Abstract
The Extensive Air Shower (EAS) data collected by the Horizon-10T detector system has numerous events exhibiting the unusual spatial and temporal structure. These are events typically with two to four pulses of tens of ns wide that are present at distances above 300 m from the EAS axis, with these pulses being delayed by hundreds of ns. Each of such pulse groups were registered simultaneously by several detectors separated by up to a km from each other. The detectors brief overview and the analysis of simulated EAS by the CORSIKA software package are given in this article. The analysis indicates that such events with unusual structure cannot be formed by showers with EM and hadronic components only. This indicates a possibility for a new process observation beyond the standard model description in the energy range above ~1018 eV.
Highlights
The Horizon-10T (H10T) [1] is an upgrade from the previous Horizon-T (HT) [2] detector system that was constructed at the Tien Shan High-altitude Science Station (TSHSS)
The same pulse is used for the synchronization that is recorded by the 8th channel of each analog to digital converter (ADC)
The Horizon-10T detector system is designed for extended measurements for unusual events first reported by the Horizon-T detector
Summary
The Horizon-10T (H10T) [1] is an upgrade from the previous Horizon-T (HT) [2] detector system that was constructed at the Tien Shan High-altitude Science Station (TSHSS). N. Lebedev Physical Institute of the Russian Academy of Sciences and is located at a height of ∼3340 m above sea level near the city of Almaty, Kazakhstan. H10T is designed to study both the spatial and temporal distribution of the charged particles within the EAS with a time resolution of a few ns. It consists of ten charged particle detection points separated by distances up to 1.3 km.
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