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zeige Details Artemiev, N.., Hrdý, J.., ... Sagittal focusing of synchrotron radiation diffracted on the walls of a longitudinal hole drilled into a single-crystal monochromator
in: Journal of synchrotron radiation. - Chester : IUCr, ISSN 1600-5775, Vol. 8, No. 6 (2001), p. 1207-1213
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2001
A very simple method of sagittal focusing of X-ray synchrotron radiation is presented. A special ray-tracing program which utilizes the diffraction–refraction effect is developed. It is demonstrated both by ray-tracing simulations and by an experiment whereby a reasonably good sagittal concentration of 8 keV synchrotron radiation may be achieved by diffraction on the walls of a cylindrical hole drilled into an Si crystal. The holes were drilled parallel to the (111) planes and their diameter, 1 mm, was chosen so that the focusing distance fits the geometrical arrangement of beamline BM5 at the ESRF. Two such crystals have been used in a dispersive and non-dispersive arrangement. The better result was achieved using the dispersive arrangement. The intensity at the centre of the focus is increased by five times with respect to unfocused radiation. Excellent agreement exists between the ray-tracing simulations and experimental results.
beteiligte Personen: Artemiev, N.. , Hrdý, J.. , Peredkov, S.. , Artemev, A.. , Freund, A.. , Tucoulou, R..
Format: Elektronisch
Erschienen: 2001.
Serie: Crystallography Journals Online : IUCR Backfile Archive 1948-2001 [Dig. Serial]
Schlagwörter:
URL: http://dx.doi.org/10.1107/S0909049501014364

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