TY  - JOUR
AU  - Stoupin, S.
AU  - Shvyd’ko, Y. V.
AU  - Shu, D.
AU  - Blank, V. D.
AU  - Terentyev, S. A.
AU  - Polyakov, S. N.
AU  - Kuznetsov, M. S.
AU  - Lemesh, I.
AU  - Mundboth, K.
AU  - Collins, S. P.
AU  - Sutter, J. P.
AU  - Tolkiehn, M.
TI  - Hybrid diamond-silicon angular-dispersive x-ray monochromator with 025-meV energy bandwidth and high spectral efficiency
JO  - Optics express
VL  - 21
IS  - 25
SN  - 1094-4087
CY  - Washington, DC
PB  - Soc.
M1  - DESY-2014-01774
SP  - 30932-30946
PY  - 2013
AB  - 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
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000328575700075
C6  - pmid:24514666
DO  - DOI:10.1364/OE.21.030932
UR  - https://bib-pubdb1.desy.de/record/167422
ER  -