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T: Fachverband Teilchenphysik

T 73: Gammaastronomie II

T 73.6: Talk

Tuesday, March 4, 2008, 18:05–18:20, KGII-HS 2006

Performance tests of the MAGIC-II Camera — •Daniela Borla Tridon for the MAGIC collaboration — Max Planck Institut, Munich

The MAGIC 17m diameter Cherenkov telescope will be upgraded with a second telescope within the year 2007 to allow stereo observation. This will improve the sensitivity and energy threshold of the current installation. The new MAGIC-II telescope will be equipped with a camera composed of 1039 pixles with 0.1-degree diameter. Seven pixels in a hexagonal configuration are grouped to form one cluster of the camera. This modular design allows easier maintenance and replacement of photosensors. In the first phase Hamamatsu photomultipliers (PMTs) with a high quantum efficiency (QE) with a peak of around 34%. The PMTs will be operated at a rather low gain of 20000 to operate also under moderate moon conditions. In the second phase it is planned to replace the inner PMTs with higher QE hybrid photo detectors (HPDs). Here I present results of the quality and performance tests of the PMT clusters.