The highest energy cosmic rays remain elusive and mysterious, and their study requires extraordinary efforts.
Scientific Highlights
Maxwell’s unified description of electric and magnetic phenomena is one of the greatest achievements of 19th century physics.
Cosmic rays are energetic particles, mostly atomic nuclei, raining down upon the Earth from the depths of the cosmos.
As part of the AugerPrime upgrade, scintillator detectors (SSD) have been added to the existing water-Cherenkov surface detector stations.
The Pierre Auger Collaboration measured a dipolar anisotropy in the arrival-direction distribution of the cosmic rays with energies in excess of 8x1018 eV, finding that the flux is about
6.5% larger than the average in one direction of the sky and it is correspondingly smaller in the opposite direction.
One of the biggest challenges in cosmic-ray physics is to accurately pin down the absolute energy of a measured cosmic ray.
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