High Resolution 1D and 2D Crystal Optics Based on Asymmetric Diffractors

Korytár, D.; Ferrari, C.; Mikulı́k, Petr; Germini, F.; Vagovič, Patrik; Baumbach, Tilo

doi:10.1007/978-3-540-74561-7_29

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…The final resolution of the complete system can be affected by other parameters, for example the penetration or the information depth and geometry used, source size and the sample-to-magnifier distance. The penetration depth z e , or in the case of crystal optics it is better to speak about the information depth z inf , is defined as the perpendicular distance from the surface when input radiation and output radiation is attenuated by the factor 1/e (Korytá r et al, 2008). The geometrical blur l B of the pencil beam penetrating the crystal up to the information depth can be estimated as…”

Section: Figurementioning

confidence: 99%

In-line Bragg magnifier based on V-shaped germanium crystals

Vagovič

Korytár

Mikulı́k

et al. 2011

J Synchrotron Radiat

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In this work an X-ray imaging system based on a recently developed in-line two-dimensional Bragg magnifier composed of two monolithic V-shaped crystals made of dislocation-free germanium is presented. The channel-cut crystals were used in one-dimensional and in two-dimensional (crossed) configurations in imaging applications and allowed measurement of phase-contrast radiograms both in the edge-enhanced and in the holographic regimes. The measurement of the phase gradient in two orthogonal directions is demonstrated. The effective pixel size attained was 0.17 µm in the one-dimensional configuration and 0.5 µm in the two-dimensional setting, offering a twofold improvement in spatial resolution over devices based on silicon. These results show the potential for applying Bragg magnifiers to imaging soft matter at high resolution with reduced dose owing to the higher efficiency of Ge compared with Si.

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Section: Figurementioning

confidence: 99%