Calibration and monitoring of LHAASO-KM2A muon detectors with muon decay events

Zuo, Xin; Xiao, Gang; Feng, S. H.; Li, Xiurong; Liu, Cong; Cheng, Ning; Hong, B.; Chang, J. F.; Wang, Wei; Gu, M. H.; Li, Fēi; Liu, Jia; Lv, Hongkui; Sheng, X. D.; Zhang, Shaoru; Li, Hongming; Gong, Guanghua; He, H. H.; Saeed, Mohsin Hassan

doi:10.1016/j.nima.2017.10.024

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…When a high energy muon passes through the water, it will generate a large number of photons, and these photons will be gradually absorbed by water and reflected by inner layer of the liner, then a part of the photons will reach the PMT by one reflection or several reflections to form a signal. The trailing edge of the wave can be fitted with an exponential function, in which decay time is determined by water absorption length of ultra-pure water and reflectivity of the liner [13]. A new method using muon decay events to calibrate and monitor MDs has been established in an earlier study [14].…”

Section: Test Of MDmentioning

confidence: 99%

Chapter 1 LHAASO Instruments and Detector technology *

Cao

et al. 2022

Chinese Phys. C

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The Large High Altitude Air Shower Observatory ( LHAASO ) ( Fig. 1 ) is located at Mt. Haizi (4410 m a.s.l., 600 g/cm2, 29◦ 21’ 27.56” N, 100◦ 08’ 19.66” E) in Daocheng, Sichuan province, P.R. China. LHAASO consists of 1.3 km2 array ( KM2A ) of electromagnetic particle detectors ( ED ) and muon detectors ( MD ), a water Cherenkov detector array ( WCDA ) with a total active area of 78,000 m2, 18 wide field-of-view air Cherenkov telescopes (WFCTA ) and a newly proposed electron-neutron detector array ( ENDA ) covering 10,000 m2. Each detector is synchronized with all the other through a clock synchronization network based on the White Rabbit protocol. The observatory includes an IT center which comprises the data acquisition system and trigger system, the data analysis facility. In the following of this Chapter, all the above mentioned components of LHAASO will be briefly described, together with infrastructure which is a fundamental component of the LHAASO observatory.

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Section: Test Of MDmentioning

confidence: 99%

Chapter 1 LHAASO Instruments and Detector technology *

Cao

et al. 2022

Chinese Phys. C

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“…The air Cherenkov telescopes use the shape of the Cherenkov image to discriminate γ-rays and hadrons. Water Cherenkov detectors, such as the HAWC and LHAASO-WCDA [25], take advantage of the different lateral distributions of showers.…”

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Optimization of performance of the KM2A full array using the Crab Nebula*

Cao 曹,

Aharonian,

An 安

et al. 2024

Chinese Phys. C

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The full array of the Large High Altitude Air Shower Observatory (LHAASO) has been in operation since July 2021. For its kilometer-square array (KM2A), we have optimized the selection criteria for very high and ultra-high energy $\gamma$-rays, using the data collected from August 2021 to August 2022, resulting in an improvement on significance of the detection in the Crab Nebula of about 15$\%$ compared with previous cuts. With the implementation of these new selection criteria, the angular resolution is also significantly improved by approximately 10$\%$ at tens of TeV. Other aspects of the full KM2A array performance, such as the pointing error are also calibrated using the Crab Nebula. The resulting energy spectrum of the Crab Nebula in the energy range of 10-1000 TeV can be well fitted by a log-parabola model, which is consistent with the previous results from LHAASO and other experiments.

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High dynamic range base design and characterization of an 8-inch photomultiplier tube CR365-02-2 for the LHAASO-MD experiment

Jiang

Zhao

et al. 2022

Nuclear Instruments and Methods in Physics Research Section A:

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Calibration and monitoring of LHAASO-KM2A muon detectors with muon decay events

Cited by 3 publications

References 14 publications

Chapter 1 LHAASO Instruments and Detector technology *

Chapter 1 LHAASO Instruments and Detector technology *

Optimization of performance of the KM2A full array using the Crab Nebula*

High dynamic range base design and characterization of an 8-inch photomultiplier tube CR365-02-2 for the LHAASO-MD experiment

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