Speaker
Dr
Alessandro Berra
(Universita dell'Insubria & INFN, Milano-Bicocca (IT))
Description
In recent years Silicon Photomultipliers (SiPMs) have been proposed as a new type of readout system for scintillating detectors in many experiments. SiPMs consist of a matrix of parallel-connected silicon micro-pixels, which are independent photon counters working in limited Geiger mode with very high gain ($\sim$10$^6$). This contribution presents the use of SiPMs (manufactured by FBK-irst) as the readout system of a 3x3 matrix of lead tungstate crystals. The PbWO$_4$ crystals have been provided by the CMS-ECAL group and are pre-production prototypes of the endcap section of the CMS electromagnetic calorimeter; they have a trapezoidal shape (with a front section of 2.86x2.86~cm$^2$ and a rear one of 2.96x2.96~cm$^2$) and are 22~cm long, corresponding to 24.7~$X_0$. Each crystal will be readout using four SiPMs characterized by an active area of 4x4~mm$^2$ and 6400 cells, hosted on the same PCB. The gain equalization and its variation with the temperature will be corrected using a LED system directly integrated on each PCB. A front-end board based on the MAROC3 ASIC will be used for the readout of the SiPMs signal. The performance of the crystal matrix in terms of linearity and energy resolution will be tested in November 2012 at CERN at the SPS-H2 and PS-T9 beamlines in the 1-150~GeV energy range.
| quote your primary experiment | TWICE |
|---|
Primary author
Dr
Alessandro Berra
(Universita dell'Insubria & INFN, Milano-Bicocca (IT))
Co-authors
Aldo Penzo
(infn)
Daniela Lietti
(Università degli Studi dell'Insubria COMO + INFN Milano Bicocca)
Mr
Erik Vallazza
(INFN Sezione di Trieste)
Irina Rashevskaya
(Universita e INFN (IT))
Luciano Bosisio
(Universita e INFN (IT))
Michela Prest
(Univ. degli Studi Milano-Bicocca (IT))
Valter Bonvicini
(INFN)
