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Title: Performance test of the electromagnetic particle detectors for the LHAASO experiment
Authors: F. Aharonian
Q. An
L. X. Bai
Y. X. Bai
Y. W. Bao
D. Bastieri
X. J. Bi
Y. J. Bi
H. Cai
J. T. Cai
Z. Cao
J. Chang
J. F. Chang
X. C. Chang
B. M. Chen
J. Chen
L. Chen
M. J. Chen
M. L. Chen
Q. H. Chen
S. H. Chen
S. Z. Chen
T. L. Chen
X. L. Chen
Y. Chen
N. Cheng
Y. D. Cheng
S. W. Cui
X. H. Cui
Y. D. Cui
B. Z. Dai
H. L. Dai
Z. G. Dai
D. della Volpe
B. D'Ettorre Piazzoli
X. J. Dong
J. H. Fan
Y. Z. Fan
Z. X. Fan
J. Fang
K. Fang
C. F. Feng
L. Feng
S. H. Feng
Y. L. Feng
B. Gao
C. D. Gao
Q. Gao
W. Gao
M. M. Ge
L. S. Geng
G. H. Gong
Q. B. Gou
M. H. Gu
J. G. Guo
X. L. Guo
Y. Q. Guo
Y. Y. Guo
Y. A. Han
H. H. He
H. N. He
J. C. He
S. L. He
X. B. He
Y. He
M. Heller
Y. K. Hor
C. Hou
X. Hou
H. B. Hu
S. Hu
S. C. Hu
X. J. Hu
D. H. Huang
Q. L. Huang
W. H. Huang
X. T. Huang
Z. C. Huang
F. Ji
X. L. Ji
H. Y. Jia
K. Jia
K. Jiang
Z. J. Jiang
C. Jin
D. Kuleshov
K. Levochkin
B. Li
B. B. Li
C. Li
F. Li
H. Li
H. B. Li
H. C. Li
H. Y. Li
J. Li
K. Li
W. L. Li
State Key Laboratory of Particle Detection & Electronics
Nanjing University
Shanghai Astronomical Observatory Chinese Academy of Sciences
Institute for Nuclear Research of the Russian Academy of Sciences
Shandong University
Wuhan University
Yunnan University
Institute of High Energy Physics Chinese Academy of Science
University of Chinese Academy of Sciences
Yantai University
Guangzhou University
Tsinghua University
Sun Yat-Sen University
University of Science and Technology of China
Zhengzhou University
Dublin Institute for Advanced Studies
Università degli Studi di Napoli Federico II
Sichuan University
National Astronomical Observatories Chinese Academy of Sciences
Max-Planck-Institut für Kernphysik
Southwest Jiaotong University
Purple Mountain Observatory Chinese Academy of Sciences
Université de Genève
Hebei Normal University
Tibet University
TIANFU Cosmic Ray Research Center
Keywords: Physics and Astronomy
Issue Date: 11-Jun-2021
Citation: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Vol.1001, (2021)
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 thousands 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.
ISSN: 01689002
Appears in Collections:Scopus 2021

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