Partial Coherence: a Route to Performing Faster Coherent Diffraction Imaging

11th International Conference on X-ray Microscopy

Chen, Bo^1,2 ; Abbey, Brian^1,3,4 ; Dilanian, Ruben^1,2 ; Balaur, Eugeniu^1,3 ; Riessen, Grant Van^1,3 ; Junker, Mark^1,3 ; Tran, Chanh Q.^1,3 ; Jones, Michael W. M.^1,3 ; McNulty, Ian^5 ; Vine, David J.^5 ; Putkunz, Corey T.^1,2 ; Quiney, Harry M.^1,2 ; Nugent, Keith A.^1,2,6

Australian Research Council Centre of Excellence for Coherent X-ray Science (CXS), VIC, Australia^1

School of Physics, University of Melbourne, VIC 3010, Australia^2

Department of Physics, La Trobe University, VIC 3086, Australia^3

Melbourne Centre for Nanofabrication, 151 Wellington Road Clayton, VIC 3168, Australia^4

Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States^5

Australian Synchrotron, 800 Blackburn Rd, Clayton, VIC. 3168, Australia^6

关键词: Beam fluxes;    Beam-lines;    Coherent diffraction imaging;    Coherent sources;    Exposure-time;    Orders of magnitude;    Partial coherence;    Reconstruction algorithms;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/463/1/012033/pdf
DOI  :  10.1088/1742-6596/463/1/012033

来源: IOP

【 摘 要 】

Coherent diffraction imaging (CDI) typically requires that the light source should be highly coherent both laterally and longitudinally. Beamlines at synchrotrons usually install a monochromator and slits to achieve a highly coherent source, leading to a large reduction of beam flux. We demonstrate that lateral and longitudinal partial coherence can be successfully included in a CDI reconstruction algorithm simultaneously, reducing the associated exposure time by two orders of magnitude. For the experimental case we present this allows the acquisition of CDI data in just 5 seconds compared to 20 minutes for full coherence. This significantly reduces the requirements on the stability of the imaging system as well as providing a route to imaging samples in real-time.