Experimental cosmic ray studies by the sub-array of the Alborz-I array

Abstract

The first phase of the Alborz Observatory Array (Alborz-I) is designed to have 20 scintillation detectors to study the cosmic ray spectrum in the energy range of 10 12 eV to 10 16 eV. In order to collect data under stable environmental conditions, a sub-array consists of 5 plastic scintillation detectors on a pentagon with side of 5 m similar to the central cluster of the Alborz-I have been operationalized since February 2014. This paper studies angular distribution of detected showers and the angular resolution of the sub-array and compares it to the simulation result.