Speaker
Description
The Telescope Array (TA) experiment is a hybrid observatory designed to study ultra-high energy cosmic rays (UHECRs). As the largest UHECR observatory in the Northern Hemisphere, the TA experiment covers a 700 km$^2$ area on the ground in Millard County, Utah, USA. The TA surface detector (SD) consists of 507 plastic scintillation counters arranged on a square grid with 1.2 km spacing. Furthermore, the skies over the array are viewed by three fluorescence detector (FD) stations positioned around its periphery, which observe the development of cosmic ray showers in the atmosphere. Over the past 16 years, the TA experiment has maintained stable operation, ensuring data collection with high efficiency. This stability and high statistical precision have allowed us to observe three distinct spectral breaks in the TA SD energy spectrum: ankle, shoulder, and cutoff. In this presentation, we will report the latest TA SD energy spectrum and update our findings on the anisotropy of the energy spectrum.
