Customized calibration sources in the JUNO experiment

We customized a laser calibration system and four radioactive γ -ray calibration sources for the Jiangmen Underground Neutrino Observatory (JUNO), a 20-kton liquid scintillator-based neutrino detector. The laser source system was updated to realize the isotropic light emission timing within ±0.25 ns...

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Bibliographic Details
Published in:Journal of instrumentation 2024-12, Vol.19 (12), p.P12019
Main Authors: Takenaka, A., Hui, J., Li, R., Hao, S., Huang, J., Lai, H., Li, Y., Liu, J., Meng, Y., Qian, Z., Wang, H., Xiang, Z., Yuan, Z., Yun, Y., Zhang, F., Zhang, T., Zhang, Y.
Format: Article
Language:English
Subjects:
Calibration
Customization
Detector alignment and calibration methods (lasers, sources, particle-beams)
Gamma detectors (scintillators, CZT, HPGe, HgI etc)
Lasers
Light emission
Neutrino detectors
Neutrinos
Radioactivity
Radium 226
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Description
Summary:We customized a laser calibration system and four radioactive γ -ray calibration sources for the Jiangmen Underground Neutrino Observatory (JUNO), a 20-kton liquid scintillator-based neutrino detector. The laser source system was updated to realize the isotropic light emission timing within ±0.25 nsec level and to allow the tuning of the laser intensity covering more than four orders of magnitude. In addition, methods to prepare four different radioactive sources ( 18 F, 40 K, 226 Ra, and 241 Am), covering energies from 0 (10) keV to 0 (1) MeV, for the JUNO detector were established in this study. The radioactivity of each source and the risk of radioactive substance leaking into the detector from the source were confirmed to meet the experimental requirements.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/19/12/P12019