Speaker
Description
The applied imaging task gains more and more interests during last few decades in very different scientific fields from medicine to material science. New advanced imaging techniques are continuously developed since the demands for their sensitivity (contrast and spatial resolutions) are constantly rising. It should be noted that the highest sensitivity are usually reached for specific techniques operating in conditions optimised for searching particular structures or elements in particular matrixes which are predetermined from a priori information about samples under investigation (particular location of details, materials of matrix and features, absorption parameters of different details of the sample etc.).
Polycapillary optics using for applied X-ray imaging tasks are widely announced in a number of studies [1]. These optical elements are usually used to enrich photon flux going through the sample, suppress scattered rays, and sometimes to modify spectral distribution of probe X-ray beam. As the channel size of these lenses are crucially lower than the sizes of pixels of available matrix X-ray detectors, imaging studies with them allows obtaining of averaged brightness of a several of capillaries in each particular pixel. In contrast, monocapillary X-ray optics (a bundle on single capillaries) with much higher capillaries size allows registration of X-ray signal from different part of capillary and potentially to obtain difference in X-ray response from parts of investigated samples corresponding to different part of capillaries. The technical difficulty in this case caused by the fact that big size of capillaries limits the maximal energy of X-ray channelling in the monocapillary lens/semilens by a few keV may prevent experimental studies with regular laboratory X-ray sources and in air conditions.
This study reports the first preliminary results on experimental imaging of gold grid made of 20 µm filament with 100 µm period using laboratory X-ray source and monocapilary lens.
References
1. S. Dabagov, Y. P. Gladkikh, Radiat. Phys. Chem. 154 (2019) 3-16.
