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Rhode","submitted_at":"2013-08-07T09:24:09Z","abstract_excerpt":"The First G-APD Cherenkov telescope (FACT) is the first telescope using silicon photon detectors (G-APD aka. SiPM). The use of Silicon devices promise a higher photon detection efficiency, more robustness and higher precision than photo-multiplier tubes. Since the properties of G-APDs depend on auxiliary parameters like temperature, a feedback system adapting the applied voltage accordingly is mandatory.\n  In this presentation, the feedback system, developed and in operation for FACT, is presented. 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