High-resolution high-efficiency X-ray imaging system based on the in-line Bragg magnifier and the Medipix detector

0391972 - FZÚ 2014 RIV DK eng J - Journal Article
Vagovič, P. - Korytár, D. - Cecilia, A. - Hamann, E. - Švéda, L. - Pelliccia, D. - Hartwig, J. - Zápražný, Z. - Oberta, Peter - Dolbnya, I. - Shawney, K. - Flechsig, U. - Fiederle, M. - Baumbach, T.
High-resolution high-efficiency X-ray imaging system based on the in-line Bragg magnifier and the Medipix detector.
Journal of Synchrotron Radiation. Roč. 20, č. 1 (2013), s. 153-159. ISSN 0909-0495. E-ISSN 1600-5775.
[International Workshop on X-Ray Damage to Biological Crystalline Samples /7./. Oxfordshire, 14.03.2012-16.03.2012]
R&D Projects: GA MPO FR-TI1/412
Institutional support: RVO:68378271
Keywords : Bragg magnifie * germanium * holography * high resolution * in-line * X-ray imaging
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 3.022, year: 2013
http://onlinelibrary.wiley.com/doi/10.1107/S0909049512044366/pdf

The performance of a recently developed full-field X-ray micro-imaging system based on an in-line Bragg magnifier is reported. The system is composed of quasi-channel-cut crystals in combination with a Medipix single-photoncounting detector. A theoretical and experimental study of the imaging performance of the crystals–detector combination and a comparison with a standard indirect detector typically used in high-resolution X-ray imaging schemes are reported. The spatial resolution attained by our system is about 0.75 mm, limited only by the current magnification. Compared with an indirect detector system, this system features a better efficiency, signal-to-noise ratio and spatial resolution. The optimal working resolution range of this system is between 0.4 mm and 1 mm, filling the gap between transmission X-ray microscopes and indirect detectors. Applications for coherent full-field imaging of weakly absorbing samples are shown and discussed.
Permanent Link: http://hdl.handle.net/11104/0220966