ArticleJournal of applied crystallography2026
Shot-noise-limited X-ray powder diffraction from organic crystals with laser-driven femtosecond X-ray source.
Article in Journal of applied crystallography, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Laser-driven X-ray sources are increasingly used to investigate the transient behaviour of optically excited materials. While their application to thin films and powders of radiation-hard samples has been extensively explored, their use for radiation-sensitive materials such as organic and protein crystals remains limited. A key challenge is the low signal-to-noise (S/N) ratio, caused by the inherently low flux of these sources and additional non-Poissonian noise arising from temporal fluctuations. Improving noise suppression and enhancing the S/N ratio are therefore critical steps toward extending the applicability of these sources to more demanding systems. We demonstrate shot-noise-limited X-ray powder diffraction from 4-phenylazophenol, representing an organic crystal, using a laser-driven plasma X-ray source. These results highlight the potential of such sources for future studies of transient structural dynamics in photo-excited organic crystals.
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