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X-ray Spectroscopy and Multi-spectral Imaging
 Full technical note
Summary note
A bare, large area chip, for a multi-spectral imaging application, wire-bonded directly to a headboard for insertion into vacuum equipment.
 
The CaF spectrum above left is of a powder sample that has a 3% CaF component, superimposed on an Fe-55 spectrum. A KEY advantage of using this photon-counting spectroscopic technique is that an image is obtained at the same as a spectrum.
Using the CCD’s ability to provide energy resolution of individual photon events provides spectral information at the same time as spatial information is acquired. In the picture shown above, three images (top) of 9 mm latex spheres acquired simultaneously using
multi-spectral imaging at 3.3 keV (Au-M), 1.7 keV (Ta-M) and 5.0 keV (Ti-M) are shown (upper left-to-right respectively) along with a projected density distribution obtained by phase retrieval from the three images (lower).
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