Towards kilohertz synchrotron coherent diffractive imaging

Gerard N Hinsley; Cameron M Kewish; Grant A van Riessen

doi:10.1107/S1600576722003466

Towards kilohertz synchrotron coherent diffractive imaging

J Appl Crystallogr. 2022 May 8;55(Pt 3):479-483. doi: 10.1107/S1600576722003466. eCollection 2022 Jun 1.

Authors

Gerard N Hinsley¹, Cameron M Kewish^{1

2}, Grant A van Riessen^{1

3}

Affiliations

¹ Department of Mathematical and Physical Sciences, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bundoora, Victoria 3086, Australia.
² Australian Nuclear Science and Technology Organisation, Australian Synchrotron, Victoria 3168, Australia.
³ Melbourne Centre for Nanofabrication, Clayton, Victoria 3168, Australia.

Abstract

X-ray coherent diffractive imaging (CDI) techniques have been applied with widespread impact to study nanoscale material properties. New fast framing detectors may reveal dynamics that occur at millisecond timescales. This work demonstrates by simulation that kilohertz synchrotron CDI is possible, by making use of redundant information from static parts of the image field. Reconstruction ambiguities are strongly suppressed by applying a spatio-temporal constraint, obviating the need for slower methods of introducing diversity such as ptychography. The relationship between image fidelity and time resolution is investigated and shows that dynamics an order of magnitude faster can be reconstructed, compared with conventional CDI.

Keywords: coherent X-ray imaging; coherent diffractive imaging; kHz X-ray imaging; nanoscale dynamics; phase retrieval.