Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 44: Neutrino physics without accelerators V
T 44.10: Talk
Tuesday, March 16, 2021, 18:20–18:35, Ts
Measuring the Fluorescence Time Profile of the JUNO Scintillator with Gamma and Neutron Excitation — •Matthias Raphael Stock1, Hans Th. J. Steiger1,2, Lothar Oberauer1, David Dörflinger1, Ulrike Fahrendholz1, Konstantin Schweizer1, Andreas Steiger1, and Ludwig Wallner1 — 1Physik-Department, Technische Universität München (TUM), James-Franck-Straße 1, 85748 Garching bei München — 2Cluster of Excellence PRISMA+, Johannes Gutenberg University Mainz (JGU), Staudingerweg 9, D-55128 Mainz
Major science goals of the Jiangmen Underground Neutrino Observatory (JUNO) in China are the determination of the neutrino mass ordering and precise measurements of the oscillation parameters as well as the search for proton decay and the detection of the diffuse supernova neutrino background. THEIA is a planned 100 kt detector using a water-based liquid scintillator (WbLS) and has a broad science program, e.g., investigating long-baseline neutrino physics. Therefore, we evaluate the pulse shape discrimination performance of liquid scintillators (LSs) using excitation by gamma radiation inducing recoil electrons as well as a pulsed neutron beam inducing recoil protons. We developed an experimental setup to characterize the time distribution of light emission for different and novel LS mixtures. We present the fluorescence time profiles of the JUNO LS, obtained during two beam times at the Maier-Leibnitz-Laboratorium. This work is supported by the DFG Research Unit "JUNO"(FOR 2319) and by the BMBF (Verbundprojekt 05H2018: R&D Detectors and Scintillators).