Study of longitudinal development of air showers in the knee energy range

Abstract

Ground-based cosmic ray experiments detect cosmic ray mainly by measuring the longitudinal and lateral distribution of secondary particles produced in the extensive air shower (EAS). The EAS of cosmic ray in the knee energy region is simulated via CORSIKA software. Several simulation samples with different energy, composition and zenith angles were carried out to understand the longitudinal development of electron, muon and Cherenkov light in EAS. All the results presented were obtained assuming an observation plane at an altitude of 4400 m a.s.l. The differences of longitudinal development between electron and Cherenkov light were studied, and the reconstruction uncertainty of shower maximum for electron from Cherenkov light was estimated to be 10-15g/cm${}^2$ for nuclei above 1 PeV. The performances of energy measurement and the composition discrimination ability based on longitudinal development were studied and compared with that from lateral distribution. It was found that number of electron per depth at its shower maximum has the smallest shower-to-shower fluctuations, but the shower-to-shower fluctuations of electron density measured at observation level was very close to it when the appropriate zenith angle was employed. The shower-to-shower fluctuations of shower maximum for electron is 50-55 g/cm${}^2$ for proton, and 20-25 g/cm${}^2$ for iron, but the composition discrimination ability between nuclei from muon density measured at observation level is much better than the shower maximum variable from longitudinal development. The hadronic model dependencies of the longitudinal development and lateral distribution were also discussed.

References in corpus (20)

• KASCADE measurements of energy spectra for elemental groups of cosmic rays: Results and open problems
• The Status of the H.E.S.S. Project
• VHE Gamma-Ray Observation of the Crab Nebula and its Pulsar with the MAGIC telescope
• Cosmic Rays from the Knee to the Highest Energies
• Spectrum of cosmic rays, produced in supernova remnants
• The observation of the Crab Nebula with LHAASO-KM2A for the performance study
• The Knee of the Cosmic Hydrogen and Helium Spectrum below 1 PeV Measured by ARGO-YBJ and a Cherenkov Telescope of LHAASO
• Electron, Muon, and Hadron Lateral Distributions Measured in Air-Showers by the KASCADE Experiment
• Muons in air showers at the Pierre Auger Observatory: Measurement of atmospheric production depth
• The energy spectrum of cosmic rays beyond the turn-down around $10^{17}$ eV as measured with the surface detector of the Pierre Auger Observatory
• A Measurement of the Average Longitudinal Development Profile of Cosmic Ray Air Showers Between 10^{17}eV and 10^{18}eV
• Depth of shower maximum and mass composition of cosmic rays from 50 PeV to 2 EeV measured with the LOFAR radio telescope
• Final Results from the High Resolution Fly's Eye (HiRes) Experiment
• Cosmic ray spectrum of protons plus helium nuclei between 6 TeV and 158 TeV from HAWC data
• Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory
• VTSCat: The VERITAS Catalog of Gamma-Ray Observations
• Measurement of the Muon Production Depths at the Pierre Auger Observatory
• EAS age determination from the study of the lateral distribution of charged particles near the shower axis with the ARGO-YBJ experiment
• Identification of the primary mass of inclined cosmic ray showers from depth of maximum and number of muons parameters
• Properties of secondary components in extensive air shower of cosmic rays in knee energy region