Tests and characterization of a laterally graded multilayer Montel mirror

Mundboth, K.; Sutter, John P.; Laundy, D.; Collins, Stephen P.; Stoupin, Stanislav; Shvyd’ko, Yuri

doi:10.1107/s1600577513024077

Cited by 17 publications

(15 citation statements)

References 20 publications

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“…Laterally graded multilayer Montel mirrors recently proved to be useful exactly in this role [14,21].…”

Section: Appendix C: Focusing and Collimating Opticsmentioning

confidence: 99%

X-ray Echo Spectroscopy

Shvyd’ko

2016

Phys. Rev. Lett.

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X-ray echo spectroscopy, a counterpart of neutron spin-echo, is being introduced here to overcome limitations in spectral resolution and weak signals of the traditional inelastic x-ray scattering (IXS) probes. An image of a point-like x-ray source is defocused by a dispersing system comprised of asymmetrically cut specially arranged Bragg diffracting crystals. The defocused image is refocused into a point (echo) in a time-reversal dispersing system. If the defocused beam is inelastically scattered from a sample, the echo signal acquires a spatial distribution, which is a map of the inelastic scattering spectrum. The spectral resolution of the echo spectroscopy does not rely on the monochromaticity of the x-rays, ensuring strong signals along with a very high spectral resolution. Particular schemes of x-ray echo spectrometers for 0.1-0.02-meV ultra-high-resolution IXS applications (resolving power > 10 8 ) with broadband 5-13 meV dispersing systems are introduced featuring more than 10 3 signal enhancement. The technique is general, applicable in different photon frequency domains.

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“…Laterally graded multilayer Montel mirrors recently proved to be useful exactly in this role [14,21].…”

Section: Appendix C: Focusing and Collimating Opticsmentioning

confidence: 99%

X-ray Echo Spectroscopy

Shvyd’ko

2016

Phys. Rev. Lett.

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“…The initial CDW design had been tested24252627 and improved by implementing doubly-dispersive CDFDW222829 and CDDW optics23. A Montel-type two-dimensional (2D) mirror system was designed and tested to work as the large-acceptance angle collimating optics30.…”

Section: Resultsmentioning

confidence: 99%

“…A Montel-type 2D mirror system was used as the collimating optics30. As predicted, the Montel optics collected X-rays in a solid angle Δ ϕ x × Δ ϕ y ≲10 × 10 mrad 2 and collimated them to a beam with a much smaller divergence Δ ψ x × Δ ψ y ≲90(V) × 230(H) μrad 2 .…”

Section: Discussionmentioning

confidence: 99%

“…The collimating Montel optics, manufactured by Incoatec GmbH, consisted of two parabolically shaped, 120-mm-long surfaces coated with laterally graded 100 W–C bilayers (Göbel mirrors), arranged perpendicularly and side-by-side30. An almost 50% reflectivity of the Montel optics (≃70% from each surface) was measured with the analyser system set at ϕ y =0 looking into the direct focused beam.…”

Section: Discussionmentioning

confidence: 99%

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High-contrast sub-millivolt inelastic X-ray scattering for nano- and mesoscale science

et al. 2014

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Photon and neutron inelastic scattering spectrometers are microscopes for imaging condensed matter dynamics on very small length and time scales. Inelastic X-ray scattering permitted the first quantitative studies of picosecond nanoscale dynamics in disordered systems almost 20 years ago. However, the nature of the liquid-glass transition still remains one of the great unsolved problems in condensed matter physics. It calls for studies at hitherto inaccessible time and length scales, and therefore for substantial improvements in the spectral and momentum resolution of the inelastic X-ray scattering spectrometers along with a major enhancement in spectral contrast. Here we report a conceptually new spectrometer featuring a spectral resolution function with steep, almost Gaussian tails, sub-meV (≃620 μeV) bandwidth and improved momentum resolution. The spectrometer opens up uncharted space on the dynamics landscape. New results are presented on the dynamics of liquid glycerol, in the regime that has become accessible with the novel spectrometer.

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“…We study IXS imaging with different types of focusing elements F 1 and F 2 : ideal lenses, 2D paraboloidal compound refractive lenses [9], 2D paraboloidal mirrors [20], or compound 2D mirror systems composed of 1D parabolic mirrors, such as Kirkpatrick-Baez (KB) [21] or Montel [22]. The mirrors are considered to be coated with laterally graded multilayers similar to those used in [23,24], providing a large glancing angle of incidence ϕ 20 − 30 mrad. Due to the large ϕ, the mirrors are compact, have a large geometrical aperture, and most importantly mitigate aberrations, as discussed in [6].…”

Section: From Sample To Detector: Refocusing Systemmentioning

confidence: 99%

Aberration-free imaging of inelastic-scattering spectra with x-ray echo spectrometers

Río

Shvyd’ko

2019

Phys. Rev. A

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We study conditions for aberration-free imaging of inelastic x-ray scattering (IXS) spectra with x-ray echo spectrometers. Aberration-free imaging is essential for achieving instrumental functions with high resolution and high contrast. Computational ray tracing is applied to a thorough analysis of a 0.1-meV/0.07-nm −1 -resolution echo-type IXS spectrometer operating with 9-keV x-rays. We show that IXS spectra imaged by the x-ray echo spectrometer that uses lenses for the collimating and focusing optics are free of aberrations. When grazing-incidence mirrors (paraboloidal, parabolic Kirkpatrick-Baez, or parabolic Montel) are used instead of the lenses, the imaging system reveals some defocus aberration that depends on the inelastic energy transfer. However, the aberrationfree images can be still recorded in a plane that is tilted with respect to the optical axis. This distortion can be thus fully compensated by inclining appropriately the x-ray imaging detector, which simultaneously improves its spatial resolution. A full simulation of imaging IXS spectra from a realistic sample demonstrates the excellent performance of the proposed designs.

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Tests and characterization of a laterally graded multilayer Montel mirror

Cited by 17 publications

References 20 publications

X-ray Echo Spectroscopy

X-ray Echo Spectroscopy

High-contrast sub-millivolt inelastic X-ray scattering for nano- and mesoscale science

Aberration-free imaging of inelastic-scattering spectra with x-ray echo spectrometers

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