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Proceedings Paper

Scintillating screen CCD camera using fast analog on-chip storage for time-resolved x-ray absorption spectroscopy
Author(s): Andreas Koch; Michael Hagelstein; Alfonso San Miguel; Alain Fontaine; Thorsten Ressler
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Paper Abstract

Serial readout of cooled, linear Si-photodiode arrays or CCDs offer a high dynamic range but only at moderate pixel readout rates. Recording spectroscopic information, i.e. 1D images, requires only a few sensitive lines of a 2D CCD array. A camera is presented where the unexposed part of the CCD is used as a buffer to store successive spectra with high frame rates. In this 'streak mode' the time resolution for data acquisition depends only on the line shift time of the CCD and no longer on the slow pixel readout time. A frame rate of 10 kHz for X-ray absorption spectra has been achieved. The CCD is part of an X-ray camera consisting of a scintillating screen lens-coupled to the CCD. The camera provides a high dynamic range of 17 bit, a spatial resolution of 60 micrometers (FWHM) and a high detective quantum efficiency of > 40% for x- ray energies between 4 keV and 25 keV. The camera is used for time- resolved energy-dispersive XAFS (X-ray Absorption Fine Structure) experiments. This technique permits the study of time-dependent variations of electronic properties and the local environment of atoms under induced external perturbation.

Paper Details

Date Published: 14 March 1995
PDF: 9 pages
Proc. SPIE 2416, Cameras and Systems for Electronic Photography and Scientific Imaging, (14 March 1995); doi: 10.1117/12.204820
Show Author Affiliations
Andreas Koch, European Synchrotron Radiation Facility (France)
Michael Hagelstein, European Synchrotron Radiation Facility (France)
Alfonso San Miguel, European Synchrotron Radiation Facility (France)
Alain Fontaine, European Synchrotron Radiation Facility (France)
Thorsten Ressler, Univ. Hamburg (Germany)

Published in SPIE Proceedings Vol. 2416:
Cameras and Systems for Electronic Photography and Scientific Imaging
Constantine N. Anagnostopoulos; Michael P. Lesser, Editor(s)

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