Development of a SiPM Cherenkov camera demonstrator for the CTA observatory telescopes

astro-ph.IM

/ Authors

Michelangelo Ambrosio, Giovanni Ambrosi, Carla Aramo, Elisabetta Bissaldi, Alfonso Boiano, Carmela Bonavolontà, Emanuele Fiandrini, Nicola Giglietto, Francesco Giordano, Maria Ionica

and 9 more authors

Corrado de Lisio, Vincenzo Masone, Riccardo Paoletti, Vasile Postolache, Andrea Rugliancich, Daniela Simone, Valerio Vagelli, Massimo Valentino, Leonardo di Venere

/ Abstract

The Cherenkov Telescope Array (CTA) Consortium is developing the new generation of ground observatories for the detection of ultra-high energy gamma-rays. The Italian Institute of Nuclear Physics (INFN) is participating to the R&D of a possible solution for the Cherenkov photon cameras based on Silicon Photomultiplier (SiPM) detectors sensitive to Near Ultraviolet (NUV) energies. The latest NUV-HD SiPM technology achieved by the collaboration of INFN with Fondazione Bruno Kessler (FBK) is based on $30μ\mbox{m}\times30μ\mbox{m}$ micro-cell sensors arranged in a $6\times6\;\mbox{mm}^2$ area. Single SiPMs produced by FBK have been tested and their performances have been found to be suitable to equip the CTA cameras. Currently, INFN is developing the concept, mechanics and electronics for prototype modules made of 64 NUV-HD SiPMs intended to equip a possible update of the CTA Prototype Schwarzschild-Couder Telescope (pSCT) telescope. The performances of NUV-HD SiPMs and the design and tests of multi-SiPM modules are reviewed in this contribution.