Abstract
Results are presented from Monte Carlo calculations of the effective areas and count rates of the TAIGA–IACT Cherenkov telescope with an upgraded SiPM OnSemi MicroFJ-60035 camera equipped with SL 290–590 and SL 280–390 filters. It is shown that the threshold energy (by triggering cosmic gamma-quanta) of the TAIGA–IACT telescope with a SiPM camera and an SL 290–590 filter is ≈0.4 TeV, slightly lower than that of the current TAIGA–IACT configuration with a PMT camera (0.5 TeV). The threshold energy of the TAIGA–IACT telescope with a SiPM camera and an SL 280–390 filter is ≈0.7 TeV, which is quite acceptable for Cherenkov telescopes with a mirror area of 10 m2. These results, plus the expected stability of the SiPM design with excessive illumination and the ability to use UV filters (which allow observations at twilight and on moonlit nights without raising the trigger threshold signal appreciably), indicate that the TAIGA–IACT telescope with a SiPM camera is a promising instrument for observing cosmic gamma radiation in the TeV range.
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Funding
This work was supported by the Russian Science Foundation, project no. 19-72-20045. Our results can be used to modernize UNU Astrophysical complex MSU–ISU under Agreement 13.UNU.21.0007 between the Ministry of Science and Higher Education of the Russian Federation and Irkutsk State University.
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Kholupenko, E.E., Krassilchtchikov, A.M., Badmaev, D.V. et al. Expected Characteristics of the TAIGA–IACT Cherenkov Telescope Equipped with SiPM Detectors. Bull. Russ. Acad. Sci. Phys. 88, 427–430 (2024). https://doi.org/10.1134/S1062873823705652
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DOI: https://doi.org/10.1134/S1062873823705652