Speaker
Description
The Jiangmen Underground Neutrino Observatory (JUNO) central detector is an acrylic spherical vessel filled with 20 kton of liquid scintillator, with an inner diameter of 35.4 m. JUNO is designed to achieve an unprecedented energy resolution of about 3% at 1 MeV and an energy nonlinearity better than 1%, enabling a precise determination of the neutrino mass ordering, high-precision measurements of neutrino oscillation parameters, detailed studies of solar neutrinos, and enhanced sensitivity to supernova neutrinos. To meet these stringent performance requirements, JUNO has developed a comprehensive calibration system comprising the Automatic Calibration Unit (ACU), Cable Loop System (CLS), Guide Tube Calibration System (GTCS), and Remotely Operated Vehicle (ROV). By deploying multiple radioactive and laser sources at various positions both inside and outside the central detector, the system provides precise control of the energy scale, spatial response, and detector non-uniformity. This poster presents the hardware design and current performance of the JUNO calibration system.