Comparison of distributed memory algorithms for X-ray wave propagation in inhomogeneous media

Calculations of X-ray wave propagation in large objects are needed for modeling diffractive X-ray optics and for optimization-based approaches to image reconstruction for objects that extend beyond the depth of focus. We describe three methods for calculating wave propagation with large arrays on pa...

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Bibliographic Details
Published in:Optics express Vol. 28; no. 20; pp. 29590 - 29618
Main Authors: Ali, Sajid, Du, Ming, Adams, Mark F., Smith, Barry, Jacobsen, Chris
Format: Journal Article
Language:English
Published: United States Optical Society of America (OSA) 28.09.2020
Optical Society of America
Subjects:
Multislice
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Wave propagation
X-ray optics
ISSN:1094-4087, 1094-4087
Online Access:Get full text
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Summary:Calculations of X-ray wave propagation in large objects are needed for modeling diffractive X-ray optics and for optimization-based approaches to image reconstruction for objects that extend beyond the depth of focus. We describe three methods for calculating wave propagation with large arrays on parallel computing systems with distributed memory: (1) a full-array Fresnel multislice approach, (2) a tiling-based short-distance Fresnel multislice approach, and (3) a finite difference approach. We find that the first approach suffers from internode communication delays when the transverse array size becomes large, while the second and third approaches have similar scaling to large array size problems (with the second approach offering about three times the compute speed).
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content type line 23
AC02-06CH11357
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.400240