Absolute Energy Scale of the HiRes Detector

Details Absolute Energy Scale of the HiRes Detector Absolute Energy Scale of the HiRes Detector

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....1..489m&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

We describe the calibration of the HiRes detector[1,2] and the determination of its absolute energy scale. The gains of each channel of the two HiRes detector sites are set and equalized locally using stable calibrated light sources which are transported from telescope to telescope. The gains are monitored on a daily basis with YAG lasers, one per site, with light pulses distributed to the telescopes through optical fibers. Three steerable laser systems, located respectively at HiRes-1, HiRes-2, and in the field, fire shots which are observed by the detector from nearby to over 40 km away. On days with molecular atmosphere these allow us to verify the photometric scale of the detector.

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