München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 83: Gamma-Astronomie 2

T 83.4: Talk

Tuesday, March 10, 2009, 17:35–17:50, M218

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

The MAGIC 17m diameter Cherenkov telescopes system has been upgraded with a second telescope within the year 2007-2008 to allow stereo observations. This will improve the sensitivity and energy threshold of the current installation. The new MAGIC-II telescope has been 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) are used, with a quantum efficiency (QE) as high as 332*10⁴ to observe also under moderate moon conditions. In the second phase it is planned to replace the PMTs in the inner part of the camera with higher QE hybrid photo detectors (HPDs). Here we present test measurements and results perfromed on the PMT clusters.