The Small-Sized Telescopes for the Southern Site of the Cherenkov Telescope Array

Abstract

The Cherenkov Telescope Array (CTA) will use three telescope sizes to efficiently detect cosmic gamma rays in the energy range from several tens of GeV to hundreds of TeV. The Small-Sized Telescopes (SSTs) will form the largest section of the array, covering an area of many square kilometres on the CTA southern site in Paranal, Chile. Up to 70 SSTs will be implemented by an international consortium of institutes and teams as an in-kind contribution to the CTA Observatory. The SSTs will provide unprecedented sensitivity to gamma rays above 1 TeV and the highest angular resolution of any instrument above the hard X-ray band. CTA has recently finalised the technology that will be used for the SSTs: the telescopes will be a dual-reflector design with a primary reflector of ~4 m diameter, equipped with an SiPM-based camera with full waveform readout from $\sim$2000 channels covering a $\sim$9${}^{\circ }$ field of view. The Schwarzschild-Couder optical configuration leads to a small plate-scale, and consequently a compact, cost-efficient camera. In this contribution, we describe the experience gained operating telescope and camera prototypes during the CTA preparatory phase, and the development of the final SST design.

Proceedings of the 37th International Cosmic Ray Conference (ICRC2021), Berlin, Germany; PoS (ICRC2021) 728

Cited by in corpus (6)

• Mirror production for the Cherenkov telescopes of the ASTRI Mini-Array and of the MST project for the Cherenkov Telescope Array
• Development of a SiPM Pixel Prototype for the Large-Sized Telescope of the Cherenkov Telescope Array
• Evaluation of the effective mirror area of CTA Small-Sized Telescopes for camera design and Monte Carlo simulation
• Development of a blue-mirror multilayer coating on light concentrators for future SiPM cameras
• Multimodal Shifts in the Dark Current of Silicon Photomultipliers
• Using Muon Rings for the Calibration of the Cherenkov Telescope Array: An Analytical Solution for the Dual-Mirror Telescope Using Vector Geometry