Speaker
Prof.
Charles Jui
(University of Utah)
Description
The Telescope Array (TA) experiment is the largest cosmic ray detector in
the northern hemisphere. It also operates the largest scintillation counter
array in the world. Together with the three fluorescence detectors (FDs),
it is optimized to study cosmic rays as independent detectors and in hybrid
mode at energies above the ankle structure. The TA low energy extension
will add two additional fluorescence detectors along with an infill array.
The first of these will operate in stereoscopic view with an existing TA FD
to study in detail the 0.3-30 EeV range around the ankle, with more than a
factor of five improvement in aperture at 1 EeV over HiRes. The Tower
fluorescence detector, using larger mirrors, will operate in hybrid mode
with the infill surface array to measure the spectrum, composition, and
anisotropy of cosmic rays down to 30 PeV, well below the "second
knee". Together, TA and TALE will be able to measure simultaneously all
three known spectral features in the ultra high energy (UHE) regime. TALE
will also study the transition from galactic to extragalactic cosmic ray
flux, with fluorescence Xmax capabilities for the first time.
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Primary author
Prof.
Charles Jui
(University of Utah)