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

Authors :
Angelica Cecilia
Tilo Baumbach
Petr Mikulík
Daniel Hänschke
Dušan Korytár
Claudio Ferrari
Patrik Vagovic
Michael Fiederle
E. Hamann
Tamzin A. Lafford
Daniele Pelliccia
Yang Yang
Source :
Journal of synchrotron radiation 18 (2011): 753–760. doi:10.1107/S090904951102989X, info:cnr-pdr/source/autori:Patrik Vagovic, Dusan Korytar, Petr Mikulik, Angelica Cecilia, Claudio Ferrari, Yang Yang, Daniel Haenschke, Elias Hamann, Daniele Pelliccia, Tamzin Laford, Michael Fiederle and Tilo Baumbach/titolo:In-line Bragg magnifier based on V-shaped germanium crystals/doi:10.1107%2FS090904951102989X/rivista:Journal of synchrotron radiation/anno:2011/pagina_da:753/pagina_a:760/intervallo_pagine:753–760/volume:18
Publication Year :
2011
Publisher :
International Union of Crystallography (IUCr), 2011.

Abstract

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 mu m in the one-dimensional configuration and 0.5 mu m 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.

Details

ISSN :
16005775 and 09090495
Volume :
18
Database :
OpenAIRE
Journal :
Journal of Synchrotron Radiation
Accession number :
edsair.doi.dedup.....efd2f79a11a493b09f7e18f6b9d913ba
Full Text :
https://doi.org/10.1107/s090904951102989x