Japan to nearly quadruple size of high-energy cosmic-ray detector
DOI: 10.1063/PT.5.028909
Science : The Telescope Array (TA), which is looking for evidence of high-energy cosmic rays, has 507 detectors spread across 700 km in Utah. Yoshiki Tsunesada of the Tokyo Institute of Technology has announced that Japan will be funding another 400 detectors, at a cost of $3.7 million, that will increase the size of the array to nearly 2500 km. TA and other similar arrays are looking for the cascade of particles created when extremely high-energy cosmic rays collide with particles in Earth’s atmosphere. Those cosmic rays have energies above 60 EeV, 10 million times higher than any particle accelerator can reach. Physicists hope the extended array will help them determine where the cosmic rays come from.
