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Poster communications

A large dynamic range integrated front-end for photomultiplier tubes

Abstract : A full custom analog CMOS circuit for obtaining a photomultiplier readout with a 16 bit resolution over 7 V has been developed. It is part of the R&D program for the photomultiplier tube front-end readout of the Pierre Auger Observatory northern site. It performs signal duplication and amplification with three gains: 0.15, 1 and 6. Each amplifier has a resolution of 10 bit and can measure signals with durations of several microseconds with a good baseline stability, for an input charge of up to tens of nano-Coulombs. The amplification is performed by current feedback amplifiers with a bandwidth of 60 MHz.The input impedance, adapted to the coaxial cables, is stable over the whole working range. A prototype was submitted in April 2004 and successfully tested. The linearity over the working range is less than 1%. It was also successfully tested on the Auger surface detector element installed at Orsay (comprised of a Cherenkov water tank equipped with Photonis XP1805 9” diameter photomultiplier tubes). The resolution over 7 V is 16.6 bit.This circuit is the first step towards a “system-on-a-chip” (SoC) solution for a photomultplier tube readout equipped with a fast ADC for signal digitization. A setup using a single cable for both the signal and the photomultiplier high voltage power supply was shown to be successful.
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Contributor : Dominique Girod <>
Submitted on : Tuesday, October 31, 2006 - 8:54:07 AM
Last modification on : Wednesday, September 16, 2020 - 4:14:39 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 9:19:10 PM





B. Genolini, L. Raux, C. de la Taille, J. Pouthas, V. Tocut. A large dynamic range integrated front-end for photomultiplier tubes. P. Bourgeois, H. El Mamouni, P. Goret, P. LeDû, O. Limousin, P. Nédélec, V. Puill and J.C. Vanel. 4th International Conference on New Developments in Photodetection - BEAUNE 2005, Jun 2005, Beaune, France. 567, pp.209-213, 2006, ⟨10.1016/j.nima.2006.05.090⟩. ⟨in2p3-00110588⟩



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