Abstract
An Extensive Air Shower array of a novel type has been constructed in Tibet at an altitude of 4300 m above sea level. It consists of specially designed scintillator en-detectors capable of measuring two main EAS components: hadrons (n) and electrons (e). Results of the experiment are presented. It is demonstrated that the EAS integral distribution in the number of thermal neutrons can be well fitted by a single power law function. Comparison with detailed Monte-Carlo simulations using CORSIKA6.9 and GEANT4.10 codes are also shown.
Highlights
The hadronic component is the main one in Extensive Air Showers (EAS), but is still not studied well due to the absence of inexpensive detectors capable of covering a large area
The main feature of this method is a new electron-neutron detector capable to simultaneously measure two components of EAS: the electromagnetic component and thermal neutrons produced by the EAS hadronic component
The EAS size in thermal neutrons was never studied before, and we present here results obtained after about 3 years of the PRISMA-YBJ continuous operation
Summary
The hadronic component is the main one in Extensive Air Showers (EAS), but is still not studied well due to the absence of inexpensive detectors capable of covering a large area. The main feature of this method is a new electron-neutron detector (en-detector) capable to simultaneously measure two components of EAS: the electromagnetic component and thermal neutrons produced by the EAS hadronic component. This method allows us to make a large area array of a novel type (PRISMA project). The prototype of this array called PRISMA-YBJ is already running in Tibet (Yangbajing, 4300 m above sea level) since January 2013. The EAS size in thermal neutrons was never studied before, and we present here results obtained after about 3 years of the PRISMA-YBJ continuous operation
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