Grid-enhanced X-ray coded aperture microscopy with polycapillary optics
Autor: | Katarzyna M. Sowa, Arndt Last, Paweł Korecki |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
Microscopy
Multidisciplinary Materials science Fabrication business.industry Resolution (electron density) X-ray 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Article Optics 0103 physical sciences Coded aperture ddc:620 010306 general physics 0210 nano-technology business Focus (optics) Absorption (electromagnetic radiation) Engineering & allied operations |
Zdroj: | Scientific Reports Scientific reports, 7, Art.Nr.: 44944 |
ISSN: | 2045-2322 |
Popis: | Polycapillary devices focus X-rays by means of multiple reflections of X-rays in arrays of bent glass capillaries. The size of the focal spot (typically 10–100 μm) limits the resolution of scanning, absorption and phase-contrast X-ray imaging using these devices. At the expense of a moderate resolution, polycapillary elements provide high intensity and are frequently used for X-ray micro-imaging with both synchrotrons and X-ray tubes. Recent studies have shown that the internal microstructure of such an optics can be used as a coded aperture that encodes high-resolution information about objects located inside the focal spot. However, further improvements to this variant of X-ray microscopy will require the challenging fabrication of tailored devices with a well-defined capillary microstructure. Here, we show that submicron coded aperture microscopy can be realized using a periodic grid that is placed at the output surface of a polycapillary optics. Grid-enhanced X-ray coded aperture microscopy with polycapillary optics does not rely on the specific microstructure of the optics but rather takes advantage only of its focusing properties. Hence, submicron X-ray imaging can be realized with standard polycapillary devices and existing set-ups for micro X-ray fluorescence spectroscopy. |
Databáze: | OpenAIRE |
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