Design and Status of JUNO

TL;DR

JUNO is a large underground liquid scintillator detector designed to determine neutrino mass ordering with high precision, while also enabling detailed measurements of neutrino oscillation parameters and contributing to neutrino astronomy.

Contribution

This paper presents the design, construction status, and R&D efforts of JUNO, a novel large-scale detector with unprecedented energy resolution for neutrino physics.

Findings

JUNO aims for 3% energy resolution at 1 MeV.

It can measure neutrino oscillation parameters with 1% accuracy.

The detector will contribute to neutrino and multi-messenger astronomy.

Abstract

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton multi-purpose liquid scintillator detector currently being built in a dedicated underground laboratory in Jiangmen (PR China). JUNO' s main physics goal is to determine the neutrino mass ordering using electron anti-neutrinos from two nuclear power plants at a baseline of about 53 km. JUNO aims for an unprecedented energy resolution of 3% at 1 MeV for the central detector, with which the mass ordering can be measured with 3 - 4 $\sigma$ significance within six years of operation. Most neutrino oscillation parameters in the solar and atmospheric sectors can also be measured with an accuracy of 1% or better. Furthermore, being the largest liquid scintillator detector of its kind, JUNO will monitor the neutrino sky continuously for contributing to neutrino and multi-messenger astronomy. JUNO' s design as well as the status of its construction will be presented, together with a short excursion into its rich R&D program.