Double-spherically bent crystal high-resolution X-ray spectroscopy of spatially extended sources

Wang, Ruirong; Fang, Zhiheng; H, An; Xiong, Jun; Xie, Zhenwei; Guo, E. F.; Wang, Chen; Lei, Anle; Wang, Wei

doi:10.3788/col202018.061101

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…The optical properties of a spherical crystal include a large numerical aperture and high spatial and spectral resolution, which have obvious prospects for applications in high-energy X-ray imaging [9,10] . Koch et al [11] obtained the integrated reflectivity of a Ge h15 7 7i bent crystal at the Ru Heα characteristic line (19.7 keV) and evaluated the feasibility of using it in imaging experiments, although they did not conduct imaging experiments themselves.…”

Section: Introductionmentioning

confidence: 99%

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Si,

Shan,

et al. 2023

中国光学快报

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Curved crystal imaging is an important means of plasma diagnosis. Due to the short wavelengths of high-energy X rays and the fixed lattice constant of the spherical crystal, it is difficult to apply the spherical crystal in high-energy X-ray imaging. In this study, we have developed a high-energy, high-resolution X-ray imager based on a toroidal crystal that can effectively correct astigmatism. We prepared a Ge h5 1 1i toroidal crystal for backlighting Mo Kα1 characteristic lines (∼17.48 keV) and verified its high-resolution imaging ability in high-energy X-ray region, achieving a spatial resolution of 5-10 μm in a field of view larger than 1.0 mm.

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Section: Introductionmentioning

confidence: 99%

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Si,

Shan,

et al. 2023

中国光学快报

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“…X-ray free electron laser (XFEL) devices have the advantages of bright intensity, high collimation, high brightness, narrow pulse, high polarization, and wide and continuously adjustable energy, which are unmatched by many conventional and laboratory light sources [1][2][3][4]. Brightness is a key indicator of X-ray light sources.…”

Section: Introductionmentioning

confidence: 99%

Application of Flow Field Analysis in Ion Beam Figuring for Ultra-Smooth Machining of Monocrystalline Silicon Mirror

Wang

Fang

et al. 2022

Micromachines

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X-ray free-electron lasers are large modern scientific devices that play an important role in fields such as frontier physics and biomedicine. In this study, a light source is connected to an experimental station through beam lines, which requires numerous ultra-smooth and high-precision X-ray mirrors. Monocrystalline silicon is an ideal substrate material where ion-beam figuring is required. However, the ultra-smooth surface is damaged after the ion-beam figuring. Through an analysis of the machined surface, it is found that in the process of vacuum pumping, the impurities in the cavity adhere to the machined surface and increase the roughness after processing. Therefore, an optimized vacuum-pumping scheme is proposed. The experiment demonstrates that the original value of the processed surface roughness remains unchanged.

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Double-spherically bent crystal scheme of stigmatic x ray monochromatic backlit imaging

Wang¹,

honghai²,

zhiyong³

et al. 2022

Opt. Lett.

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We propose an aberration-free monochromatic x ray backlit imaging scheme using a combination of convex and concave spherically bent crystals. This configuration works with a wide range of Bragg angles, satisfying the conditions for stigmatic imaging at a particular wavelength. However, the assembly accuracy of the crystals must meet the Bragg relation criteria for spatial resolution to increase the detection efficiency. Here, we develop a collimator prism with a cross reference line engraved on a plane mirror to adjust a matched pair of Bragg angles as well as the intervals between the two crystals and the object to be coupled with the detector. We explore the realization of monochromatic backlighting imaging with a concave Si-533 crystal and a convex α-Quartz-2023 crystal, obtaining a spatial resolution of approximately 7 µm and a field of view of at least 200 µm. To the best of our knowledge, this is the best spatial resolution of monochromatic images of a double-spherically bent crystal to date. Our experimental results are presented to demonstrate the feasibility of this imaging scheme with x rays.

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Double-spherically bent crystal high-resolution X-ray spectroscopy of spatially extended sources

Cited by 3 publications

References 17 publications

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal

Application of Flow Field Analysis in Ion Beam Figuring for Ultra-Smooth Machining of Monocrystalline Silicon Mirror

Double-spherically bent crystal scheme of stigmatic x ray monochromatic backlit imaging

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