Observing Muon Decays in Water Cherenkov Detectors at the Pierre Auger Observatory.

Allison, P. ; Arneodo, F. ; Bertou, X. ; Busca, N. ; Ghia, P. L. ; Medina, C. ; Navarra, G. ; Nellen, L. ; Ibarguen, H. S. ; Ranchon, S. ; Urban, M. ; Vilasensor, L.

Technical Information Center Oak Ridge Tennessee

关键词: Muon decays;    Muons;    Decay;    Waveforms;    Electrons;   

RP-ID  :  DE2006875570

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Muons decaying in the water volume of a Cherenkov detector of the Pierre Auger Observatory provide a useful calibration point at low energy. Using the digitized waveform continuously recorded by the electronics of each tank, we have devised a simple method to extract the charge spectrum of the Michel electrons, whose typical signal is about 1/8 of a crossing vertical muon. This procedure, moreover, allows continuous monitoring of the detector operation and of its water level. We have checked the procedure with high statistics on a test tank at the Observatory base and applied with success on the whole array.