Mass production and characterization of 3-inch PMTs for the JUNO experiment

Cao, Chuanya; Xu, Jilei; He, M.; Abusleme, Angel; Bongrand, M.; Bordereau, Clément; Bretón, D.; Cabrera, A.; Campeny, Agustín; Cerna, C.; Chen, Haoqiang; Chen, Po–An; Claverie, Gérard; Lorenzo, Selma Conforti Di; Taille, C. De La; Druillole, F.; Fournier, Amélie; Grassi, M.; Gu, Xiaofei; Haacke, M.; Han, Yang; Hellmuth, Patrick; Heng, Y. K.; Herrera, Rafael; Hsiung, Y.; Hu, Bei-Zhen; Huang, Yongbo; Huss, Cédric; Jeria, Ignacio; Jing, Xiaoping; Jollet, C.; Lebrin, Victor; Lefèvre, F.; Li, Hongwei; Li, Nan; Liu, Hongbang; Liu, Xiwen; Lu, Shuxiang; Лубсандоржиев, Б.; Lubsandorzhiev, Sultim; Lukanov, Arslan; Maalmi, Jihane; Meregaglia, A.; Navas-Nicolás, D.; Ochoa-Ricoux, J. P.; Perrot, F.; Rajan, Rebin Karaparambil; Rebii, Abdel; Roskovec, B.; Santos, C.; Settimo, M.; Sidorenkov, A.; Tkachev, I.; Troni, Giancarlo; Ушаков, Н.; Vanroyen, Guillaume; Viaud, B.; Воронин, Д.; Walker, Pablo; Wang, Chung-Hsiang; Wang, Zhimin; Wu, Diru; Xu, Hangkun; Xu, M.; Yang, Chengfeng; Yang, Jie; Yermia, F.; Zhang, Xuantong

doi:10.1016/j.nima.2021.165347

Cited by 24 publications

(25 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…veto PMTs with respect to "signal" PMTs), the glass contributions for the different LPMTs are listed separately. Finally, the signal readout simulations for both the LPMT and the SPMT systems were done separately for the components sitting on the back of the photomultipliers (divider and potting) and for the electronics boards placed in the under water boxes (UWBs) [2].…”

Section: Comparative Impact Of Materials Contaminationsmentioning

confidence: 99%

“…A huge R&D effort was put by the NNVT company, in close cooperation with the JUNO collaboration, into controlling all glass production steps to reach the subscribed limits [28]. Gamma spectroscopy measurements on few glass bulb specimens were also performed with different HPGe detectors to verify compliance of both Hamamatsu LPMT glass and HZC Photonics SPMT glass [29] with the impurity concentration requirements during the mass production.…”

Section: Jhep11(2021)102mentioning

confidence: 99%

“…The Jiangmen Underground Neutrino Observatory (JUNO) [1,2] is a multipurpose experiment primarily designed to determine the neutrino mass ordering and precisely measure the neutrino oscillation parameters by detecting reactor anti-neutrinos. It is being built in the south of China at about 53 km distance from the Yangjiang and Taishan nuclear power plants, to allow the contemporary study of the solar and atmospheric neutrino oscillation sectors.…”

Section: Introductionmentioning

confidence: 99%

“…1800 m.w.e. At this depth, the muon flux at JUNO site is of about 0.004 Hz/m 2 with a mean energy of 207 GeV [2]. Hence a water Cherenkov detector is placed around the LS in order to detect and reject the muons.…”

Section: Introductionmentioning

confidence: 99%

“…Geoneutrinos, produced by 232 Th and 238 U radioactive decay chains inside the Earth, are both a background for reactor anti-neutrinos due to the same interaction channel (IBD) and one of the JUNO physics cases. All these background sources (cosmogenics and geoneutrinos), which are related to experimental site location, are discussed elsewhere [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Radioactivity control strategy for the JUNO detector

Abusleme

Adam

Ahmad

et al. 2021

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

JUNO is a massive liquid scintillator detector with a primary scientific goal of determining the neutrino mass ordering by studying the oscillated anti-neutrino flux coming from two nuclear power plants at 53 km distance. The expected signal anti-neutrino interaction rate is only 60 counts per day (cpd), therefore a careful control of the background sources due to radioactivity is critical. In particular, natural radioactivity present in all materials and in the environment represents a serious issue that could impair the sensitivity of the experiment if appropriate countermeasures were not foreseen. In this paper we discuss the background reduction strategies undertaken by the JUNO collaboration to reduce at minimum the impact of natural radioactivity. We describe our efforts for an optimized experimental design, a careful material screening and accurate detector production handling, and a constant control of the expected results through a meticulous Monte Carlo simulation program. We show that all these actions should allow us to keep the background count rate safely below the target value of 10 Hz (i.e. ∼1 cpd accidental background) in the default fiducial volume, above an energy threshold of 0.7 MeV.

show abstract

Section: Comparative Impact Of Materials Contaminationsmentioning

confidence: 99%

Section: Jhep11(2021)102mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations