11 December 1998 Focusing properties of mosaic crystals
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X-ray instruments with mosaic crystals are proposed and used in many applications in synchrotron radiation, medical physics and astrophysics. These crystals present a parafocusing of the x-ray beam in the diffraction plane, which is thoroughly analyzed in this paper. We studied the evolution of the cross- section of the diffracted beam, using several samples of Highly Oriented Pyrolythic Graphite crystals coming from different suppliers. The experiment has been performed at the European Synchrotron Radiation Facility (beamline BM5). The results clearly show a parafocusing effect in the 1:1 magnification ratio along the diffraction plane and a defocusing effect along the perpendicular plane. The secondary extinction coefficient is also measured.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Manuel Sanchez del Rio, Manuel Sanchez del Rio, Mauro Gambaccini, Mauro Gambaccini, Giovanni Pareschi, Giovanni Pareschi, Angelo Taibi, Angelo Taibi, Alessandra Tuffanelli, Alessandra Tuffanelli, Andreas K. Freund, Andreas K. Freund, } "Focusing properties of mosaic crystals", Proc. SPIE 3448, Crystal and Multilayer Optics, (11 December 1998); doi: 10.1117/12.332512; https://doi.org/10.1117/12.332512

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