MC study for TALE Hybrid detector

Abstract

The Telescope Array Low-energy Extension (TALE) Experiment is a hybrid air shower detector for observation of air showers induced by very high energy cosmic rays above 1016 eV. The TALE detector consists of a Fluorescence Detector (FD) station with ten FD telescopes and a surface detector (SD) array made up of 80 scintillation detectors. The TALE-FD and the TALE-SD array have been operational since 2013 and 2017 respectively. A triggering system of the TALE-SD using external triggering signals from the TALE-FD that is of a lower energy threshold, so called the hybrid trigger system, has been working since 2018. We evaluated the performance of hybrid mode of the TALE detector by using Monte Carlo simulation. Here we show analysis method for air shower events observed by the TALE hybrid detector and report the accuracies of air shower parameters.