Author/Authors :
Anderhub، نويسنده , , H. and Backes، نويسنده , , M. and Biland، نويسنده , , A. and Boller، نويسنده , , A. and Braun، نويسنده , , I. and Bretz، نويسنده , , T. and Commichau، نويسنده , , S. and Commichau، نويسنده , , V. and Domke، نويسنده , , M. and Dorner، نويسنده , , D. and Gendotti، نويسنده , , A. and Grimm، نويسنده , , O. and von Gunten، نويسنده , , H. F. Hildebrand، نويسنده , , D. and Horisberger، نويسنده , , U. and Kِhne، نويسنده , , J.-H، نويسنده ,
Abstract :
Geiger-mode Avalanche Photodiodes (G-APD) bear the potential to significantly improve the sensitivity of Imaging Air Cherenkov Telescopes (IACT). We are currently building the First G-APD Cherenkov Telescope (FACT) by refurbishing an old IACT with a mirror area of 9.5 square meters and are constructing a new, fine-pixelized camera using novel G-APDs. The main goal is to evaluate the performance of a complete system by observing very high energy gamma-rays from the Crab Nebula. This is an important field test to check the feasibility of G-APD-based cameras to replace at some time the PMT-based cameras of planned future IACTs like AGIS and CTA. In this article, we present the basic design of such a camera as well as some important details.
Keywords :
instrumentation , Geiger-mode avalanche photodiode (G-APD) , Ground-based gamma-ray astronomy , Cherenkov telescope
