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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 591 / 1 (2008) 159-162
XPAD3-S: A fast hybrid pixel readout chip for X-ray synchrotron facilities
P. Pangaud1, S. Basolo1, Nathalie Boudet2, Jean-François Berar2, B. Chantepie1, J.-C. Clemens1, P. Delpierre1, B. Dinkespiler1, K. Medjoubi3, S. Hustache3, M. Menouni1, C. Morel1
(2008)

At X-ray synchrotron facilities, scattering experiments require detectors with a large sensitive surface, an high count rate capability, a large counter dynamics, a fast readout system and an adjustable energy threshold. XPAD3 is a new pixellized photon detector based on hybrid pixel technology, which provides low noise data readout at high speed. It is designed in 0.25μm IBM technology and contains 9600 pixels (130μm x 130μm) distributed into 80 columns of 120 elements each. Its features have been optimized to fulfill a count rate capability up to 10^6 photons/pixel/s, an high dynamic range over 35keV, a very low noise of 130e-, and a threshold adjustment well below 4keV. Fast data readout below 2ms/frame is expected. To meet these requirements, an innovative architecture has been designed that makes possible the read out the circuit during acquisition while preserving the precise setting of the thresholds all over the pixel array. The XPAD3 circuit can be bumpbonded with Si, CdTe, or GaAs sensors to optimize its detection efficiency at high X-ray energies. XPAD3 detector modules will be tiled together to form the XPIX detector with a 8cm x 12cm sensitive area. We present first results obtained using a single chip prototype of the XPAD3 detector.
1 :  CPPM - Centre de Physique des Particules de Marseille
2 :  NEEL - Institut Néel
3 :  SSOLEIL - Synchrotron SOLEIL
CRG
Physique/Physique/Instrumentations et Détecteurs
hybrid pixel detectors – single photon counting – high counting rate – X-ray imaging