Highly porous nanoberyllium for X-ray beam speckle suppression

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 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.

Beryllium Materials and Their Application in Energetics of Future

“…By applying porous nanoberyllium products, devices for removing X-ray image artifacts in X-ray optics were made [1,13]. The use of such devices (speckle suppressors) with porous beryllium allows to manage coherence and gets images without speckles that are interference patterns formed by mutual interference of coherent waves having either or both random phase shifts and a random set of intensities and (Table 2) with the content of 3.28-8.21% wt beryllium-foam; ▴ -samples from mixture 4 ( Table 2) with the content of 7.93% wt beryllium-foam.…”

“…The device containing a 4 mm thick paten of porous nanoberryillium was tested at the Micro Optics Test Bench on the ID06 beamline of the European Synchrotron Radiation Source (ESRF) with a view to demonstrate the speckle-reduction effect [13].…”

Experimental investigation of Gaussian random phase screen model for x-ray diffusers

“…Another important application of diffusers is in the deliberate creation of speckles for X-ray Speckle tracking techniques [1][2][3]. A diffuser typically consists of some short-range ordered material, such as paper, a piece of wood [4], nano-porous beryllium [5] or carbon [6,7], and sveral others [8][9][10].…”

The Small-angle X-Ray Scattering Investigation of Advanced Beryllium Materials

“…It is known that the solid dense beryllium has a relatively low scattering and absorption of X-rays in the range of low energies. For example the absorption of the 1 mm nanoberyllium plate is about 1% at 12 keV [3]. The use of speckle-suppressor with porous beryllium makes it possible to significantly increase the scattering and thus to destroy the beam coherence and to supress image speckles.…”

“…Beryllium is one of the most important MIE-2017 materials for X-ray optics, in particular, for refractive lenses. It is also promising for manufacturing various X-ray filters, especially speckle-suppressors [3,4], which are produced from ultradisperse materials that allow to diffuse x-ray radiation and obtain images without speckles. Such ultra disperse materials, e.g.…”