Refraction and ultra-small-angle scattering of X-rays in a single-crystal diamond compound refractive lens

Gasilov, S. V.; Mittone, Alberto; Rolo, Tomy dos Santos; Polyakov, S. N.; Zholudev, S. I.; Terentyev, Sergey; Бланк, В. Д.; Bravin, A.; Baumbach, Tilo

doi:10.1107/s1600577517012772

Cited by 9 publications

(6 citation statements)

References 26 publications

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“…Moreover, the lens material should generate the lowest intensity of background scattering. The intensity of the background signal observed in the tails of the focused beam (Gasilov et al, 2017;Chubar et al, 2020) is mainly caused by SAXS (Guinier, 1939;Glatter & Kratky, 1982), which is primarily due to electron density fluctuations in the scattering volume. The microstructure of the lens material can be either (i) single crystalline like in the diamond lenses presented here, (ii) polycrystalline [for Be lenses (Roth et al, 2014)] or (iii) amorphous [e.g.…”

Section: Small-angle X-ray Scatteringmentioning

confidence: 99%

Polished diamond X-ray lenses

Celestre¹,

Antipov²,

Gómez³

et al. 2022

J Synchrotron Radiat

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High-quality bi-concave 2D focusing diamond X-ray lenses of apex-radius R = 100 µm produced via laser-ablation and improved via mechanical polishing are presented here. Both for polished and unpolished individual lenses and for stacks of ten lenses, the remaining figure errors determined using X-ray speckle tracking are shown and these results are compared with those of commercial R = 50 µm beryllium lenses that have similar focusing strength and physical aperture. For two stacks of ten diamond lenses (polished and unpolished) and a stack of eleven beryllium lenses, this paper presents measured 2D beam profiles out of focus and wire scans to obtain the beam size in the focal plane. These results are complemented with small-angle X-ray scattering (SAXS) measurements of a polished and an unpolished diamond lens. Again, this is compared with the SAXS of a beryllium lens. The polished X-ray lenses show similar figure errors to commercially available beryllium lenses. While the beam size in the focal plane is comparable to that of the beryllium lenses, the SAXS signal of the polished diamond lenses is considerably lower.

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Section: Small-angle X-ray Scatteringmentioning

confidence: 99%

Polished diamond X-ray lenses

Celestre¹,

Antipov²,

Gómez³

et al. 2022

J Synchrotron Radiat

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“…The white filtered beam introduces chromatic aberration, which however is not larger than the imaged source, such that visibility can be largely preserved. As a test object, a diamond parabolic X-ray lens (TISNCM Troisk, Russia) was chosen due to a smooth phase gradient and earlier metrology on it (Gasilov et al, 2017;dos Santos Rolo et al, 2018). That object, as a standard test benchmark in our imaging experiments, allows us to compare new data with previous results (Mikhaylov et al, 2019).…”

Section: Figurementioning

confidence: 99%

“…The Technological Institute for Superhard and Novel Carbon Materials (TISNCM) in Troitsk, Russia, manufactured the diamond parabolic X-ray lens for this and previous experiments. Nominal dimensions of the diamond lens are: radius of parabola apex, R = 200 mm; geometrical aperture, A = 900 mm; thickness, H = 500 mm (Gasilov et al, 2017). The diamond lens (DL) has been placed in between the SHSX and the detector.…”

Section: Figurementioning

confidence: 99%

Shack–Hartmann wavefront sensors based on 2D refractive lens arrays and super-resolution multi-contrast X-ray imaging

Mikhaylov

Reich

Zakharova

et al. 2020

J Synchrotron Radiat

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Different approaches of 2D lens arrays as Shack–Hartmann sensors for hard X-rays are compared. For the first time, a combination of Shack–Hartmann sensors for hard X-rays (SHSX) with a super-resolution imaging approach to perform multi-contrast imaging is demonstrated. A diamond lens is employed as a well known test object. The interleaving approach has great potential to overcome the 2D lens array limitation given by the two-photon polymerization lithography. Finally, the radiation damage induced by continuous exposure of an SHSX prototype with a white beam was studied showing a good performance of several hours. The shape modification and influence in the final image quality are presented.

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“…To verify the accuracy of the performed phase front metrology, the deflection of the X-rays introduced by the diamond CRL was derived independently from a microtomography (CT) with the CT rotation axis coinciding with the CRL optical axis [45]. The reconstructed distribution of material density was subjected to a segmentation procedure in order to outline the surfaces of the diamond.…”

Section: Reconstruction Of the Phase Shift Of A Diamond Lensmentioning

confidence: 99%

A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays

et al. 2018

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An array of compound refractive X-ray lenses (CRL) with 20 × 20 lenslets, a focal distance of 20 cm and a visibility of 0.93 is presented. It can be used as a Shack-Hartmann sensor for hard X-rays (SHARX) for wavefront sensing and permits for true single-shot multi-contrast imaging the dynamics of materials with a spatial resolution in the micrometer range, sensitivity on nanosized structures and temporal resolution on the microsecond scale. The object's absorption and its induced wavefront shift can be assessed simultaneously together with information from diffraction channels. In contrast to the established Hartmann sensors the SHARX has an increased flux efficiency through focusing of the beam rather than blocking parts of it. We investigated the spatiotemporal behavior of a cavitation bubble induced by laser pulses. Furthermore, we validated the SHARX by measuring refraction angles of a single diamond CRL, where we obtained an angular resolution better than 4 µrad.

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Refraction and ultra-small-angle scattering of X-rays in a single-crystal diamond compound refractive lens

Cited by 9 publications

References 26 publications

Polished diamond X-ray lenses

Polished diamond X-ray lenses

Shack–Hartmann wavefront sensors based on 2D refractive lens arrays and super-resolution multi-contrast X-ray imaging

A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays

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