Cam-driven monochromator for QEXAFS

We have developed a cam-drive for quickly tuning the energy of an X-ray monochromator through an X-ray absorption edge for quick extended X-ray absorption spectroscopy (QEXAFS). The data are collected using a 4-channel, 12-bit multiplexed VME analog to digital converter and a VME angle encoder. The...

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Bibliographic Details
Published in:Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2006-11, Vol.75 (11), p.1962-1965
Main Authors: Caliebe, W.A., So, I., Lenhard, A., Siddons, D.P.
Format: Article
Language:English
Subjects:
QEXAFS
Time-resolved studies
XAFS
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Summary:We have developed a cam-drive for quickly tuning the energy of an X-ray monochromator through an X-ray absorption edge for quick extended X-ray absorption spectroscopy (QEXAFS). The data are collected using a 4-channel, 12-bit multiplexed VME analog to digital converter and a VME angle encoder. The VME crate controller runs a real-time operating system. This system is capable of collecting 2 EXAFS-scans in 1 s with an energy stability of better than 1 eV. Additional improvements to increase the speed and the energy stability are under way.
ISSN:0969-806X
1879-0895
DOI:10.1016/j.radphyschem.2005.07.047