The JUNO Calibration Strategy and Simulation

Abstract

The Jiangmen Underground Neutrino Observatory (JUNO) is designed to primarily measure the neutrino Mass Ordering (MO) by detecting reactor anti-neutrinos via inverse beta decay. JUNO also has other rich physical potentials. Its Central Detector (CD), which is an acrylic sphere with a diameter of 35.4 m, filled by approximately 20 kton of liquid scintillator (LS), is equipped with large photomultipliers (18k for the CD + 2k for the Water Pool) and small photomultipliers (25,600) to measure the energy resolution of neutrinos with an unprecedented energy resolution of 3%/ E and an energy non-linearity better than 1%. Accordingly, a calibration complex, including Automatic Calibration Unit (ACU), Cable Loop System (CLS), Guide Tube Calibration System (GTCS) and Remotely Operated under-liquid-scintillator Vehicles (ROV), is designed to deliver multiple radioactive sources for the energy coverage of reactor neutrinos and CD full-volume. In this proceeding, the new design details and up-to-date progress about JUNO calibration system are presented.