A photomultiplier tube model for the water Cherenkov detectors of the LAGO

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
"The Latin American Giant Observatory (LAGO) is an international experiment spanning over 10 Latin American countries and Spain. LAGO scientific objectives include the study of gamma-ray bursts and space weather phenomena using water Cherenkov detectors (WCDs) deployed at different latitudes and altitudes. Large area (8-9 inches) photomultiplier tubes (PMTs) sense the Cherenkov radiation produced by secondary particles, induced by primary cosmic particles in the atmosphere, crossing the WCDs.rnrnWe present a photomultiplier model applied to the Hamamatsu R5912 tube used in the LAGO' WCDs. The ARTI simulation framework, developed by the LAGO collaboration, can incorporate it. The model depends on the number of dynodes, the bias voltage, the number of incident photons, the photodetection efficiency, and the bias network. The model implementation includes a simulation of the LAGO's front-end, allowing the system linearity evaluation under different conditions. rnrnThe model was validated with data recorded by the MuTe-Chitagá (Bucaramanga, LAGO-Colombia) and Nahuelito (Bariloche, LAGO-Argentina) WCDs. The ARTI simulation chain estimates the number of Cherenkov photons arriving at the detector's PMT. We compare the anode/dynode pulse amplitude ratio predicted by the model with detector measurements. We also contrast the estimated and measured vertical equivalent muon signal. The estimated vertical-muon charge (321.6 UADC) differs by 4% from the measured by the MuTe WCD (333 UADC)."

Authors: Jesús Peña-Rodríguez | Yesid León-Carreño | Sandra Hernández-Barajas | Luis A. Núñez | Luis Otiniano
Collaboration: LAGO

Indico-ID: 1412
Proceeding URL: https://pos.sissa.it/395/281