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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Scintillator ageing of the T2K near detectors from 2010 to 2021
AU - The T2K Collaboration
AU - Abe, K.
AU - Akhlaq, N.
AU - Akutsu, R.
AU - Ali, A.
AU - Alt, C.
AU - Andreopoulos, C.
AU - Antonova, M.
AU - Aoki, S.
AU - Arihara, T.
AU - Asada, Y.
AU - Ashida, Y.
AU - Atkin, E. T.
AU - Ban, S.
AU - Barbi, M.
AU - Barker, G. J.
AU - Barr, G.
AU - Barrow, D.
AU - Batkiewicz-Kwasniak, M.
AU - Bench, F.
AU - Berardi, V.
AU - Berns, L.
AU - Bhadra, S.
AU - Blanchet, A.
AU - Blondel, A.
AU - Bolognesi, S.
AU - Bonus, T.
AU - Bordoni, S.
AU - Boyd, S. B.
AU - Bravar, A.
AU - Bronner, C.
AU - Bron, S.
AU - Bubak, A.
AU - Buizza Avanzini, M.
AU - Calabria, N. F.
AU - Cao, S.
AU - Carter, A. J.
AU - Cartwright, S. L.
AU - Catanesi, M. G.
AU - Cervera, A.
AU - Dealtry, T.
AU - Doyle, T. A.
AU - Finch, A. J.
AU - Kormos, L. L.
AU - Lamers James, M.
AU - Lamont, I.
AU - Lawe, M.
AU - O'Keeffe, H. M.
AU - Ratoff, P. N.
AU - Walsh, J. G.
AU - Xu, Y. H.
PY - 2022/10/17
Y1 - 2022/10/17
N2 - 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.
AB - 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.
KW - Gamma detectors (scintillators, CZT, HPGe, HgI etc)
KW - Neutrino detectors
KW - Performance of High Energy Physics Detectors
KW - Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
U2 - 10.1088/1748-0221/17/10/P10028
DO - 10.1088/1748-0221/17/10/P10028
M3 - Journal article
AN - SCOPUS:85141098028
VL - 17
JO - Journal of Instrumentation
JF - Journal of Instrumentation
SN - 1748-0221
IS - 10
M1 - P10028
ER -