Crystallography Research Today is a free monthly online journal that collates and summarizes the latest research about Crystallography, including details on x-ray crystals, techniques, analyses, structures.

A wide-aperture dynamically focusing sagittal monochromator for X-ray spectroscopy and diffraction.

Bilsborrow RL, Atkinson PA, Bliss N, Dent AJ, Dobson BR, Stephenson PC

CCLRC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, UK. r.l.bilsborrow@dl.ac.uk

A scanning dynamically focusing sagittal X-ray monochromator accepting 7 mrad of the fan from a 6 T wiggler is in routine use on beamline 16.5 (ultra-dilute spectroscopy) of the SRS at CCLRC Daresbury Laboratory, UK. The energy range covered is 7-27 keV, with a horizontal spot size of <1.1 mm FWHM. Measured monochromatic flux from a Si 220 crystal pair is 1 x 10(11) photons s(-1) (100 mA)(-1) at 9 keV. This level of flux, usually associated with an insertion device on a third-generation source, permits collection of EXAFS data on concentrations at or below 10 ppm.

Published 22 December 2005 in J Synchrotron Radiat, 13: 54-8.
Full-text of this article is available online (may require subscription).

© 2005-2008 Crystallography Research Today. All Rights Reserved.