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Figure 2
Schematics and theoretical spectral profiles of the angular dispersive spectrograph. (a) Optical scheme shown in the diffraction (y, z) plane with X-ray source S, focusing element F, double-crystal dispersing element D composed of crystals C1 and C2, and X-ray imager I. Crystal C440 is a spectral resolution probe; see panel (d). (b)–(b′) Equivalent unfolded optical schemes in the (y, z) diffraction (b) and (x, z) sagittal (b′) planes. (c)–(e) Theoretical spectral profiles of X-rays passing through (c) crystals C1–C2; (d) a spectral resolution probe — a narrow-band diamond Bragg back-reflecting crystal C440; and (e) through both C440 and C1–C2. See text for details.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 4| July 2025| Pages 861-872
https://doi.org/10.1107/S1600577525004278
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