Indisponibilité programmée / Scheduled outage
2-7 May 2010
Oustau Calendal Conference Center
Europe/Paris timezone
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Results of the prototype camera for FACT

4 May 2010, 11:00
Oustau Calendal Conference Center

Oustau Calendal Conference Center

Cassis, France
Oral presentation Cherenkov detectors in astroparticle physics Cherenkov detectors in astroparticle physics


Mr Thomas Krähenbühl (ETH Zurich)


The maximization of the photon detection efficiency (PDE) is a key issue in the development of cameras for Imaging Air Cherenkov Telescopes (IACT). Geiger-mode Avalanche Photodiodes (G-APD) are a promising candidate to replace the commonly used photomultiplier tubes by offering a larger PDE and a facilitated handling. The FACT project (First G-APD Cherenkov Telescope) evaluates the feasibility of this change by building a camera based on 1440 G-APDs for an existing small telescope. As a first step towards a full camera, a prototype camera module using 144 G-APDs was successfully built and tested. The experiences gained from its operation, including the observation of air showers, are presented. A method to compensate the strong signal variations due to the temperature dependence of the G-APDs gain is described.
Please indicate "poster" or "plenary" session. Final decision will be made by session coordinators. plenary

Primary author

Mr Thomas Krähenbühl (ETH Zurich)

Presentation Materials