NDLI: Position and flux stabilization of X-ray beams produced by double-crystal monochromators for EXAFS scans at the titanium K-edge.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Van Silfhout, Roelof Kachatkou, Anton Groppo, Elena Lamberti, Carlo Bras, Wim
Description	Country affiliation: United kingdom Author Affiliation: van Silfhout R ( School of Electrical and Electronic Engineering, The University of Manchester, Sackville Street, Manchester M13 9PL, UK.); Kachatkou A ( School of Electrical and Electronic Engineering, The University of Manchester, Sackville Street, Manchester M13 9PL, UK.); Groppo E ( Department of Chemistry, NIS Center of Excellence, CrisDi Center for Crystallography, and INSTM Unit, University of Turin, Via Giuria 7, Turin I-10125, Italy.); Lamberti C ( Department of Chemistry, NIS Center of Excellence, CrisDi Center for Crystallography, and INSTM Unit, University of Turin, Via Giuria 7, Turin I-10125, Italy.); Bras W ( Netherlands Organization for Scientific Research (NWO), Dubble, ESRF, 6 Rue Jules Horowitz, 38043 Grenoble, France.)
Abstract	The simultaneous and active feedback stabilization of X-ray beam position and monochromatic beam flux during EXAFS scans at the titanium K-edge as produced by a double-crystal monochromator beamline is reported. The feedback is generated using two independent feedback loops using separate beam flux and position measurements. The flux is stabilized using a fast extremum-searching algorithm that is insensitive to changes in the synchrotron ring current and energy-dependent monochromator output. Corrections of beam height are made using an innovative transmissive beam position monitor instrument. The efficacy of the feedback stabilization method is demonstrated by comparing the measurements of EXAFS spectra on inhomogeneous diluted Ti-containing samples with and without feedback applied.
File Format	HTM / HTML
ISSN	09090495
Issue Number	Pt 2
Journal	Journal of Synchrotron Radiation
Volume Number	21
e-ISSN	16005775
Language	English
Publisher	IUCr
Publisher Date	2014-03-01
Publisher Place	United States
Access Restriction	Subscribed
Subject Keyword	Discipline Radiology
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Instrumentation Radiation

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