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The prototype high-resolution Fly's Eye cosmic ray detector |
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| Authors: | T Abu-Zayyad M Al-Seady K Belov D J Bird J Boyer G Chen R W Clay H Y Dai B R Dawson Y Ho M A Huang C C H Jui M J Kidd D B Kieda B C Knapp W Lee E C Loh E J Mannel J N Matthews T A O'Halloran A Salman K M Simpson J D Smith P Sokolsky P Sommers S B Thomas L R Wiencke C R Wilkinson N R Wild |
| Affiliation: | a Department of Physics and the High Energy Astrophysics Institute, University of Utah, UT 84112, USA b Department of Physics and Mathematical Physics, The University of Adelaide, SA 5005, Australia c Columbia University, Nevis Laboratories, Irvington, NY 10533, USA d Department of Physics, University of Illinois at Urbana-Champaign, IL 61801, USA |
| Abstract: | The High-Resolution Fly's Eye (HiRes) is an observatory for the highest energy cosmic rays. It detects the nitrogen fluorescence light induced by the passage of giant cosmic ray extensive air showers through the atmosphere. A two-site prototype of the observatory was operated from September 1994 to November 1996. In this paper we describe the components of that detector, and the procedures used to calibrate the detector and characterise the atmosphere. Data collected by the HiRes prototype are being used for physics studies, including an analysis of the cosmic ray mass composition in the energy range from 1017 to 1018 eV. |
| Keywords: | Cosmic ray detectors Air fluorescence detection |
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