%0 Journal Article %T Single-shot spatial coherence characterization of x-ray ultrafast sources %+ Attophysique (ATTO) %+ Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN) %A Duarte, Joana %A Gonzalez, Aura Inés %A Cassin, Rémy %A Nicolas, Rana %A Kholodstova, Maria %A Boutu, Willem %A Fajardo, Marta %A Hamed, Merdji %< avec comité de lecture %@ 0146-9592 %J Optics Letters %I Optical Society of America - OSA Publishing %V 46 %N 7 %P 1764 %8 2021 %D 2021 %R 10.1364/OL.413643 %Z Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] %Z Physics [physics]Journal articles %X Spatial coherence is an impactful source parameter in many applications ranging from atomic and molecular physics tometrology or imaging. In lensless imaging, for example, it can strongly affect the image formation, especially when thesource exhibits shot-to-shot variations. Single-shot characterization of the spatial coherence length of a source is thuscrucial. However, current techniques require either parallel intensity measurements or the use of several masks. Basedon the method proposed by González et al. [J. Opt. Soc. Am. A 28, 1107 (2011)], we designed a specific arrangement of atwo-dimensional non-redundant array of apertures, which allows, through its far field interference pattern, for a singleshot measurement of the spatial coherence, while being robust against beam-pointing instabilities. The strategicconfiguration of the pinholes allows us to disentangle the degree of spatial coherence from the intensity distribution,thus removing the need for parallel measurement of the beam intensity. An experimental validation is performedusing a high-harmonic source. A statistical study in different regimes shows the robustness of the method. %G English %L cea-03187569 %U https://cea.hal.science/cea-03187569 %~ CEA %~ CNRS %~ IRAMIS-LIDYL %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ TEST-HALCNRS %~ UNIVERSITE-PARIS-SACLAY %~ ANR %~ GS-ENGINEERING %~ IRAMIS %~ GS-CHIMIE %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE