Trigger and aperture of the surface detector array of the pierre auger observatory

By J. Abraham, P. Abreu, M. Aglietta, C. Aguirre, E. Ahn, D. Allard, I. Allekotte, J. Allen, J. Álvarez-Muñiz, M. Ambrosio and 462 more. 2010

203 citations recorded by the source corpus.

The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real events and the rejection of random coincidences. Such trigger makes the surface detector array fully efficient for the detection of EAS with energy above 3 x 10(18) eV, for all zenith angles between 0 degrees and 60 degrees, independently of the position of the impact point and of the mass of the primary particle. In these range of energies and angles, the exposure of the surface array can be determined purely on the basis of the geometrical acceptance. (C) 2009 Elsevier B.V. All rights reserved.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/33a50815b4738db2ee684622a9abeb67d6cb73f6

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Citations in the corpus

• The Pierre Auger Cosmic Ray Observatory (2015, methodology): “The 1475 high quality hybrid events recorded between Jan 2004 and Dec 2012 which have an energy above the SD full efficiency trigger threshold [36] are used in the calibration.”
• An Indication of Anisotropy in Arrival Directions of Ultra-high-energy Cosmic Rays through Comparison to the Flux Pattern of Extragalactic Gamma-Ray Sources (2018, background): “Above 20 EeV, both “vertical showers” (zenith angle 60q < ; Abraham et al. 2010) and “inclined showers” (60 80 q ; Aab et al. 2014b) trigger the array of detectors with 100% efficiency, the average angular resolution being below 1°and the statistical energy resolution being better than 12%.”