Journal Article

DESY-2014-01774

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hybrid diamond-silicon angular-dispersive x-ray monochromator with 025-meV energy bandwidth and high spectral efficiency

Stoupin, S. (Corresponding author)Extern* ; Shvyd’ko, Y. V. ; Shu, D. ; Blank, V. D. ; Terentyev, S. A. ; Polyakov, S. N. ; Kuznetsov, M. S. ; Lemesh, I. ; Mundboth, K. ; Collins, S. P. ; Sutter, J. P. ; Tolkiehn, M.DESY*

2013
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1364/OE.21.030932

Abstract: 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% with an aperture of 0.3 × 1 mm2. The performance parameters of the monochromator are suitable for inelastic x-ray spectroscopy with an absolute energy resolution ΔE < 1 meV.

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Contributing Institute(s):

1. PETRA III Extension (FS-PEX)
2. DOOR-User (DOOR)

Research Program(s):

1. FS In-house research / external facilities (POF2-544) (POF2-544)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2013

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Database coverage:
; ; ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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