An extensive study for correcting the nonlinear particle density measured by GRAPES-3 scintillator detectors

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 GRAPES-3 extensive air shower (EAS) array located at Ooty is equipped with 400 plastic scintillator detectors spread over an area of 25000 m$^2$ and a muon telescope of area 560 m$^2$ built with 3,712 proportional counters. One of its principal objectives is to measure the primary cosmic ray energy spectrum in the TeV-PeV energy region. The response of the photo-multiplier tubes (PMTs) used in the plastic scintillator detectors becomes nonlinear at densities larger 50 particles per m$^2$ in large EAS. We describe a technique to correct for the nonlinearity of these PMTs, thereby extending the dynamic range of the detector for observed particle densities up to 1000 particles per m$^2$. The details of the technique will be presented.'

Authors: Anuj Chandra | For the GRAPES-3 Collaboration
Collaboration: GRAPES-3

Indico-ID: 1286
Proceeding URL: https://pos.sissa.it/395/396