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Proceedings Paper

Focusing properties of mosaic crystals
Author(s): Manuel Sanchez del Rio; Mauro Gambaccini; Giovanni Pareschi; Angelo Taibi; Alessandra Tuffanelli; Andreas K. Freund
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Paper Abstract

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.

Paper Details

Date Published: 11 December 1998
PDF: 10 pages
Proc. SPIE 3448, Crystal and Multilayer Optics, (11 December 1998); doi: 10.1117/12.332512
Show Author Affiliations
Manuel Sanchez del Rio, European Synchrotron Radiation Facility (France)
Mauro Gambaccini, Univ. degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare (Italy)
Giovanni Pareschi, Danish Space Research Institute (Italy)
Angelo Taibi, Univ. degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare (Italy)
Alessandra Tuffanelli, Univ. degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare (Italy)
Andreas K. Freund, European Synchrotron Radiation Facility (France)


Published in SPIE Proceedings Vol. 3448:
Crystal and Multilayer Optics
Albert T. Macrander; Andreas K. Freund; Tetsuya Ishikawa; Dennis M. Mills, Editor(s)

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