Highly porous nanoberyllium for X-ray beam speckle suppression

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Abstract

This paper reports a special device called a 'speckle suppressor', which contains a highly porous nanoberyllium plate squeezed between two beryllium windows. The insertion of the speckle suppressor in an X-ray beam allows manipulation of the spatial coherence length, thus changing the effective source size and removing the undesirable speckle structure in X-ray imaging experiments almost without beam attenuation. The absorption of the nanoberyllium plate is below 1% for 1mm thickness at 12keV. The speckle suppressor was tested on the ID06 ESRF beamline with X-rays in the energy range from 9 to 15keV. It was applied for the transformation of the phase-amplitude contrast to the pure amplitude contrast in full-field microscopy.

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Goikhman, A., Lyatun, I., Ershov, P., Snigireva, I., Wojda, P., Gorlevsky, V., … Snigirev, A. (2015). Highly porous nanoberyllium for X-ray beam speckle suppression. Journal of Synchrotron Radiation, 22, 796–800. https://doi.org/10.1107/S1600577515003628

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