Speaker
Riccardo Rando
(University and INFN Padova)
Description
The Cherenkov Telescope Array (CTA) is the the next generation facility of Imaging Atmospheric Cherenkov Telescopes; two observatories will cover both hemispheres. CTA will reach unprecedented sensitivity, energy and angular resolution in very-high-energy gamma-ray astronomy. Each CTA array will include four Large Size Telescopes (LSTs), designed to cover the low-energy range of the CTA sensitivity (~20 GeV to 200 GeV).
In the baseline LST design, the focal-plane camera will be instrumented with 265 photodetector clusters that include 7 1.5-inch photomultiplier tubes (PMTs). The PMT design is based on mature and reliable technology. Recently, silicon photomultipliers (SiPMs) are emerging as a competitor. Currently, SiPMs have advantages (e.g. lower operating voltage and tolerance to high illumination levels) and disadvantages (e.g. higher capacitance and cross talk rates), but this technology is still young and rapidly evolving. SiPM technology has a strong potential to become superior to the PMT one in terms of photon detection efficiency and price per square mm of detector area. While the advantage of SiPMs could be proven for high-density, small-size cameras, it is yet to be shown for large area cameras as the one of the LSTs.
The CTA-LST SiPM R&D team is committed to developing a SiPM-based module for the LST camera, in view of a possible camera upgrade. We will describe the solutions we are exploring in order to balance a competitive performance with a minimal impact on the overall LST camera design.
| Registration number following "ICRC2015-I/" | 0186 |
|---|---|
| Collaboration | CTA |
Primary authors
Alessandro De Angelis
(INFN Padova and LIP/IST Lisboa)
Alexander Hahn
(Max-Planck-Institute for Physics)
Antonios Dettlaff
(Max-Planck-Institute for Physics)
Carlo Stella
(University of Udine and INFN)
Christian Manea
(INFN Padova)
Cornelia Schultz
(University of Padova and INFN)
Daniel Mazin
(University of Tokyo and ICRR)
Daniele Corti
(INFN Padova)
David Fink
(Max-Planck-Institute for Physics)
Fatima Mehrez
(LAPP, CNRS-IN2P3)
Felix Grundner
(Max-Planck-Institute for Physics)
Francesco Dazzi
(Max-Planck-Institute for Physics)
Gasper Kukec Mezek
(University of Nova Gorica)
Holger Wetteskind
(Max-Planck-Institute for Physics)
Ignasi Reichardt
(INFN Padova)
Marko Zavrtanik
(Jozef Stefan Institute (SI))
Masahiro Teshima
(Max-Planck-Institute for Physics)
Mosè Mariotti
(INFN Padova)
Nadia Fouque
(LAPP, CNRS-IN2P3)
Dr
Razmik Mirzoyan
(Max-Planck-Institute for Physics)
Riccardo Rando
(University and INFN Padova)
Richard Hermel
(LAPP, CNRS-IN2P3)
Ronald Maier
(Max-Planck-Institute for Physics)
Samo Korpar
(Jozef Stefan Institute)
Sergey Podkladkin
(Max-Planck-Institute for Physics)
Sylvie Rosier
(LAPP, CNRS-IN2P3)
Werner Haberer
(Max-Planck-Institute for Physics)
