma diagnostics based on toroidal crystal[J]. Plasma Science and Technology, 2023, 25(1): 015601. DOI: 10.1088/2058-6272/ac7e25

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High-resolution x-ray monochromatic imaging for laser plasma diagnostics based on toroidal crystal

1.
MOE Key Laboratory of Advanced Micro-Structured Materials, Tongji University, Shanghai 200092, People's Republic of China
2.
School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
3.
Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, People's Republic of China

More Information

Corresponding author:
Shengzhen YI, E-mail: 023123@tongji.edu.cn

Zhanshan WANG, E-mail: wangzs@tongji.edu.cn
Received Date: May 03, 2022
Revised Date: July 01, 2022
Accepted Date: July 03, 2022
Available Online: December 05, 2023
Published Date: October 30, 2022

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Abstract

Abstract

Monochromatic x-ray imaging is an essential method for plasma diagnostics related to density information. Large-field high-resolution monochromatic imaging of a He-like iron (Fe XXV) K_α characteristic line (6.701 keV) for laser plasma diagnostics was achieved using a developed toroidal crystal x-ray imager. A high-index crystal orientation Ge ⟨531⟩ wafer with a Bragg angle of 75.37° and the toroidal substrate were selected to obtain sufficient diffraction efficiency and compensate for astigmatism under oblique incidence. A precise offline assembly method of the toroidal crystal imager based on energy substitution was proposed, and a spatial resolution of 3–7 μm was obtained by toroidal crystal imaging of a 600 line-pairs/inch Au grid within an object field of view larger than 1.0 mm. The toroidal crystal x-ray imager has been successfully tested via side-on backlight imaging experiments of the sinusoidal modulation target and a 1000 line-pairs/inch Au grid with a linewidth of 5 μm using an online alignment method based on dual positioning balls to indicate the target and backlighter. This paper describes the optical design, adjustment method, and experimental results of a toroidal crystal system in a laboratory and laser facility.
- laser plasma diagnostics,
- toroidal crystal,
- monochromatic x-ray imaging

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Acknowledgments

This work is supported by National Natural Science Foundation of China (No. 11805212) and National Key Research and Development Program of China (No. 2019YFE03080200).

References (32)

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High-resolution x-ray monochromatic imaging for laser plasma diagnostics based on toroidal crystal

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