Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 57: Neutrino physics 7
T 57.2: Vortrag
Mittwoch, 6. März 2024, 16:15–16:30, Geb. 30.21: Gerthsen-HS
Time Profile Measurements of the Cooled TAO Liquid Scintillator — •Matthias Raphael Stock1, Hans Th. J. Steiger1,2, Manuel Böhles2, David Dörflinger1, Ulrike Fahrendholz1, Meishu Lu1, Lothar Oberauer1, and Korbinian Stangler1 — 1Technical University of Munich, TUM School of Natural Sciences, Physics Department, James-Franck-Str. 1, 85748 Garching — 2Johannes Gutenberg University Mainz, Cluster of Excellence PRISMA+, Staudingerweg 9, 55128 Mainz
The main physics goal of Jiangmen Underground Neutrino Observatory (JUNO) is the determination of the neutrino mass ordering by the detection of the oscillated electron antineutrino energy spectrum from reactors at medium-baselines. JUNO will have a satellite detector called Taishan Antineutrino Observatory (JUNO-TAO) to measure the unoscillated spectrum at unprecedented resolution. The novel detector technologies require TAO to have an operation temperature of minus 50 degrees. We studied the fluorescence time profile of the TAO liquid scintillator at room and cold temperatures. We performed measurements using radioactive sources and pulsed neutron beams of different energies at the CN accelerator of INFN Laboratori Nazionali di Legnaro. Different time profiles after recoil electron and recoil proton excitation allow to perform pulse shape discrimination and therefore advance the ability to distinguish the neutrino signal from background.
This work is supported by the Collaborative Research Center NDM (SFB 1258), the DFG Research Units 2319 and 5519, and the Clusters of Excellence PRISMA+ and Origins.