Double-layered Water Cherenkov Detector for SWGO

Kunwar, S.; Abreu, P.; Albert, A.; Anguner, E. O.; Arcaro, C.; Arnaldi, L. H.; Arteaga-Velazquez, J. C.; Assis, P.; Bakalova, A.; de Almeida, U. B.; Batkovic, I.; Bellido, J.; Belmont-Moreno, E.; Bisconti, F.; Blanco, A.; Bohacova, M.; Bottacini, E.; Bretz, T.; Brisbois, C.; Brogueira, P.; Brown, A. M.; Bulik, T.; Mora, K. S. C.; Campos, S. M.; Chiavassa, A.; Chytka, L.; Conceicao, R.; Consolati, G.; Paleta, J. C.; Dasso, S.; De Angelis, A.; De Bom, C. R.; de la Fuente, E.; de Souza, V.; Depaoli, D.; Di Sciascio, G.; Dib, C. O.; Dorner, D.; Doro, M.; Du Vernois, M.; Ergin, T.; Fan, K. L.; Fraija, N.; Funk, S.; Garcia, J. I.; Garcia-Gonzalez, J. A.; Roca, S. T. G.; Giacinti, G.; Goksu, H.; Gonzalez, B. S.; Guarino, F.; Guillen, A.; Haist, F.; Hansen, P. M.; Harding, J. P.; Hinton, J.; Hofmann, W.; Hona, B.; Hoyos, D.; Huentemeyer, P.; Hueyotl-Zahuantitla, F.; Insolia, A.; Janecek, P.; Joshi, V.; Khelifi, B.; La Mura, G.; Lapington, J.; Laspiur, M. R.; Leitl, F.; Longo, F.; Lopes, L.; Lopez-Coto, R.; Mandat, D.; Mariazzi, A. G.; Mariotti, M.; Moraes, A. M.; Martinez-Castro, J.; Martinez-Huerta, H.; May, S.; Melo, D. G.; Mendes, L. F.; Mendes, L. M.; Mineeva, T.; Mitchell, A.; Mohan, S.; Olivares, O. G. M.; Moreno-Barbosa, E.; Nellen, L.; Novotny, V.; Olivera-Nieto, L.; Orlando, E.; Pech, M.; Pichel, A.; Pimenta, M.; de Albuquerque, M. P.; Prandini, E.; Cuchills, M. S. R.; Reisenegger, A.; Reville, B.; Rho, C. D.; Rovero, A. C.; Ruiz-Velasco, E.; Salazar, G. A.; Sandoval, A.; Santander, M.; Schoorlemmer, H.; Schussler, F.; Serrano, V. H.; Shellard, R. C.; Sinha, A.; Smith, A. J.; Surajbali, P.; Tome, B.; Aguilar, I. T.; van Eldik, C.; Vergara-Quispe, I. D.; Viana, A.; Vicha, J.; Vigorito, C. F.; Wang, X.; Werner, F.; White, R.; Jara, M. A. Z.

doi:10.22323/1.395.0902

The Southern Wide-field Gamma-ray Observatory (SWGO) will use the well-established and cost-effective technique of detecting Cherenkov light produced in water-filled detection units for TeV gamma-ray astronomy. Leveraging detector material reflectivity together with an optimised aspect ratio is an option to improve the performance of an array of such detector units. The double-layered Water Cherenkov Detector units comprise chambers with single photosensors in each. A reflective upper compartment enhances sensitivity to impinging secondary particles. A shallow lower compartment enables muon tagging and consequently improves the gamma hadron separation power of the observatory. Here we present detailed studies on the double-layered unit design.