Study of polysterene based scintillator ageing in the DANSS experiment

• Published in: Journal of instrumentation Vol. 19; no. 4; p. P04031
• Main Authors: Alekseev, I., Belov, V., Bystryakov, A., Danilov, M., Filosofov, D., Fomina, M., Gorovtsov, P., Iusko, Ye, Kazartsev, S., Kobyakin, A., Krapiva, A., Kuznetsov, A., Mashin, N., Machikhiliyan, I., Medvedev, D., Nesterov, V., Ponomarev, D., Rozova, I., Rumyantseva, N., Rusinov, V., Salamatin, A., Samigullin, E., Shevchik, Ye, Shirchenko, M., Shitov, Yu, Skrobova, N., Svirida, D., Tarkovsky, E., Yakovleva, A., Yakushev, E., Zhitnikov, I., Zinatulina, D.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2024
• Subjects: Antineutrinos; Neutrino detectors; Polystyrene resins; Scintillation counters; Scintillators and scintillating fibres and light guides; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/19/04/P04031

Abstract DANSS is a spectrometer for reactor antineutrinos based on plastic scintillator. The sensitive volume of the detector is made of 2500 polystyrene based scintillator plates with wavelength shifting (WLS) fiber readout (strips). We present a study of the light yield of strips during 6.5 years of DANSS continuous running. Overall ageing at the rate 0.55 ± 0.05 (syst.) % per year is observed that is considerably smaller than in other similar experiments. We also observe the WLS fiber attenuation length shortening at the rate 0.26 ± 0.04(stat.) % per year.