Modern status of the Tien-Shan cosmic ray station

V A Ryabov ,A P Chubenko ,S.P Bezshapov,O D Dalkarov ,Marina Vildanova ,S.b Shaulov ,R A Mukhamedshin ,L I Vildanova ,M.O Ptitsyn,V P Antonova ,A L Shepetov ,A N Karashtin ,N.N Zastrozhnova,V P Pavlyuchenko ,V V Piscal ,N.O Saduev,A.m Almenova ,A V Gurevich ,O.n Kryakynova ,Н М Салихов ,A.M Mukhashev,T Kh Sadykov ,V.V Zukhov,R.a Nam ,А С Борисов ,Yu V Shlyugaev ,N.F Nikolaevsky,A V Stepanov ,R.U Beisembayev,V S Puchkov ,W.m Thu ,G.G Mitko,K P Zybin

doi:10.1051/epjconf/201614512001

Abstract

We present a description of the new complex installation for the study of extensive air showers which was created at the Tien Shan mountain cosmic ray station, as well as the results of the first measurements made there in 2015–2016. We also present new results on high-energy radiation observed during a thunderstorm.

Highlights

The Tien Shan cosmic ray station is situated in the mountains of Northern Tien Shan (Kazakhstan), 43◦ North, 75◦ East at an altitude of 3340 m above sea level
The new complex for investigation of the various components of extensive air showers has been created at the Tien Shan station
High-resolution time series of neutron intensity, and the spectra of energy deposits in the hadron component were registered both on the surface of the Tien Shan station and underground by the neutron monitor like installations used for detecting neutron bearing cosmic ray particles

Summary

Introduction

The Tien Shan cosmic ray station is situated in the mountains of Northern Tien Shan (Kazakhstan), 43◦ North, 75◦ East at an altitude of 3340 m above sea level. High-precision measurements of the primary cosmic ray spectrum, mass composition, and distribution of the arrival directions in the range of E0 ∼ 1014 − 1017 eV using a wide-spread scintillation shower system, a hybird ionization-neutron calorimeter, muon detectors, Cherenkov radiation detectors;. Investigation of the parameters of high-energy nuclear interactions, especially shows in the region of EAS cores using a dense carpet of scintillation detectors with an enhanced up to (1 − 2) · 106 dynamic range of amplitude measurements, in combination with an ionization calorimeter, saturation-free neutron detectors, X-ray films, underground neutron and muon installations;. Simultaneous observations of gamma-ray, optical and radio emission, high-energy electrons, positrons, muons and neutrons at high altitudes became a new tool for studying the processes in the thunderstorm atmosphere [5,6,7,8]

EAS Installation

Thunderstorm installation

First EAS measurements

Observation of high-energy radiation during thunderstorms

Conclusions