Characterization of the 20-inch Photomultiplier Tubes for RENE Detector

Junkyo Oh; Byeongsu Yang; Cheong Heo; Daeun Jung; Dong Ho Moon; Eungyu Yun; Hyun Woo Park; Jae Sik Lee; Jisu Park; Ji Young Choi; Kyung Kwang Joo; Ryeong Gyoon Park; Sang Yong Kim; Sunkyu Lee; Insung Yeo; Myoung Youl Pac; Jee-Seung Jang; Eun-Joo Kim; Hyunho Hwang; Junghwan Goh; Wonsang Hwang; Jiwon Ryu; Jungsic Park; Kyu Jung Bae; SeoBeom Hong; Hyunsoo Kim; Dojin Kim; Jonghee Yoo; Seunghwan Choi; Wonjun Lee; Jubin Park; Myung-Ki Cheoun; Intae Yu

arXiv · 2604.11727

Characterization of the 20-inch Photomultiplier Tubes for RENE Detector

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Abstract

To address the Reactor Antineutrino Anomaly (RAA) observed in neutrino experiments, the Reactor Experiment for Neutrino and Exotics (RENE) has been initiated using a liquid scintillation detector. In this study, we investigate the characteristics of two 20-inch Hamamatsu R12860 photomultiplier tubes (PMTs) intended for installation in the RENE detector. The charge and timing responses of the PMTs were evaluated at both the nominal and target gains expected during actual operation. In particular, gain non-uniformity arising from the large-diameter photocathode with a box-and-line type dynode structure was examined, and the maximum gain variation was measured. The occurrence rate, timing, and charge distributions of late pulses and afterpulses were also investigated to characterize the specific response features of the R12860 PMT. The results reported in this study will aid in the interpretation of signals from the RENE detector and serve as a reference for estimating potential systematic uncertainties in RENE data. Furthermore, these findings are expected to provide valuable information for other experiments employing the same type of PMTs.

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Junkyo Oh, Byeongsu Yang, Cheong Heo, Daeun Jung, Dong Ho Moon, Eungyu Yun, Hyun Woo Park, Jae Sik Lee, Jisu Park, Ji Young Choi, Kyung Kwang Joo, Ryeong Gyoon Park, Sang Yong Kim, Sunkyu Lee, Insung Yeo, Myoung Youl Pac, Jee-Seung Jang, Eun-Joo Kim, Hyunho Hwang, Junghwan Goh, Wonsang Hwang, Jiwon Ryu, Jungsic Park, Kyu Jung Bae, SeoBeom Hong, Hyunsoo Kim, Dojin Kim, Jonghee Yoo, Seunghwan Choi, Wonjun Lee, Jubin Park, Myung-Ki Cheoun, Intae Yu. 2026-04-13. Characterization of the 20-inch Photomultiplier Tubes for RENE Detector. https://arxiv.org/abs/2604.11727

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