PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
The complex EAS installation of the Tien Shan mountain cosmic ray station
B. Iskakov
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Pre-published on: March 16, 2020
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High altitude experimental installation Hadron-55 aimed for a complex investigation of the physics of E0=1014-1018eV extensive air showers so as of various effects connected with the passage of EAS particles through the environmental medium is located in the mountains of Northern Tien Shan at a height of 3340m above the sea level. At present time this installation includes a wide-spread scintillation detector system for registration of the charged EAS and determination EAS direction angles; a deep ionization-neutron calorimeter INCA for investigation high-energy muons; and a number of low-threshold detectors for registration of the soft gamma rays and evaporation of the hadron component, particularly within the central shower region; the detector of neutrons. For investigation of the radio-emission generated by shower particles a special ALMAREC array was installed which consists of a set of four 30-80MHz antennas placed uniformly around a 60m diameter circle and crosswise oriented in the N, S, E, and W directions. Another detector system based on a number of sensitive microphones placed in a 50m deep hole under the surface of the ground is used for the search of possible signal from elastic oscillations in acoustic frequency range which could be generated by the passage of energetic cosmic ray muons through a seismically stressed medium within the Earth's crust at a depth of a few kilometers. It was made a mutual calibration of all detector installations, and investigation results will be presented at this conference.
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