The energy spectrum of the highest-energy particles in the Universe, ultra-high energy cosmic rays, has been measured with the Pierre Auger Observatory with an unprecedented precision. In addition to the well-known kink in the energy spectrum, typically referred to as the ankle, a new spectral break is found at somewhat higher energy. This new break in the energy spectrum can be explained by an energy-dependent mass composition of cosmic rays. The results are published in two related papers (Phys. Rev. Lett. 125, 121106 (2020) and Phys. Rev. D 102, 062005 (2020)).
Dr. Dušan Mandát from the Joint Laboratory of Optics visited in the past days together with his colleagues from FZU Dr. J. Vícha and Ing. A. Bakalová Arequipa in Peru, the candidate site for building of the future Southern Wide-field Gamma-ray Observatory (SWGO).
On October 19, 2021, an informal meeting of 
The timing detector AFP/ToF that has been from a large part designed, manufactured and operated by a team of physicists form the JLO, has been found to measure arrival times of high energy particles with resolution o