PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Cosmic-Ray Indirect. CRI-instrumentation EAS
Timing calibration of the LHAASO-KM2A electromagnetic particle detectors
H. Lv*, H. He, X. Sheng and J. Liu
Full text: pdf
Pre-published on: August 16, 2017
Published on: August 03, 2018
Abstract
The Large High Altitude Air Shower Observatory (LHAASO) is a multipurpose project focusing on high energy gamma ray astronomy and cosmic ray physics. The 1 km2 array (KM2A) of this observatory will consist of 5242 electromagnetic particle detectors (EDs) and 1171 muon detectors (MDs). The remoteness and numerous EDs extremely demand a robust and automatic calibration procedure. In this paper, a self-calibration method which relies on the measurement of charged particles within the extensive air showers is proposed. The method is fully validated by Monte Carlo simulation and successfully applied in a KM2A prototype array experiment. The self-calibration method can be used to determine the detector time-offset constants at the subnanosecond level, which is adequate to meet the physical requirements of LHAASO experiment.
DOI: https://doi.org/10.22323/1.301.0455
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