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The ionization calorimeter “Adron-55”, located at an altitude of 3340 meters above sea level, is partof the unified registration system for the shower installation of the Tian-Shan high-mountain station. The“Hadron-55” installation is a 2-tier ionization calorimeter consisting of a shower system, a gamma blockand a hadron block located under it with a vertical air gap of 2.2 meters. The calorimeter consists of 6layers of ionization chambers with 144 chambers in each layer and a spatial resolution of the WASstructure equal to 11 cm. The total area of the calorimeter is 55 square meters with an absorber thicknessof 1150 g / cm2. The calorimeter also contains helium counters for recording the neutron component. Thecentral shower calorimeter system contains 30 scintillation detectors with an area of 400 m2 and 8peripheral Sc-detectors at a distance of up to 100 m. The total area of the entire recording system is ~30000 m2. Over 4 years of operation, more than 120,000 events with energies above 1015 eV have beenrecorded. Currently, the processing and analysis of the data being obtained are performed.

Search for structures in the distribution of particles from the central area of wide atmospheric showers conducted on the Adron-55 installation