2014/03/31 by A. Biland, A Biland, T Bretz +69 · 68 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Calibration #Cherenkov Telescope Array #Cherenkov detector #Cherenkov radiation #Detector #Neutrino Physics Research #Photodetector #Photon #Radiation Detection and Scintillator Technologies #Telescope #astro-ph.IM #physics.ins-det
paper · pdf · doi:10.1088/1748-0221/9/10/p10012
published in Journal of Instrumentation 9(10), P10012 (Institute of Physics)
arxiv created 2014/07/30 · openalex publication_date 2014/10/20 · arxiv updated 2014/12/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The First G-APD Cherenkov Telescope (FACT) is the first in-operation test of the performance of silicon photo detectors in Cherenkov Astronomy. For more than two years it is operated on La Palma, Canary Islands (Spain), for the purpose of long-term monitoring of astrophysical sources. For this, the performance of the photo detectors is crucial and therefore has been studied in great detail. Special care has been taken for their temperature and voltage dependence implementing a correction method to keep their properties stable. Several measurements have been carried out to monitor the performance. The measurements and their results are shown, demonstrating the stability of the gain below the percent level. The resulting stability of the whole system is discussed, nicely demonstrating that silicon photo detectors are perfectly suited for the usage in Cherenkov telescopes, especially for long-term monitoring purpose.