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The current generation of Imaging Atmospheric Cherenkov Telescopes (IACTs),comprised of major installations such as the MAGIC telescopes, H.E.S.S. andVERITAS, is classified as the 3$^{\mathrm{rd}}$ generation of suchsinstruments. These telescopes use multipixel cameras composed of thousands ofphotomultiplier tubes (PMTs). The total light throughput of such instrumentsdepends, besides the PMT photon detection efficiency (PDE), on the mirror dishreflectivity, and the light absorption by the camera window. The supremacy ofPMTs is currently being challenged by photon sensors rapidly spreading inpopularity, the silicon photomultipliers (SiPMs), that are becoming a validalternative thanks to their high PDE, low operating voltage and flexibility ininstallation. In this report, we investigate the performance of an existing3$^{\mathrm{rd}}$-generation IACT array (taking as an example MAGIC) in whichPMTs would be replaced with SiPMs, with minimal further hardware intervention.This would mean that other systems of the telescope responsible for the lightcollection, in particular the optics, would remain the same, and only theelectronic to steer the different photodetectors would be modified. We find anincrease of sensitivity up to a factor of 2 for energies below 200~GeV.Interestingly, we also find that the stronger sensitivity of SiPMs in the redpart of the spectrum, a source of background for IACTs, does not affect thisconclusion.

A study on Performance Boost of a 17~m class Cherenkov telescope with a SiPM-based camera