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oai:uvadoc.uva.es:10324/696782024-09-11T19:01:23Zcom_10324_1159com_10324_931com_10324_894col_10324_1310

2024-09-11T08:32:11Z urn:hdl:10324/69678 Referenceless, grating-based, single shot X-ray phase contrast imaging with optimized laser-driven K-α sources Bouffetier, V. Stutman, D. Stoeckl, C. Begishev, I. A. Theobald, W. Filkins, T. Mileham, C. Ceurvorst, L. Klein, S. R. Goudal, T. Casner, A. Valdivia, M. P. Pérez Callejo, Gabriel Física Óptica Producción Científica With its ability to efficiently probe low-Z materials, X-ray phase imaging methods have recently raised high interest in multiple fields from biology and medical applications to high energy density (HED) physics. Initially developed with synchrotron light and X-ray tubes, we present a novel grating based Talbot X-ray deflectometer (TXD) diagnostic that was coupled with laser-generated K-α X-ray sources. The multi-terawatt laser (I > 1 × 1014 W cm-2) was used as a testbed for diagnostic development. It was found that X-ray source chromaticity plays an important role in TXD. Indeed, the broadband spectrum of laser-generated X-ray sources may strongly impact image quality and thus diagnostic performance. We qualified X-ray emission from different laser-produced sources and determined laser, target, and deflectometer parameters that optimize TXD performance. We present the first results of referenceless grating-based X-ray imaging at high-power laser facilities and discuss the implications of this new development in HED research. 2024-09-11T08:32:11Z 2024-09-11T08:32:11Z 2024 info:eu-repo/semantics/article Optics Express, Septiembre 2024, vol. 32, n. 20, p. 34694-34709 1094-4087 https://uvadoc.uva.es/handle/10324/69678 10.1364/OE.516695 34694 20 34709 Optics Express 32 1094-4087 spa info:eu-repo/semantics/openAccess Optica Publishing Group