A novel PMT test system based on waveform sampling

Yin, Shankai; Ma, Lishuang; Ning, Z.; Qian, S.; Wang, Y.; Jiang, Xiaoming; Wang, Z.; Yu, B. X.; Gao, Fei; Zhu, Yujie

doi:10.1088/1748-0221/13/01/t01005

Cited by 10 publications

(9 citation statements)

References 6 publications

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“…19a, where the averaged values now increased to 28.5 % for the HPK PMTs and 30.1 % for NNVT PMTs. The average PDE of the qualified NNVT low-QE PMTs was updated to 27.3 %, and 31.3 % for the qualified NNVT high-QE PMTs respectively 21 , as shown in Fig. 19b.…”

Section: Light System Aging and Pde Correctionmentioning

confidence: 99%

“…Concerning the mechanical safety which is relevant for the large vacuum glass bulbs of PMTs working in pure water at a maximum depth of 44 m, a careful inspection is performed on each PMT to identify any mechanical/structural defects. Furthermore, following many valuable, previously performed studies on different PMT parameters, such as general studies on the large area PMT performance [19][20][21][22][23][24][25], temperature effects [26][27][28][29], and the lifetime of the newly developed MCP-PMT by Northern Night Vision Technology Co. (NNVT) [30][31][32][33], follow-up studies on the DCR as a function of temperature and the long-term stability of the MCP-PMTs are evaluated.…”

Section: Introductionmentioning

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: Light System Aging and Pde Correctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mass Testing and Characterization of 20-inch PMTs for JUNO

Abusleme,

Adam,

Ahmad

et al. 2022

Preprint

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“…The model of this LT-Dis is N840 from CAEN. Then, a FlashADC (FADC, DT5751) from CAEN was used to sample the waveforms [29].…”

Section: Experimental System 21 Measurement Systemmentioning

confidence: 99%

Study on SiPM performance at low temperatures between -60°C and -20°C

et al. 2022

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Radon is the main background source of dark matter and neutrino experiments. Radon concentration (mBq/m3) measurement by liquid scintillation detector is a highly sensitive method at low temperatures using silicon photomultipliers (SiPMs) arrays. The SiPM performance characteristics are closely related to the lower detection limit of the detector. In this study, we built an automatic and accurate low-temperature measurement system to study the single photoelectron (SPE) spectrum, SPE resolution, optical crosstalk, and after-pulse of the SiPM at different temperatures. As a result, we obtained the variation trend of the SiPM parameters at different temperatures, and the SiPM optimal working conditions were obtained, which can improve the detector's sensitivity.

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“…Photomultiplier tubes (PMTs) are extensively utilized in particle physics experiments that require single-photon-sensitive light detection, such as Super-K [1,2], KamLAND [3], SNO [4], IceCube [5], Double Chooz [6], Daya Bay [7], and RENO [8]. The performance and characterization of PMTs have been extensively studied and well-understood [9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Dark count of 20-inch PMTs generated by natural radioactivity

Zhang,

Wang,

et al. 2024

J. Inst.

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The primary objective of the JUNO experiment is to determine the ordering of neutrino masses using a 20-kton liquid-scintillator detector. The 20-inch photomultiplier tube (PMT) plays a crucial role in achieving excellent energy resolution of at least 3 % at 1 MeV. Understanding the characteristics and features of the PMT is vital for comprehending the detector's performance, particularly regarding the occurrence of large pulses in PMT dark counts. This research paper aims to further investigate the origin of these large pulses in the 20-inch PMT dark count through measurements and simulations. Our results confirm that natural radioactivity and muons striking the PMT glass are the main sources of the large pulses. We evaluate their contribution quantitatively by performing spectrum fitting. By analyzing the PMT dark count spectrum, it becomes possible to roughly estimate the radioactivity levels in the surrounding environment.

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A novel PMT test system based on waveform sampling

Cited by 10 publications

References 6 publications

Mass Testing and Characterization of 20-inch PMTs for JUNO

Mass Testing and Characterization of 20-inch PMTs for JUNO

Study on SiPM performance at low temperatures between -60°C and -20°C

Dark count of 20-inch PMTs generated by natural radioactivity

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