Detection of Cherenkov light from air showers with Geiger-APDs

Details Detection of Cherenkov light from air showers with Geiger-APDs Detection of Cherenkov light from air showers with Geiger-APDs

2007-12-10

arxiv.org/abs/0712.1592v1

Nucl.Instrum.Meth.A610:415-418,2009

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, to appear in the proceedings of the 30th International Cosmic Ray Conference, Merida, July 2007

Scientific paper

10.1016/j.nima.2009.05.083

We have detected Cherenkov light from air showers with Geiger-mode APDs (G-APDs). G-APDs are novel semiconductor photon-detectors, which offer several advantages compared to conventional photomultiplier tubes in the field of ground-based gamma-ray astronomy. In a field test with the MAGIC telescope we have tested the efficiency of a G-APD / light catcher setup to detect Cherenkov light from air showers. We estimate a detection efficiency, which is 60% higher than the efficiency of a MAGIC camera pixel. Ambient temperature dark count rates of the tested G-APDs are below the rates of the night sky light background. According to these recent tests G-APDs promise a major progress in ground-based gamma-ray astronomy.

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