Speaker
Description
The Southern Wide-field Gamma-ray Observatory (SWGO) is a next-generation ground-based gamma-ray detector under development to reach a full sky coverage together with the current HAWC and LHAASO experiments in the northern hemisphere. It will complement the observation of transient and variable multi-wavelength and multi-messenger phenomena, offering moreover the possibility to access the Galactic Centre. SWGO will consist of an array of water Cherenkov tanks, with a high fill-factor inner array and a low-density outer array, covering an overall area of one order of magnitude larger than HAWC. To reach a high detection efficiency and discrimination capability between gamma-ray and hadronic air showers, various tank designs were studied. Double-layer tanks with several sizes, shapes and number of photomultiplier tubes have been considered. Single-particle simulations have been performed to study the tank response, using muons, electrons, and gamma-rays with energies typical of extensive air showers particles, entering the tanks with zenith angles from 0 to 60 degrees. The tank response was evaluated considering the particle detection efficiency, the number of photoelectrons detected by the photomultiplier tubes, and the time resolution of the first photoelectron. The study allowed to compare the performance of tanks with circular, square and hexagonal base, to understand which design optimizes the performance of the array. The method used in the study and the results will be discussed in this paper.
Keywords
Gamma-rays; water Cherenkov detector; simulations
| Subcategory | Future projects |
|---|---|
| Collaboration | SWGO |
