The Origin of Ultra-High-Energy Cosmic Rays and the GRAND Project

The discovery of cosmic rays dates back over a century, yet their origins remain unresolved. Observations of ultra-high-energy cosmic rays and neutrinos are crucial for addressing this enduring mystery. Currently, utilizing low-frequency radio arrays to detect the shower processes of ultra-high-energy particles represents a cutting-edge research front.
This presentation will cover recent advances in the study of ultra-high-energy cosmic rays and neutrinos, future experimental facilities, and the fundamental principles and current development status of detecting high-energy particles with low-frequency radio arrays. This is exemplified by the GRAND project (Giant Radio Array for Neutrino Detection), a large-scale international collaborative experiment aimed at detecting ultra-high-energy neutrinos, cosmic rays using radio antennas.

Speaker: 
Yi Zhang (PMO)
Place: 
KIAA-auditorium
Host: 
Zhuo LI
Time: 
Thursday, December 12, 2024 - 3:30PM to Thursday, December 12, 2024 - 4:30PM
Biography: 
Yi is a professor at the Purple Mountain Observatory of the Chinese Academy of Sciences and the first recipient of the PMO's "Zhang Yuzhe Scholar" award. From 2015 to 2020, he served as the director of the Yangbajing International Cosmic Ray Observatory, a national field station under the Ministry of Science and Technology, and was one of the leaders of the Tibet ASγ experiment. He has been extensively involved in the physical analysis of cosmic ray experiments and the development of detectors. His work on cosmic ray anisotropy is regarded as a milestone in the cosmic ray community. In gamma-ray astronomy, he discovered a new ultra-high-energy gamma-ray radiation halo and measured the ultra-high-energy diffuse radiation of the Galactic plane with high precision. His research interests include cosmic ray physics, high-energy astrophysics, and high-energy particle detection. He is currently the project manager of the GP300 prototype array for the GRAND project.