X-ray coherent diffraction imaging with an objective lens: Towards three-dimensional mapping of thick polycrystals
We demonstrate an x-ray coherent imaging method that combines high spatial resolution with the ability to map grains within thick polycrystalline specimens. An x-ray objective serves to isolate an embedded grain. Iterative oversampling routines and Fourier synthesis are used to reconstruct the shape...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033031 |
| Summary: | We demonstrate an x-ray coherent imaging method that combines high spatial resolution with the ability to map grains within thick polycrystalline specimens. An x-ray objective serves to isolate an embedded grain. Iterative oversampling routines and Fourier synthesis are used to reconstruct the shape and strain field from the far-field intensity pattern. In a demonstration experiment a ∼500-nm Pt grain embedded in a polycrystalline Pt matrix is mapped in three dimensions without compromising the spatial resolution. No information on the pupil function of the lens is required and lens aberrations are not critical. |
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| ISSN: | 2643-1564 |