Researchers from Sun Yat-sen University (SYSU) and the Institute of High Energy Physics (IHEP) have developed a novel top veto tracker system for the Taishan Antineutrino Observatory (TAO) experiment.

This system features a top veto tracker system with remarkable characteristics such as high light yield, distinct signal-background differentiation and high detection efficiency even at high thresholds, and provides the TAO experiment with a robust capability to suppress cosmic muon induced fast neutron and radioisotope events, which are significant correlated backgrounds for the neutrino signal. This scalable solution establishes a transferable technique for next-generation neutrino detectors requiring muon identification efficiency 99.5% across multi-ton volumes.

The findings are published in the journal Nuclear Science and Techniques.