In-line Bragg magnifier based on V-shaped germanium crystals
| Autor: | 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 |
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| Rok vydání: | 2011 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Silicon Holography Physics::Optics chemistry.chemical_element X-ray optics Germanium 02 engineering and technology 01 natural sciences law.invention Optics law 0103 physical sciences Soft matter Instrumentation Image resolution 010302 applied physics Radiation business.industry Bragg magnifier phase-contrast imaging channel-cut crystal in-line configuration Phase-contrast imaging 021001 nanoscience & nanotechnology chemistry X-ray crystallography Optoelectronics 0210 nano-technology business |
| Zdroj: | 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 |
| ISSN: | 1600-5775 0909-0495 |
| DOI: | 10.1107/s090904951102989x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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