The Construction and Application of Data System of LHAASO Project

The Large High Altitude Air Shower Observatory (LHAASO) is a major national science and technology infrastructure project. The project collects trillions of cosmic ray events every year, generating about 10 PB of data annually, providing valuable scientific data resources for physicists all over the world to explore the origin of high-energy cosmic rays, the related evolution of high-energy celestial bodies, and search for dark matter. In this paper, we firstly give a brief introduction to the LHAASO experiment including its detectors, and then explain the LHAASO data system in detail, including data acquisition system, data processing platform, data processing software, and scientific applications. Finally, we summarize the design and construction of LHAASO data system. It is expected that the experience could be useful to similar projects in future.