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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.<\/jats:p>","DOI":"10.1107\/s1600576726009040","type":"journal-article","created":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T17:26:31Z","timestamp":1788974791000},"page":"1707-1713","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["Shot-noise-limited X-ray powder diffraction from organic crystals with laser-driven femtosecond X-ray source"],"prefix":"10.1107","volume":"59","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-2262-2054","authenticated-orcid":true,"given":"Iuliia","family":"Baranova","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6562-5499","authenticated-orcid":true,"given":"Yelyzaveta","family":"Pulnova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-5379-8876","authenticated-orcid":true,"given":"Roya","family":"Garayeva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0100-9018","authenticated-orcid":true,"given":"Yadu Ram","family":"Panthi","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/032h9wv69","id-type":"ROR","asserted-by":"publisher"}],"department":["Institute of Macromolecular Chemistry"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriel","family":"\u017dold\u00e1k","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0864-8592","authenticated-orcid":true,"given":"Jaroslav","family":"Nejdl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Borislav","family":"Angelov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2563-7169","authenticated-orcid":true,"given":"Filip","family":"Leonarski","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03eh3y714","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jakob","family":"Andreasson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Krishna","family":"Khakurel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2026,9,15]]},"reference":[{"key":"te5168_bb1","doi-asserted-by":"crossref","first-page":"014301","DOI":"10.1063\/1.5126316","volume":"7","author":"Afshari","year":"2020","journal-title":"Struct. 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