%0 Journal Article
%A Stoupin, S.
%A Shvyd’ko, Y. V.
%A Shu, D.
%A Blank, V. D.
%A Terentyev, S. A.
%A Polyakov, S. N.
%A Kuznetsov, M. S.
%A Lemesh, I.
%A Mundboth, K.
%A Collins, S. P.
%A Sutter, J. P.
%A Tolkiehn, M.
%T Hybrid diamond-silicon angular-dispersive x-ray monochromator with 025-meV energy bandwidth and high spectral efficiency
%J Optics express
%V 21
%N 25
%@ 1094-4087
%C Washington, DC
%I Soc.
%M DESY-2014-01774
%P 30932-30946
%D 2013
%X We report on the design, implementation, and performance of an x-ray monochromator with ultra-high energy resolution (ΔE/E ≃ 2.7 × 10−8) and high spectral efficiency using x rays with photon energies E ≃ 9.13 keV. The operating principle of the monochromator is based on the phenomenon of angular dispersion in Bragg back-diffraction. The optical scheme of the monochromator is a modification of a scheme reported earlier [Shvyd’ko et al., Phys. Rev. A 84, 053823 (2011)], where a collimator/wavelength selector Si crystal was replaced with a 100-μm-thick type IIa diamond crystal. This modification provides a very-small-energy bandwidth ΔE ≃ 0.25 meV, a 3-fold increase in the aperture of the accepted beam, a reduction in the cumulative angular dispersion rate of x rays emanating from the monochromator for better focusing on a sample, a sufficient angular acceptance matching the angular divergence of an undulator source (≈ 10 μrad), and an improved throughput due to low x-ray absorption in the thin diamond crystal. The measured spectral efficiency of the monochromator was ≈ 65
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000328575700075
%$ pmid:24514666
%R 10.1364/OE.21.030932
%U https://bib-pubdb1.desy.de/record/167422