Highly porous nanoberyllium for X-ray beam speckle suppression

Alexander Goikhman (1) , Ivan Lyatun (1) , Petr Ershov (1) , Irina Snigireva (2) , Pawel Wojda (3, 1) , Vladimir Gorlevsky (4) , Alexander Semenov (4) , Maksim Sheverdyaev (4) , Viktor Koletskiy (4) , Anatoly Snigirev (1, 2)

1 IKBFU - Immanuel Kant Baltic Federal University
2 ESRF - European Synchrotron Radiation Facility
3 GUT - Gdańsk University of Technology
4 AA Bochvar High Technol Sci Res Inst Inorgan Mat, Moscow 123098, Russia

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 1 mm thickness at 12 keV. The speckle suppressor was tested on the ID06 ESRF beamline with X-rays in the energy range from 9 to 15 keV. It was applied for the transformation of the phase-amplitude contrast to the pure amplitude contrast in full-field microscopy

Mots clés: X-ray imaging; X-ray microscopy; X-ray speckle; porous nanoberyllium

Domaines: Physique [physics]

Alexander Goikhman, Ivan Lyatun, Petr Ershov, Irina Snigireva, Pawel Wojda, et al.. Highly porous nanoberyllium for X-ray beam speckle suppression. Journal of Synchrotron Radiation, 2015, 22, pp.796-800. ⟨10.1107/S1600577515003628⟩. ⟨hal-01572882⟩