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Characterization and performance of the ASIC (CITIROC) front-end of the ASTRI camera

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arxiv 1506.00264 v1 pith:VN3CPK3G submitted 2015-05-31 physics.ins-det

D. Impiombato , S. Giarrusso , T. Mineo , O. Catalano , C. Gargano , G. La Rosa , F. Russo , G. Sottile
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S. Billotta G. Bonanno S. Garozzo A. Grillo D. Marano G. Romeo
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classification physics.ins-det
keywords astricitiroccamerapulsesst-2mamplitudecherenkovchip
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The Cherenkov Imaging Telescope Integrated Read Out Chip, CITIROC, is a chip adopted as the front-end of the camera at the focal plane of the imaging Cherenkov ASTRI dual-mirror small size telescope (ASTRI SST-2M) prototype. This paper presents the results of the measurements performed to characterize CITIROC tailored for the ASTRI SST-2M focal plane requirements. In particular, we investigated the trigger linearity and efficiency, as a function of the pulse amplitude. Moreover, we tested its response by performing a set of measurements using a silicon photomultiplier (SiPM) in dark conditions and under light pulse illumination. The CITIROC output signal is found to vary linearly as a function of the input pulse amplitude. Our results show that it is suitable for the ASTRI SST-2M camera.

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