Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session W45: Advanced Coherent X-ray Sources
3:00 PM–5:36 PM,
Thursday, March 9, 2023
Room: Room 315
Sponsoring
Unit:
GIMS
Chair: Youli Li, University of California, Santa Barbara
Abstract: W45.00005 : Elucidation of Relaxation Dynamics in Complex Fluids Through AI-informed X-ray Photon Correlation Spectroscopy*
4:12 PM–4:24 PM
Presenter:
James P Horwath
(Argonne National Laboratory)
Authors:
James P Horwath
(Argonne National Laboratory)
Xiao-Min Lin
(Argonne National Laboratory)
Hongrui He
(University of Chicago, Argonne National Laboratory)
Qingteng Zhang
(Argonne National Laboratory)
Eric M Dufresne
(Argonne National Laboratory)
Subramanian K Sankaranarayanan
(University of Illinois, Argonne National)
Wei Chen
(University of Chicago, Argonne National Laboratory)
Suresh Narayanan
(Argonne National Laboratory)
Mathew Cherukara
(Argonne National Laboratory)
We have developed an unsupervised deep autoencoder capable of encoding raw XPCS data into a feature-rich latent representation, which can then be analyzed to elucidate microstructural relaxation dynamics. We test this approach on experimental data describing relaxation in a model complex fluid and show that microstructural dynamics can be directly related to macroscopic property measurements without requiring prior physical knowledge. Additionally, we will discuss how unsupervised learning can be applied in to aid high-throughput experimentation, to detect transient dynamics in real time, and to facilitate physical modeling of relaxation dynamics across timescales.
*This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science user facility and is based on work supported by Laboratory Directed Research and Development (LDRD) funding from Argonne National Laboratory, provided by the Director, Office of Science, of the U.S. DOE under Contract No. DE-AC02-06CH11357.
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