Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 32: Neutrinophysik X
T 32.4: Talk
Tuesday, March 20, 2018, 17:20–17:35, Z6 - HS 0.002
Waveform Reconstruction for IBD and Muon Events in JUNO — •Michaela Schever1,2, Yaping Cheng1, Christoph Genster1,2, Philipp Kampmann1,2, Livia Ludhova1,2, Rikhav Shah1,2, Achim Stahl2, Christopher Wiebusch2, and Yu Xu1,2 — 1IKP-2 Forschungszentrum Jülich — 2III. Physikalisches Institut B, RWTH Aachen University
The JUNO 20 kton liquid-scintillator detector aims at achieving an outstanding energy resolution of 3%/√E(MeV) of Inverse Beta Decay (IBD) events to determine the neutrino mass hierarchy at the desired statistical significance of > 3σ. Therefore, the charge and arrival times of individual photons detected by each single PMT have to be reconstructed with great precision. To ensure a low dead time for this large scale detector, the suppression of the cosmic muon background is performed by partial volume veto, which relies on the precise reconstruction of the first hit time and charge of the muon signals in each PMT.
The talk presents the current status of the waveform analysis for MeV neutrino and muon events in Germany. The IBD waveform study is based on the deconvolution method, which unfolds the photo-electron hit pattern and the single photo-electron response via transforms of the signal between the time and frequency domain. The results of IBD photo-electron reconstruction and several reconstruction methods for the first hit time of muons and the corresponding charge are presented.