High-speed free-run ptychography at the Australian Synchrotron
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Date
2022-03
Journal Title
Journal ISSN
Volume Title
Publisher
International Union of Crystallography
Abstract
Over the last decade ptychography has progressed rapidly from a specialist ultramicroscopy technique into a mature method accessible to non-expert users. However, to improve scientific value ptychography data must reconstruct reliably, with high image quality and at no cost to other correlative methods. Presented here is the implementation of high-speed ptychography used at the Australian Synchrotron on the XFM beamline, which includes a free-run data collection mode where dead time is eliminated and the scan time is optimized. It is shown that free-run data collection is viable for fast and high-quality ptychography by demonstrating extremely high data rate acquisition covering areas up to 352 000 μm2 at up to 140 μm2 s-1, with 13x spatial resolution enhancement compared with the beam size. With these improvements, ptychography at velocities up to 250 μm s-1 is approaching speeds compatible with fast-scanning X-ray fluorescence microscopy. The combination of these methods provides morphological context for elemental and chemical information, enabling unique scientific outcomes. © The Authors - Open Access CC-By Licence
Description
Synchrotron data were collected on the XFM beamline of the Australian Synchrotron, part of ANSTO. Andreas Moll and Ron Bosworth from ANSTO are acknowledged for providing a high-performance computing test platform and for stimulating discussions about the XFM beamline cluster implementation. Robin Kirkham and Chris Ryan from CSIRO are acknowledged for helpful discussions regarding the Maia data stream, and for including stage events that make fast and accurate ptychography frame registration possible. Brian Abbey from La Trobe University is acknowledged for helpful discussions and for providing funding for early development of the data analysis pipeline. David Paterson and Daryl Howard from ANSTO are acknowledged for assistance with XFM commissioning experiments. Stephen Mudie from ANSTO is acknowledged for assistance with integrating the EPICS area-detector software developed by Mark Rivers at Argonne National Laboratory. Bjoern Enders and the PtyPy development community are acknowledged for implementation assistance and continuous effort in software improvements.
Keywords
ANSTO, X-ray fluorescence analysis, X-ray diffraction, Images, Algorithms, Beams, Spatial resolution, Microscopy
Citation
Jones, M. W. M., van Riessen, G. A., Phillips, N. W., Schrank, C. E., Hinsley, G. N., Afshar, N., Reinhardt, J., de Jonge, M. D., & Kewish, C. M. (2022). High-speed free-run ptychography at the Australian Synchrotron. Journal of Synchrotron Radiation, 29(2), 480-487. doi:10.1107/S1600577521012856