Aging behavior of large area MCP–PMT

Wang, Wenwen; Qian, S.; Qi, M.; Xia, Jingkai; Cheng, Yaping; Ning, Z.; Yuekun, Heng; Liu, Shulin; Si, Shubin; Sun, Jianning; Liu, Dong; Wang, Xingchao; Huang, Guanglin; Tian, Jing-Shou; Wei, Yueguang; Liu, Hulin; Li, Weihua; Wang, Xing; Xin, Liwei

doi:10.1007/s41365-016-0046-1

Cited by 7 publications

(4 citation statements)

References 10 publications

(14 reference statements)

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“…No obvious degradation on the DCR and measured light intensity are identified till now (≤0.0002/day, within the monitoring uncertainty), while the monitored gain of group 1 (output charge up to max. 19.6 C in total) shows a clear decreasing trend of 0.001/day (monitoring uncertainty 0.0002/day), which is as expected from the aging of the MCP plates [30,32,[95][96][97][98]. On the other hand, the monitored gain of other groups hints at a decreasing trend of ∼0.0002/day (monitoring uncertainty 0.0002/day), which still needs further monitoring.…”

Section: Pmt Long Term Stabilitymentioning

confidence: 54%

“…Lots of studies are performed on the MCP or MCP-PMT lifetime, even with ALD protections [30][31][32]95]. Concerning this issue, some R&D work had been done in [96], providing an expectation for a use over 20 years under JUNO conditions: maximum anode output charge is about 54.6 C (assuming a gain of 1 × 10 7 , ∼50 kHz p.e.s from dark noise and signals per PMT, ∼4 Hz muon through JUNO CD LS and averaged ∼1,000 p.e.s per single PMT per muon). At Zhongshan Pan-Asia 20-inch PMT testing and potting station, the container #C (as previously discussed) is re-configured to test the aging effect of HPK and NNVT PMTs under different configurations.…”

Section: Pmt Long Term Stabilitymentioning

confidence: 99%

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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: Pmt Long Term Stabilitymentioning

confidence: 54%

Section: Pmt Long Term Stabilitymentioning

confidence: 99%

Mass Testing and Characterization of 20-inch PMTs for JUNO

Abusleme,

Adam,

Ahmad

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

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“…So it is very important to study the aging [2] behaviour of PMTs. According to previous researches, for 8-inch MCP-PMTs (Photomultiplier tube base on microchannel plate) working at a gain of 10 7 , when operated by nearly 1000 photoelectrons per pulse, the gain [3] will decrease by 30% when the cumulative output charge is 17.5 C. For 20-inch MCP-PMTs [4], the gain decreased by 70% when the anode cumulative output charge reached 60 C under the same test conditions. For the 20-inch high-quantum-efficiency MCP-PMT (HQE-MCP-PMT) [5][6][7][8][9] which will be employed in JUNO [10], the aging behavior has not been studied yet.…”

Section: Introductionmentioning

confidence: 90%

Study on the stability of 20 inch photomultiplier tubes based on microchannel plate

Qian

Ning

et al. 2021

J. Inst.

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The normal working stability of 20-inch MCP-PMTs are studied by random triggering, in this paper. The variation of dark counting rate and gain in the long-term (∼400 days) aging process is mainly analyzed. It is found that the variation trend of the dark counting rate is consistent with the temperature, and the dark counting rate increases by about 15%/∘C at room temperature (20–28∘C). Moreover, the gain of PMTs began to decline after 5 months of continuous operation. After the gain is reduced by about 15%, the gain reaches a steady state.

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“…Besides the routine performance parameters results for the 15k MCP-PMTs which are listed in ref. [17], the aging behaviour [21], the after-pulse distribution [22], the flasher signal [23] and the temperature effect on the gain, dark count and TTS [24] for the MCP-PMT for JUNO are all detailly studied.…”

Section: Performance Of the 15k Mcp-pmts For Junomentioning

confidence: 99%

Summary of the R&D of 20-inch MCP-PMTs for neutrino detection

Qian

Cao³

et al. 2021

J. Inst.

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The Jiangmen Underground Neutrino Observatory (JUNO) in China aiming to determine the neutrino mass hierarchy is under construction. A new kind of large area microchannel-plate photomultiplier tube (MCP-PMT) was put forward for the JUNO by the researchers in Institute of High Energy Physics (IHEP) in China. After breaking through several core technotical barriers, the 20-inch MCP-PMT prototype with great performance was successfully produced by the MCP-PMT group in China and got 75% PMT orders (15,000 pics) from JUNO. The mass production line and batch test system was completed in North Night Vision Technology Co., Ltd. (NNVT). The performance of the MCP-PMT including the gain, the quantum efficiency, the P/V ratio, the dark count rate and the transit time spread can be batch tested. During the mass production process, the technical progress in the cathode deposition method improved the quantum efficiency of the photocathode from 30% to 35%. The aging behaviour, temperature effect, the after-pulse distribution and the flash signal of the 20-inch MCP-PMT are all detailly studied. By August of 2020, the 15,000 MCP-PMTs, which will be installed as the central liquid scintillator detector of JUNO, have been completed and delivered to Jiangmen. The average QE at 400 nm for the 15,000 pieces of MCP-PMTs is 32%.

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Aging behavior of large area MCP–PMT

Cited by 7 publications

References 10 publications

Mass Testing and Characterization of 20-inch PMTs for JUNO

Mass Testing and Characterization of 20-inch PMTs for JUNO

Study on the stability of 20 inch photomultiplier tubes based on microchannel plate

Summary of the R&D of 20-inch MCP-PMTs for neutrino detection

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