Comparison on PMT Waveform Reconstructions with JUNO Prototype

Abstract

JUNO is proposed to determine the neutrino mass hierarchy and rich in many other neutrino topics. A prototype is designed and set up for better understanding sub-systems of future detector. The preliminary results show that its threshold reaches ~0.3MeV with trigger rate ~290 Hz on the ground with cosmic muon rate ~35 Hz. Aiming for a better detector understanding from PMT signal, three reconstruction algorithms are compared for PMT waveforms with different overshoot ratios, including charge integration, waveform fitting, and deconvolution. It is concluded that the three methods have similar performance on uncertainty and systematic bias while deconvolution algorithm is best to handle larger overshoot and the simplest charge integration could be considered with controlled overshoot for future fast preliminary reconstruction.

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• Performance evaluation of the 8-inch MCP-PMT for Jinping Neutrino Experiment
• Check on the features of potted 20-inch PMTs with 1F3 electronics prototype at Pan-Asia
• The Fast Stochastic Matching Pursuit for Neutrino and Dark Matter Experiments