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Determination of local muon flux using astronomical Charged Coupled Device
摘要： As an abundant component of secondary cosmic rays at the Earth, muons carry significant data, such as information on mass number of primary particles producing extensive air showers. Anyhow, the total muon flux is an important observable in many phenomena, for example it is suggested that the muon flux is influenced by the level of solar activity at the Earth, while the neutrino anomaly and hadronic interaction models are studied through the products of muon decay. As a result a part of any cosmic ray detector is designed to observe muons, count and evaluate their energy and angular distribution. Thus a simple method was started in Research Institute for Astronomy and Astrophysics of Maragha, University of Maragheh to study the recorded tracks of particles by an astronomical CCD at 1478 m above sea level. To analyze recorded data and determine the muon flux from experiments, the flux of secondary atmospheric muons simulated with CORSIKA code (version 6.9) to study the muon angular distribution for our geographical location (latitude: 46.2534 E, longitude: 37.3892 N). The data used here were gathered during a ground run on 4 months (of 2016 and 2017), at Maragheh, Iran. The paper presents numerical results of the muon's flux obtained at 1478 m above sea level which is in good agreement with expected values from simulations. The results were compared with experimental data from different experiments.
关键词： Simulation,CORSIKA,Cosmic rays,Detector,Muon,CCD
更新于2025-09-23 15:19:57
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Charge measurement of cosmic ray nuclei with the plastic scintillator detector of DAMPE
摘要： One of the main purposes of the DArk Matter Particle Explorer (DAMPE) is to measure the cosmic ray nuclei up to several tens of TeV or beyond, whose origin and propagation remains a hot topic in astrophysics. The Plastic Scintillator Detector (PSD) on top of DAMPE is designed to measure the charges of cosmic ray nuclei from H to Fe and serves as a veto detector for discriminating gamma-rays from charged particles. We propose in this paper a charge reconstruction procedure to optimize the PSD performance in charge measurement. Essentials of our approach, including track finding, alignment of PSD, light attenuation correction, quenching and equalization correction are described detailedly in this paper after a brief description of the structure and operational principle of the PSD. Our results show that the PSD works very well and almost all the elements in cosmic rays from H to Fe are clearly identified in the charge spectrum.
关键词： Charge measurement,Cosmic rays,Calibration
更新于2025-09-04 15:30:14