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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 589 (2008) 268-274
A 20 kpixels CdTe photon-counting imager using XPAD chip
S. Basolo1, Jean-François Bérar2, Nathalie Boudet2, P. Breugnon1, B. Chantepie1, J.C. Clémens1, P. Delpierre1, B. Dinkespiler1, S. Hustache3, K. Medjoubi3, M. Ménouni1, C. Morel1, P. Pangaud1, E. Vigeolas1

A 20 kpixels CdTe sensor has been hybridized on XPAD3S CMOS photon counting chips, forming a 19200 pixels imaging device. P-type CdTe with rectifying contact has been employed. This sensor works in hole collection mode with a pulse shaping time of about 150 ns. Detector construction and operation are described and first results obtained with 241Am source as well as diffraction images using an X-ray synchrotron beam are presented. Polarisation effects are present but remain at a very manageable level. Keywords: pixel detector, photon counting, CdTe, hole collection, XPAD3
1 :  CPPM - Centre de Physique des Particules de Marseille
2 :  NEEL - Institut Néel
3 :  SSOLEIL - Synchrotron SOLEIL
Physique/Physique/Instrumentations et Détecteurs
Pixel detector – Photon counting – CdTe – Hole collection – XPAD3