PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - GRI - Gamma Ray Indirect
Calibration and operation of SiPM-based cameras for gamma-ray astronomy in presence of high night-sky light
C.M. Alispach*, I. Al Samarai, M. Balbo, A.M. Barbano, V. Beshley, A. Biland, J. Blazek, J. Błocki, J. Borkowski, T. Bulik, F.R. Cadoux, L. Chytka, V. Coco, N. De Angelis, D. Della Volpe, Y. Favre, T. Gieras, M. Grudzińska, P. Hamal, M. Heller, M. Hrabovsky, J. Juryšek, J. Kasperek, K. Koncewicz, A. Kotarba, É. Lyard, E. Mach, D. Mandat, S. Michal, J. Michałowski, R. Moderski, T. Montaruli, A. Nagai, D. Neise, J. Niemiec, T.R. Njoh Ekoume, M. Ostrowski, M. Palatka, P. Paśko, M. Pech, B. Pilszyk, H. Przybilski, P. Rajda, Y. Renier, P. Rozwadowski, P. Schovanek, K. Seweryn, V. Sliusar, D. Smakulska, D. Sobczyńska, Ł. Stawarz, J. Świerblewski, P. Świerk, P. Travnicek, I. Troyano Pujadas, R. Walter, M. Wiecek, A. Zagdański and K. Ziȩtaraet al. (click to show)
Full text: pdf
Pre-published on: July 23, 2019
Published on: July 02, 2021
Abstract
The next generation of Cherenkov telescope cameras feature Silicon Photo Multipliers (SiPM), which can guarantee excellent performance and allow for observation also under moonlight, increasing duty-cycle and therefore the physics reach. A 4 m-diameter Davies-Cotton prototype telescope with a 9-degree optical FoV and a 1296-pixel SiPM camera, has been designed to meet the requirements of the next generation of ground-based gamma-ray observatories at the highest energies.

The large-scale production of the telescopes for array deployment has required the development of a fully automated calibration strategy which relies on a dedicated hardware, the Camera Test Setup (CTS). For each camera pixel, the CTS is equipped with two LEDs, one operated in pulsed mode to reproduce signal and one in continuous mode to reproduce night-sky background.

In this contribution we will present the camera calibration strategy, from the laboratory measurement to the on-site monitoring with emphasis on the results obtained with the first camera prototype. In addition, key performances such as charge resolution, time resolution and trigger efficiencies and their degradation with increasing night-sky background level will be presented.
DOI: https://doi.org/10.22323/1.358.0617
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.