A compact-rigid multi-analyser for energy and angle filtering of high-resolution X-ray experiments. Part 1. Principles and implementation

Prat, A.; Hodeau, J.-L.

doi:10.1107/S160057752201116X

Figure 5
Optimization of the distance D − δD between the source/sample and the Laue mode curved MAD system; for some small δD displacements, representations of the real values (thin colour curves) of the Bragg angles Θ_A, compared with the ideal values (green lines) (calculated for a beam of 7, 20 then 20 keV, arriving on an analyser having a curvature optimized for 9, 10 then 30 keV, respectively). (a) Variation of Bragg angles Θ_A according to different D − δD distances for a 7 keV beam arriving on an analyser having a curvature optimized for 9 keV. (b) Variation of Bragg angles Θ_A for a 20 keV beam arriving on an analyser with a curvature optimized for 10 keV. (c) Variation of Bragg angles Θ_A for a 20 keV beam arriving on an analyser with a curvature optimized for 30 keV. For these three energy ranges (7–9 keV, 10–20 keV and 20–30 keV), close to Cu Kα₁, Mo Kα₁ and Ag Kα₁ laboratory X-ray sources, a small displacement δD (7 mm, −6.5 mm and 1 mm, respectively) widens the accessible angular range of filtering (∼20°, ∼15° or ∼20°, respectively) (dark blue curves).

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 30| Part 1| January 2023| Pages 111-125

https://doi.org/10.1107/S160057752201116X

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