Ali Cosmic Microwave Background Polarisation Telescope (AliCPT)

completed

The Ali Cosmic Microwave Background Polarisation Telescope (AliCPT) is a cutting-edge telescope designed to detect ripples in spacetime from the dawn of the universe. Located at 5,250 metres in Tibet's remote Ali prefecture, it was completed after eight years of construction involving 16 institutions worldwide, including Stanford University. The telescope uses a 70cm lens to collect microwaves at 95 and 150 gigahertz and contains nearly 7,000 ultra-sensitive detectors cooled to near absolute zero. It aims to scan the entire northern sky and part of the southern sky to complement other observatories and help complete the global sky map in the search for primordial gravitational waves.