The Large High Altitude Air Shower Observatory (LHAASO), one of China's key national science and technology infrastructure facilities, has accurately measured the brightness over 3.5 orders of magnitude of the standard candle in high-energy astronomy, thus calibrating a new standard for UHE gamma-ray sources. The standard candle is the famous Crab Nebula, which evolved from the "guest star" rec...

China's Large High Altitude Air Shower Observatory (LHAASO)—one of the country's key national science and technology infrastructure facilities—has found a dozen ultra-high-energy (UHE) cosmic accelerators within the Milky Way. It has also detected photons with energies exceeding 1 peta-electron-volt (quadrillion electron-volts or PeV), including one at 1.4 PeV. The latter is the highest energ...

China's Large High Altitude Air Shower Observatory (LHAASO), a cosmic ray detection facility located in the high mountains of Sichuan province, recently began scientific observation of very high energy cosmic rays as it launched operation of its first set of detectors. The goal of LHAASO, which will be completed in 2021, is to discover high energy gamma ray sources, and precisely measure the ra...

The No.1 Pool for the Water Cherenkov Detector Array (WCDA) of the LHAASO project began to be injected with purified water on February 28, 2019.

The 2018 annual engineering construction conference of LHAASO was held at the Institute of Frontier and Interdisciplinary Science of Shandong University, January 3 to 4.

The No.1 Power Distribution Room, the core of the power supply at LHAASO project was successfully powered up on December 10, 2018. The No.1 Power Distribution Room was located at the No.1 Power Load Center of LHAASO. It provided power supply to the Water Cherenkov Detectors, the individual experimental buildings around the pool and more than 6000 detectors of the KM2A array.

The meeting for assessment and verification of electromagnetic particle detectors for LHAASO project was held at the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences (CAS) on Dec. 2018. The assessment team was composed of experts from Tsinghua University, the University of Science and Technology of China, and IHEP. Prof. Liu Yinong from Tsinghua University served as th...

The installation team for LHASSO's muon detectors successfully completed the director technology exploration and the installation mission for 2018 on November 10.

On October 22, 2018, technicians installed the first photomultiplier tube for the No.1 Pool of LHASSO's Water Cherenkov Detector Array (WCDA) to the predetermined position, which signified the launch of full installation of WCDA.

The centralized installation of the engineering and technological facilities kicked off on June 19, 201