Study of UHECR Energy Reconstruction Method

Abstract

The Telescope Array (TA) Experiment has been performed at Utah desert in USA to observe Ultra-High Energy Cosmic Rays (UHECR) by using two type of detectors, three Fluorescence Telescopes (FD) and 512 plastic Scintillation Detector surface array (SD). In this report we describe the methodology of energy reconstruction with FD experimental data. There are monocular and stereo modes which utilize the events detected by one FD and two/three FDs, respectively. For extensive air shower profile reconstruction we use the geometric data of Shower Detection Plane (SDP) and fluorescence arrival timing to photo-multiplier, and perform UHECR energy reconstruction using the number of photo-electrons on SDP by Greisser-Hillas method.