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Yang, Byeong Su
액시온 및 극한상호작용 연구단
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Development of low-background photomultiplier tubes for liquid xenon detectors

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Title
Development of low-background photomultiplier tubes for liquid xenon detectors
Author(s)
Abe, K; Chen, Y; Hiraide, K; Ichimura, K; Imaizumi, S; Kato, N; Kishimoto, Y; Kobayashi, K; Kobayashi, M; Moriyama, S; Nakahata, M; Sato, K; Sekiya, H; Suzuki, T; Takeda, A; Tasaka, S; Yamashita, M; Byeong Su Yang; Nam Young Kim; Yeong duk Kim; Yong Hamb Kim; Ishii, R; Itow, Y; Kanzawa, K; Masuda, K; Martens, K; Mason, A; Suzuki, Y; Miuchi, K; Takeuchi, Y; Lee, KB; Lee, MK; Fukuda, Y; Ogawa, H; Nishijima, K; Fushimi, K; Xu, BD; Nakamura, S
Subject
Noble liquid detectors (scintillation, ionization, double-phase), ; Photon detectors for UV, visible and IR photons (solid-state) (PIN diodes, APDs, Si-PMTs, G-APDs, CCDs, EBCCDs, EMCCDs, CMOS imagers, etc)
Publication Date
2020-09
Journal
JOURNAL OF INSTRUMENTATION, v.15, no.9, pp.P09027
Publisher
IOP PUBLISHING LTD
Abstract
ⓒ2020 IOP Publishing Ltd and Sissa Medialab. We successfully developed a new photomultiplier tube (PMT)with a three-inch diameter, convex-shaped photocathode, R13111. Its prominent features include good performance and ultra-low radioactivity. The convex-shaped photocathode realized a large photon acceptance and good timing resolution. Low radioactivity was achieved by three factors: (1) the glass material was synthesized using low-radioactive-contamination material; (2) the photocathode was produced with K-39-enriched potassium; and (3) the purest grade of aluminum material was used for the vacuum seal. As a result each R13111 PMT contains only about 0.4 mBq of Ra-226, less than 2 mBq of U-238, 0.3 mBq of Ra-228, 2 mBq of K-40 and 0.2 mBq of 60 Co. We also examined and resolved the intrinsic leakage of Xe gas into PMTs that was observed in several older models. We thus succeeded in developing a PMT that has low background, large angular acceptance with high collection efficiency, good timing resolution, and long-term stable operation. These features are highly desirable for experiments searching for rare events beyond the standard model, such as dark matter particle interactions and neutrinoless double beta decay events
URI
https://pr.ibs.re.kr/handle/8788114/7626
DOI
10.1088/1748-0221/15/09/P09027
ISSN
1748-0221
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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