description Telescope Array Overview
The Telescope Array is a large hybrid experiment for detecting ultra-high-energy cosmic rays in the desert west of Delta, Utah. Its original surface detector array covers about 700 square kilometres, with detector stations spaced roughly 1.2 kilometres apart, and it is complemented by fluorescence telescopes that observe light from atmospheric air showers. Combining these systems allows researchers to estimate the energy, direction, and development of cosmic-ray events.
help Telescope Array FAQ
What does the Telescope Array detect?
The Telescope Array detects ultra-high-energy cosmic rays by measuring the extensive air showers they create in Earth's atmosphere. It operates in the desert west of Delta, Utah.
How large is the Telescope Array surface detector?
The surface array covers about 700 square kilometres, with roughly 500 detector stations arranged on a grid about 1.2 kilometres apart. Scientific papers commonly describe the deployed system as 507 plastic scintillator detectors.
How does the Telescope Array use hybrid detection?
Surface detectors sample particles reaching the ground, while fluorescence telescopes observe faint ultraviolet light from the air shower. The experiment combines both measurements to improve the reconstructed shower geometry and energy.
When did the Telescope Array become fully operational?
The detector became fully operational in March 2008. Its fluorescence system consists of 38 telescopes distributed among three stations around the Utah surface array.
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