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Abe, K, Akhlaq, N, Akutsu, R, Ali, A, Alt, C, Andreopoulos, C, Antonova, M, Aoki, S, Arihara, T, Asada, Y et al (show 352 more authors) , Ashida, Y, Atkin, ET, Ban, S, Barbi, M, Barker, GJ, Barr, G, Barrow, D, Batkiewicz-Kwasniak, M, Bench, F, Berardi, V, Berns, L, Bhadra, S, Blanchet, A, Blondel, A, Bolognesi, S, Bonus, T, Bordoni, S, Boyd, SB, Bravar, A, Bronner, C, Bron, S, Bubak, A, Buizza Avanzini, M, Calabria, NF, Cao, S, Carter, AJ, Cartwright, SL, Catanesi, MG, Cervera, A, Chakrani, J, Cherdack, D, Christodoulou, G, Cicerchia, M, Coleman, J 
ORCID: 0000-0003-1319-0889, Collazuol, G, Cook, L, Cudd, A, Davydov, Yu I, De Roeck, A, De Rosa, G, Dealtry, T, Delogu, CC, Densham, C, Dergacheva, A, Di Lodovico, F, Dolan, S, Douqa, D, Doyle, TA, Drapier, O, Duffy, KE, Dumarchez, J, Dunne, P, Dygnarowicz, K, Eguchi, A, Emery-Schrenk, S, Ershova, A, Fedotov, S, Fernandez, P, Finch, AJ, Fiorentini Aguirre, GA, Fiorillo, G, Friend, M, Fujii, Y, Fukuda, Y, Fusshoeller, K, Giganti, C, Glagolev, V, Gonin, M, Goodman, EAG, Gorin, A, Grassi, M, Guigue, M, Hadley, DR, Haigh, JT, Hamacher-Baumann, P, Harris, DA, Hartz, M, Hasegawa, T, Hassani, S, Hastings, NC, Hatzikoutelis, A, Hayato, Y, Hiramoto, A, Hogan, M, Holeczek, J, Holin, A, Holvey, TJ, Hong Van, NT, Honjo, T, Iacob, F, Ichikawa, AK, Ikeda, M, Ishida, T, Ishitsuka, M, Israel, HT, Ives, SJ, Iwamoto, K, Izmaylov, A, Izumi, N, Jakkapu, M, Jamieson, B, Jenkins, SJ ORCID: 0000-0002-0982-8141, Jesús-Valls, C, Jiang, JJ, Jonsson, P, Jung, CK, Jurj, PB, Kabirnezhad, M, Kaboth, AC, Kajita, T, Kakuno, H, Kameda, J, Kasetti, SP, Kataoka, Y, Katayama, Y, Katori, T, Kawaue, M, Kearns, E, Khabibullin, M, Khotjantsev, A, Kikawa, T, Kikutani, H, King, S, Kisiel, J, Knight, A, Kobata, T, Kobayashi, T, Koch, L, Kogan, G, Konaka, A, Kormos, LL, Koshio, Y, Kostin, A, Kowalik, K, Kudenko, Y, Kuribayashi, S, Kurjata, R, Kutter, T, Kuze, M, La Commara, M, Labarga, L, Lachner, K, Lagoda, J, Lakshmi, SM, Lamers James, M, Lamont, I, Lamoureux, M, Last, D, Latham, N, Laveder, M, Lawe, M, Lee, Y, Lin, C, Lindner, T, Lin, S-K, Litchfield, RP, Liu, SL, Longhin, A, Long, KR, Ludovici, L, Lu, X, Lux, T, Machado, LN, Magaletti, L, Mahn, K, Malek, M, Mandal, M, Manly, S, Marino, AD, Marti-Magro, L, Martin, DGR, Martini, M, Martin, JF, Maruyama, T, Matsubara, T, Matveev, V, Mauger, C, Mavrokoridis, K ORCID: 0000-0002-9244-4519, Mazzucato, E, McCauley, N, McElwee, J, McFarland, KS, McGrew, C, Mefodiev, A, Megias, GD, Mellet, L, Metelko, C, Mezzetto, M, Minamino, A, Mineev, O, Mine, S, Miura, M, Molina Bueno, L, Moriyama, S, Mueller, Th