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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| Vydané v: | Optics express Ročník 28; číslo 20; s. 29590 - 29618 |
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| Hlavní autori: | , , , , |
| Médium: | Journal Article |
| Jazyk: | English |
| Vydavateľské údaje: |
United States
Optical Society of America (OSA)
28.09.2020
Optical Society of America |
| Predmet: | |
| ISSN: | 1094-4087, 1094-4087 |
| On-line prístup: | Získať plný text |
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| Shrnutí: | 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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| Bibliografia: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 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 |