A new method of energy reconstruction for large spherical liquid scintillator detectors

Abstract

Liquid scintillators are commonly used to detect low energy neutrinos from the reactors, sun, and earth. It is a challenge to reconstruct deposited energies for a large liquid scintillator detector. For detectors with multiple optical mediums such as JUNO and SNO+, the prediction of the propagation of detected photons is extremely difficult due to mixed optical processes such as Rayleigh scattering, refraction and total reflection at their boundaries. Calibration based reconstruction methods consume impractical time since a large number of calibration points are required in a giant detector. In this paper, we propose a new model-independent method to reconstruct deposited energies with minimum requirements on the calibration system. This method is validated with JUNO's offline software. Monte Carlo studies show that the energy non-uniformity can be controlled below 1%, which is crucial for JUNO to achieve 3% energy resolution.

arXiv comment12 pages, 9 figures

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Cited by in corpus (6)

• Event vertex and time reconstruction in large volume liquid scintillator detector
• Prediction of Energy Resolution in the JUNO Experiment
• Improving the energy uniformity for large liquid scintillator detectors
• Measurements of Rayleigh Ratios in Linear Alkylbenzene
• Determine Energy Nonlinearity and Resolution of $e^{\pm }$ and $\gamma$ in Liquid Scintillator Detectors by A Universal Energy Response Model
• Neutron source-based event reconstruction algorithm in large liquid scintillator detectors