PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Cosmic-Ray Physics (Indirect, CRI)
The end-to-end Calibration of LHAASO-WFCTA based on Nitrogen Laser System
Q. Sun*, Z. Min, H. Liu, F. Zhu, S. Zhang, C. Long and Y. Wang
Full text: pdf
Pre-published on: July 25, 2023
Published on: —
Abstract
The Wide Field-of-view Cherenkov Telescope Array (WFCTA) of Large High Altitude Air Shower
Observatory (LHAASO) is designed to perform nearly calorimetric measurements of extensive
air showers induced by cosmic rays with energies between 1013 eV - 1018 eV. In order to achieve
an end-to-end calibration of WFCTA and investigate properties of the atmospheric aerosol, five
laser systems have been operated at LHAASO, including 3 nitrogen and 2 Nd:YAG laser devices.
This work presents an overview of the laser signals received by the telescope and the monitoring
of geometric information related to nitrogen laser events. Additionally, it introduces the simulation method for the LHAASO-WFCTA laser calibration system. Through prolonged and stable
operation, a substantial amount of data has been accumulated, requiring further data analysis for
the calibration of the telescope’s absolute gain and measurement of aerosol extinction coefficients.
DOI: https://doi.org/10.22323/1.444.0494
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