XII International Workshop on Ring Imaging Cherenkov Detectors - RICH2025

In 2021, LHAASO observed a large number of PeV cosmic ray candidates in the Milky Way. We proposed to build a telescope with at least 30 times the sensitive volume of the IceCube detector, so as to observe those LHAAASO sources. In order to realize this project, we innovatively put forward a photosensitive detector unit based on a photomultiplier tube with a maximum photosensitive area of 20 inches. We have already started the prototype work in Lake Baikal and South China Sea respectively. It is estimated that within three years, we will complete the R&D work of the project.