Database system for managing 20,000 20-inch PMTs at JUNO

Wang, Jun; Анфимов, Н.; Guo, Jingyuan; Gu, Yu; Hu, H.; Li, Min; Ma, Qiumei; Olshevskiy, A.; Qin, Z. H.; Tietzsch, Alexander; Wonsak, B.; Wang, Wei; Wang, Zhimin; Xu, M.; Xie, Wan; Zhou, You; Zhang, Hai-Qiong; Zhao, Rong

doi:10.1007/s41365-022-01009-x

Cited by 8 publications

(1 citation statement)

References 44 publications

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“…Barcodes representing the PMT ID are used as a keyword to identify all individual records. The management of all PMTs is handled using a database with a web page link [77] following the scheme in Fig. 6, which includes the vendor data of each PMT, inspection results, measurement records of both container and scanning station systems, measurement results management, waterproof potting status, potted PMT testing results, and storage location in individual charts, everything tagged by the individual unique PMT ID.…”

Section: Receiving Cataloging and Testing Proceduresmentioning

confidence: 99%

Mass Testing and Characterization of 20-inch PMTs for JUNO

Abusleme,

Adam,

Ahmad

et al. 2022

Preprint

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Main goal of the JUNO experiment is to determine the neutrino mass ordering using a 20 kt liquid-scintillator detector. Its key feature is an excellent energy resolution of at least 3 % at 1 MeV, for which its instruments need to meet a certain quality and thus have to be fully characterized. More than 20,000 20-inch PMTs have been received and assessed by JUNO after a detailed testing program which began in 2017 and elapsed for about four years. Based on this mass characterization and a set of specific requirements, a good quality of all accepted PMTs could be ascertained. This paper presents the performed testing procedure with the designed testing systems as well as the statistical characteristics of all 20inch PMTs intended to be used in the JUNO experiment, covering more than fifteen performance parameters including the photocathode uniformity. This constitutes the largest sample of 20-inch PMTs ever produced and studied in detail to date, i.e. 15,000 of the newly developed 20inch MCP-PMTs from Northern Night Vision Technology Co. (NNVT) and 5,000 of dynode PMTs from Hamamatsu Photonics K. K.(HPK).

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Section: Receiving Cataloging and Testing Proceduresmentioning

confidence: 99%