Speaker
Description
The Jiangmen Underground Neutrino Observatory, JUNO, is a massive neutirno experiment located in Kaiping, in south China. Currently under commissioning phase, it will exploit 20 kton of liquid scintillator, a mixture of LAB + 2.5 g/l PPO + 3 mg/l bis-MSB, whose detection process is based on the conversion of the energy deposited by interacting particles into light.
Thanks to its large dimension (about 35 m diameter) and its high energy resolution (3% at 1 MeV), JUNO will be a cutting-edge experiment in neutrino physics, with the main goal of determining the Neutrino Mass Ordering. However, to accomplish that, it is necessary to implement a simulation code for event and energy reconstruction, which requires to fully understand the optical properties of JUNO liquid scintillator (JUNO LS).
For this porpoise the Physics Department of Università degli Studi di Milano has set up the SHELDON (Separation of cHErenkov Light for Directionality Of Neutrino) facility, which consists of different units, each designed to analyze specific optical properties: emission time profile [1], absorption and emission spectra [1], refractive index and group velocity [2] .
In this poster I will present the optical characterization performed on the JUNO LS produced by the JUNO purification plants [3].
References:
[1] M.Beretta et al., Fluorescence emission of the JUNO liquid scintillator, Journal of Instrumentation 20 (2025) P05009 [arXiv:2501.09988].
[2] H.S. Zhang et al., Refractive index in the JUNO liquid scintillator, Nucl. Instrum. Meth. A 1068 (2024) 169730 [arXiv:2405.19879].
[3] C. Landini et al., Distillation and gas stripping purification plants for the JUNO liquid scintillator, Nucl. Instrum. Meth. A 1069 (2024) 169887 [arXiv:2406.01381].
| Neutrino Properties | . |
|---|---|
| Neutrino Telescopes & Multi-messenger | . |
| Neutrino Theory & Cosmology | . |
| Data Science and Detector R&D | . |
