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Welcome to the HiRes Fly's Eye Experiment
Experiment Overview
The High Resolution Fly's Eye experiment is located in at the Dugway
Proving Grounds, Dugway Utah. The experiment is designed to
study cosmic rays at the highest energies possible, >= 10**20 eV.
The cosmic rays are studied by observing the resulting extensive air
showers from the interaction of cosmic rays with the atmosphere. The
air showers are observed using nitrogen fluorescence light given off
by nitrogen molecules excited by the passage of relativistic electrons
in the shower. A large array of mirrors focuses the flouresence light
on to an array of photomultiplier tubes with each photomultiplier tube
having an effective aperture of 1 degree by 1 degree. The signals from
the photomultiplier tubes for candidate events are digitized and recorded
for subsequent analysis. This work is supported in part by the
National Science Foundation
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