A GEANT4 based simulation framework for the large area muon telescope of the GRAPES-3 experiment
JOURNAL OF INSTRUMENTATION(2023)
摘要
The GRAPES-3 experiment located in Ooty, India, samples the electron and muon components in extensive air showers using an array of plastic scintillator detectors and a muon telescope (G3MT) consisting of proportional counters to study the composition of primary cosmic rays (PCRs) as well as gamma-ray sources in the TeV-PeV energy range. The G3MT is designed with an appropriate mass absorber to shield the electromagnetic and hadronic components in the shower and to detect muons above 1 GeV x sec(theta) energy, incident from a zenith angle theta. We developed a simulation framework based on the GEANT4 toolkit to evaluate the response of shower particles such as muons gamma-rays, electrons and hadrons in the G3MT. We discuss the geometric modeling of the G3MT using GEANT4 starting with the proportional counter. We estimated the punch-through contribution of hadrons in the G3MT. We compare the simulated muon multiplicity distributions with the observed ones assuming PCR composition from a four population supernova remnant acceleration model namely H4a.
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关键词
large area muon telescope,geant4,experiment,simulation
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