A, Munford, D, Munteanu, L, Nagai, K, Nagai, Y, Nakadaira, T, Nakagiri, K, Nakahata, M, Nakajima, Y, Nakamura, A, Nakamura, H, Nakamura, K, Nakano, Y, Nakayama, S, Nakaya, T, Nakayoshi, K, Naseby, CER, Ngoc, TV, Nguyen, VQ, Niewczas, K, Nishimura, Y, Nishizaki, K, Nova, F, Novella, P, Nugent, JC, O'Keeffe, HM, O'Sullivan, L, Odagawa, T, Ogawa, T, Okada, R, Okumura, K, Okusawa, T, Owen, RA, Oyama, Y, Palladino, V, Paolone, V, Pari, M, Parlone, J, Parsa, S, Pasternak, J, Pavin, M, Payne, D, Penn, GC, Perkin, JD, Pershey, D, Pickering, L, Pidcott, C, Pintaudi, G, Pistillo, C, Popov, B, Porwit, K, Posiadala-Zezula, M, Prabhu, YS, Quilain, B, Radermacher, T, Radicioni, E, Radics, B, Ratoff, PN, Reh, M, Riccio, C, Rondio, E, Roth, S, Rubbia, A, Ruggeri, AC, Ruggles, CA, Rychter, A, Sakashita, K, Sánchez, F, Santucci, G, Schloesser, CM, Scholberg, K, Scott, M, Seiya, Y, Sekiguchi, T, Sekiya, H, Sgalaberna, D, Shaikhiev, A, Shaykina, A, Shiozawa, M, Shorrock, W, Shvartsman, A, Skwarczynski, K, Smy, M, Sobczyk, JT, Sobel, H, Soler, FJP, Sonoda, Y, Spina, R, Su, H, Suslov, IA, Suvorov, S, Suzuki, A, Suzuki, SY, Suzuki, Y, Sztuc, AA, Tada, M, Takayasu, S, Takeda, A, Takeuchi, Y, Tanaka, HK, Tanihara, Y, Tani, M, Tereshchenko, VV, Teshima, N, Thamm, N, Thompson, LF, Toki, W, Touramanis, C ORCID: 0000-0001-5191-2171, Towstego, T, Tsui, KM, Tsukamoto, T, Tzanov, M, Uchida, Y, Vacheret, A, Vagins, M, Vallari, Z, Vargas, D, Vasseur, G, Vilela, C, Vinning, WGS, Vladisavljevic, T, Wachala, T, Waldron, AV, Walsh, JG, Wang, Y, Wan, L, Wark, D, Wascko, MO, Weber, A, Wendell, R, Wilking, MJ, Wilkinson, C, Wilson, JR, Wood, K, Wret, C, Xia, J, Xu, Y-H, Yamamoto, K, Yanagisawa, C, Yang, G, Yano, T, Yasutome, K, Yershov, N, Yevarouskaya, U, Yokoyama, M, Yoshimoto, Y, Yu, M, Zaki, R, Zalewska, A, Zalipska, J, Zaremba, K, Zarnecki, G, Zhao, X, Zhu, T, Ziembicki, M, Zimmerman, ED, Zito, M and Zsoldos, S
(2022)
Scintillator ageing of the T2K near detectors from 2010 to 2021.
Journal of Instrumentation, 17 (10).
P10028-P10028.
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Abstract
<jats:title>Abstract</jats:title>
<jats:p>The T2K experiment widely uses plastic scintillator as a
target for neutrino interactions and an active medium for the
measurement of charged particles produced in neutrino interactions
at its near detector complex. Over 10 years of operation the
measured light yield recorded by the scintillator based subsystems
has been observed to degrade by 0.9–2.2% per year. Extrapolation
of the degradation rate through to 2040 indicates the recorded light
yield should remain above the lower threshold used by the current
reconstruction algorithms for all subsystems. This will allow the
near detectors to continue contributing to important physics
measurements during the T2K-II and Hyper-Kamiokande
eras. Additionally, work to disentangle the degradation of the
plastic scintillator and wavelength shifting fibres shows that the
reduction in light yield can be attributed to the ageing of the
plastic scintillator. The long component of the attenuation length
of the wavelength shifting fibres was observed to degrade by
1.3–5.4% per year, while the short component of the attenuation
length did not show any conclusive degradation.</jats:p>
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