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28 March 2024
 
  » arxiv » 0807.4421

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Third Level Trigger for the Fluorescence Telescopes of the Pierre Auger Observatory
A. Schmidt ; T. Asch ; H. Gemmeke ; M. Kleifges ; H.-J. Mathes ; A. Menchikov ; F. Schüssler ; D. Tcherniakhovski ;
Date 28 Jul 2008
AbstractThe trigger system for the Auger fluorescence telescopes is implemented in hard- and software for an efficient selection of fluorescence light tracks induced by high-energy extensive air showers. The algorithm of the third stage uses the multiplicity signal of the hardware for fast rejection of lightning events with above 99% efficiency. In a second step direct muon hits in the camera and random triggers are rejected by analyzing the space-time correlation of the pixels. The trigger algorithm was tested with measured and simulated showers and implemented in the electronics of the fluorescence telescopes. A comparison to a prototype trigger without multiplicity shows the superiority of this approach, e.g. the false rejection rate is a factor 10 lower.
Source arXiv, 0807.4421
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