BEXCO - Room F(201/202/203/204)
[CRI177] Simulation study of proton-induced and iron-induced extensive air shower at the knee energies using the new Tibet experiment
- LIUMING ZHAI
- LIUMING ZHAI (National Astronomical Observatories, Chinese Academy of Sciences)
As the particle lateral density distribution of extensive air showers (EAS) is the key quantity for most cosmic-ray ground-based experiments, the lateral distribution function (LDF) of EAS plays an important role in the analysis of the air-shower events, including the reconstruction of air shower size and the lateral shower age, etc., which are closely correlated with the energy resolution and the identification of the primary chemical compositions. To measure the chemical compositions of primary cosmic rays at the knee energies, the Tibet ASgamma collaboration has constructed a new hybrid detector system in Tibet, China, since 2014. The new hybrid experiment consists of the air-shower array (Tibet-AS), the air-shower core-detector array (YAC) and the underground water-Cherenkov muon-detector array (MD). Here, we analyzed the differences of proton-induced and iron-induced air shower, and developed the modified LDFs for proton and iron components, respectively, based on the full Monte Carlo simulation with the new Tibet experiment (Tibet-AS+YAC+MD). The application of the new LDFs and the methods of how to obtain the final spectra of chemical compositions will be discussed in this paper.