Status and Recent Results from the Telescope Array Ultra High Energy Cosmic Ray Experiment
ORAL
Abstract
The Telescope Array (TA) is the largest ultra-high-energy cosmic-ray (UHECR) observatory in the Northern Hemisphere. Together with its low energy extension (TALE) and high energy upgrade (TAx4), TA measures properties of cosmic rays from just below 1 PeV to more than 100 EeV. The lateral distributions of extensive air showers (EAS) initiated by the primary particles are sampled at Earth’s surface using scintillation detectors. There are more than 800 surface detectors (SDs) in four arrays at TA. The completion of TAx4 will see that number grow to over 1000. On clear moonless nights, longitudinal profiles of the showers are measured using 60 fluorescence detectors (FDs) located at three stations located on the periphery of the surface arrays. We present the status of the experiment and the recent results, which include new features in the energy spectrum at about and in UHECR arrival direction anisotropy.
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Presenters
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Charles Jui
University of Utah, Charles Jui
Authors
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Charles Jui
University of Utah, Charles Jui