Performance Test Of The Electromagnetic Particle Detectors For The LHAASO Experiment
Abstract
The Large High Altitude Air Shower Observatory (LHAASO) is a new generation hybrid cosmic ray observatory which is expected to reveal the mystery of the origin of cosmic rays. The one square kilometer array (KM2A) consisting of 5195 Electromagnetic particle Detectors (ED) and 1188 Muon Detectors (MD) is a sub-array of LHAASO. The EDs are designed to measure the density and arriving time of the secondary particles of extensive air showers. The performance of the EDs is tested for the quality control after construction in the laboratory at sea level. In this paper, the performance of more than four thousand EDs is summarized. The performance of all tested EDs meets the design requirements with the time resolution of 1.6 ns, the detection efficiency of 97.8%, charge resolution for single particle of 18.5% and count rate around 480 Hz. Furthermore, one ED is singled out for monitoring of the long-term stability over a period of nearly two years from December 2018 to November 2020.
Recommended Citation
"Performance Test Of The Electromagnetic Particle Detectors For The LHAASO Experiment," Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, vol. 1001, article no. 165193, Elsevier, Jun 2021.
Department(s)
Physics
Keywords and Phrases
CORARS; Cosmic ray; Electromagnetic particle detectors; KM2A; LHAASO
International Standard Serial Number (ISSN)
0168-9002
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
11 Jun 2021

Comments
National Natural Science Foundation of China, Grant 11635011