a Double Layer Silicon Detector for Single Photon Counting

Details a Double Layer Silicon Detector for Single Photon Counting a Double Layer Silicon Detector for Single Photon Counting

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apsp.conf..700v&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 10th Conference. Held

Physics

Medical Physics

2

Digital Mammography, Synchrotron Radiation, Phase Contrast Imaging

Scientific paper

The SYRMEP Beamline at the ELETTRA Synchrotron (Trieste, Italy) has already been performing clinical mammographic examinations using X-rays generated by one bending magnet. These examinations have been performed with traditional screen-film systems, but in order to exploit the characteristics of the beam (monochromatic in the energy range 8.5-35 keV, with a rate up to 7 × 107 photons/(mm2·s) at 17 keV), a double layer Silicon detector has been developed within the INFN PICASSO project. This detector is the evolution of the single layer already deployed by the INFN MATISSE project, in collaboration with the Paul Scherrer Institut. This single layer was based on a microstrip Silicon sensor (50 (μm pitch) coupled to the Mythen-II high-rate photon counting ASIC, used in the edge-on configuration to improve the detection efficiency. This contribution presents the development of a double layer with limited coverage (5.5 cm instead of 21 cm), used to verify all the steps in view of the construction of the full scale assembly. We present the results in terms of rate and of the imaging capability of standard phantoms, recorded in the phase contrast imaging modality.

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