A study on Performance Boost of a 17~m class Cherenkov telescope with a SiPM-based camera
arXiv:2212.09456 · doi:10.1016/j.astropartphys.2023.102902
Abstract
The current generation of Imaging Atmospheric Cherenkov Telescopes (IACTs), comprised of major installations such as the MAGIC telescopes, H.E.S.S. and VERITAS, is classified as the 3 generation of suchs instruments. These telescopes use multipixel cameras composed of thousands of photomultiplier tubes (PMTs). The total light throughput of such instruments depends, besides the PMT photon detection efficiency (PDE), on the mirror dish reflectivity, and the light absorption by the camera window. The supremacy of PMTs is currently being challenged by photon sensors rapidly spreading in popularity, the silicon photomultipliers (SiPMs), that are becoming a valid alternative thanks to their high PDE, low operating voltage and flexibility in installation. In this report, we investigate the performance of an existing 3-generation IACT array (taking as an example MAGIC) in which PMTs would be replaced with SiPMs, with minimal further hardware intervention. This would mean that other systems of the telescope responsible for the light collection, in particular the optics, would remain the same, and only the electronic to steer the different photodetectors would be modified. We find an increase 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 red part of the spectrum, a source of background for IACTs, does not affect this conclusion.
References in corpus (24)
- Design Concepts for the Cherenkov Telescope Array
- The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
- Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
- Performance of the MAGIC stereo system obtained with Crab Nebula data
- Characterization of Three High Efficiency and Blue Sensitive Silicon Photomultipliers
- LA Palma Night-Sky Brightness
- Performance of the MAGIC telescopes under moonlight
- Calibration and performance of the photon sensor response of FACT -- The First G-APD Cherenkov telescope
- MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV
- An innovative silicon photomultiplier digitizing camera for gamma-ray astronomy
- Observations of the Crab Nebula and Pulsar with the Large-Sized Telescope Prototype of the Cherenkov Telescope Array
- Very-high energy gamma-ray astronomy: A 23-year success story in high-energy astroparticle physics
- Design, optimization and characterization of the light concentrators of the single-mirror small size telescopes of the Cherenkov Telescope Array
- Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analyzing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR
- CTA - A Project for a New Generation of Cherenkov Telescopes
- Design of light concentrators for Cherenkov telescope observatories
- Design and performance of the prototype Schwarzschild-Couder Telescope camera
- Design of a SiPM-based cluster for the Large Size Telescope camera of CTA
- Studies on a silicon-photomultiplier-based camera for Imaging Atmospheric Cherenkov Telescopes
- Effect of the uncertainty in the hadronic interaction models on the estimation of the sensitivity of the Cherenkov Telescope Array
- Prototyping Hexagonal Light Concentrators Using High-Reflectance Specular Films for the Large-Sized Telescopes of the Cherenkov Telescope Array
- Development of a SiPM Pixel Prototype for the Large-Sized Telescope of the Cherenkov Telescope Array
- Calibration of 122 SensL MicroFJ-60035 SiPMs and the reduction of optical crosstalk due to coupled light guides
- Monte Carlo Studies of Combined MAGIC and LST1 Observations