The '''Telescope Array project''' is an international collaboration involving research and educational institutions in Japan, Taiwan,The ChinaUnited States, Russia, South Korea, and the United StatesBelgium. The experiment is designed to observe air showers induced by [[ultra-high-energy cosmic ray]] air showers using a combination of ground array and air-fluorescence techniques. It is located in the high desert in [[Millard County, Utah|Millard County]], [[Utah]] (USA) at about {{convert|1400|m|ft|sp=us}} above sea level.
==Overview==
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==TALE==
TALE is the Telescope Array Low Energy extension. It is designed to observe cosmic rays with energies between 3×10<sup>16</sup>eV and 10<sup>19</sup>eV. TALE hasadds two10 fluorescencenew sites,telescopes oneto the Middle Drum observatory site (24 total telescopes) extending the vertical field of whichview isso locatedthat aboutit 5 kmnow awayextends from 3 to 59 degrees in elevation. This allows the Blackstation Rockto Mesasee FDthe site,shower anddevelopment anotherincluding whichshower maximum for lower energy events. This is aboutcritical 5 kmwhen awaytrying fromto determine the Longchemical Ridgecomposition FDof site.<refthe name="tawebsite">wwwincident cosmic ray particle.telescopearray.org/research.html</ref>
The TALE project also has ana graded infill array of scintillator groundstations spaced 400m and 600m apart. It then connects to the main Telescope Array scintillator array stationswhere spacedthe aboutscintillator 500mdetectors are 1200m apart. These stations measure charged particle densities (the shower footprint) at the Earth's surface for lower energy events approaching 3x10<sup>16</sup>eV▼
The TALE tower is a tower of fluorescence telescopes looking from near zenith to near horizon. These telescopes have 3m diameter mirrors to push the energy threshold of observable events as low as possible.
▲The TALE project also has an infill array of scintillator ground array stations spaced about 500m apart. These stations measure charged particle densities (the shower footprint) at the Earth's surface for lower energy events approaching 3x10<sup>16</sup>eV
