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XPAD: A Photons Counting Pixel Detector for Material Sciences and Small Animal imaging

Abstract : Experiments on high flux and high brilliance 3rd generation synchrotron X-ray sources are now limited by detector performance. Photon counting hybrid pixel detectors are being investigated as a solution to improve the dynamic range and the readout speed of the available 2D detectors. The XPAD2 is a large surface hybrid pixel detector (68 x 65 mm$^2$) with a dynamic response which ranges from 0.01 photons/pixel/s up to 10$^6$ photons/pixel/s. High resolution data have been recorded using the XPAD2. The comparison with data measured using a conventional setup shows a gain on measurement duration by a factor 20 and on dynamic range. A new generation of pixel detector (XPAD3) is presently under development. For this, a new electronic chip (the XPAD3) has been designed to improve spatial resolution by using 130 $\mu$m pixels and detector efficiency by using CdTe sensors. XPAD2 is also operated with PIXSCAN, a CT-scanner for mice.
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Contributor : Dominique Girod <>
Submitted on : Friday, November 17, 2006 - 10:27:09 AM
Last modification on : Thursday, March 5, 2020 - 3:16:20 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 10:54:49 PM




P. Delpierre, S. Basolo, Jean-François Berar, M. Bordesoule, Nathalie Boudet, et al.. XPAD: A Photons Counting Pixel Detector for Material Sciences and Small Animal imaging. X Pisa Meeting on Advanced Detectors: Frontier Detectors for Frontier Physics, May 2006, La Biodola, Italy. pp.250-253, ⟨10.1016/j.nima.2006.10.315⟩. ⟨in2p3-00114589⟩



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