Energy of Cosmic Rays
Mystery of Ultra-High Energy Cosmic Rays
Detection of Ultra-High Energy Cosmic Rays
One Possible Solution: Extensive Air Showers (EAS) Use the Earth?s atmosphere as part of our detector system!!!
The Fluorescence Technique
PPT Slide
1976: Prototype at Volcano Ranch
A New Experiment in Utah
1980-1993: The Fly?s Eye Experiment
An Amazing Discovery
Violation of the Greisen-Zatsepin-Kuzmin (GZK) Cut-off @ 6x1019 eV.
New International Collaboration: High Resolution Fly?s Eye (HiRes)
High Resolution Fly?s Eye (HiRes)
The Advantage of Superior Resolution
HiRes
Stereoscopic Observation with HiRes
Little Granite Mountain (HiRes-1)
HiRes-1
Preliminary Results from HiRes-1
Camel?s Back Ridge (HiRes-2)
HiRes Stereoscopic Events
A 25 Microsecond Movie (playback at 1/500,000 speed)
Many students receive hands-on scientific and engineering experience working with HiRes and its web-based educational outreach program, ASPIRE
The Future of UHE Cosmic Rays
Summary
Email: jui@cosmic.utah.edu