Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-22
Proceedings of the 28th International Cosmic Ray Conferences, Tsukuba, Japan, (2003) 473-476
Astronomy and Astrophysics
Astrophysics
Submitted to 28th International Cosmic Ray Conferences (ICRC 2003), Tsukuba, Japan, 31 Jul - 7 Aug 2003
Scientific paper
The detectors of the surface array of the Pierre Auger Observatory are water Cherenkov tanks. The signals from each tank are read out using three photomultipliers. The energy of the primary particle is inferred from signal densities and requires good linearity of the PMTs and a large dynamic range. The absolute time of arrival of the shower front at each tank is obtained from the Global Positioning System (GPS) with a resolution of about 10 ns, ensuring an accurate primary angular reconstruction. Additionally, it is intended to use the rise time and shape of the signals to constrain the nature of the primary particle: this sets further requirements on the signal processing. In this paper, the main features of the signal processing associated with the surface detector will be presented and its performance will be discussed in the context of the extraction of shower parameters.
for the Pierre Auger Collaboration
Suomijärvi T.
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