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SPACIROC: A Front-End Readout ASIC for JEM-EUSO cosmic ray observatory

Abstract : The SPACIROC ASIC is designed for the JEM-EUSO fluorescence imaging telescope onboard of the International Space Station. Its goal is the detection of Giant Air Shower above a few 10^19 eV, developing at a distance of about 400 km, downward in the troposphere. From such distance, most of the time, the number of the photons expected in the pixels is very weak, ranging from a few units to a few tens. For such running conditions, we propose a low- power, rad-hard ASIC which is intended for reading out a 64-channel Multi-Anode Photomultiplier. The two main features of this ASIC are the photon counting mode for each input and the charge-to-time (Q-to-T) conversions for the multiplexed channels. In the photon counting mode, the 100% triggering efficiency is achieved for 50fC input charges. For the Q-to-T converter, the ASIC requires a minimum input of 2pC. The working conditions of JEM- EUSO require the ASIC to have a low power dissipation which is around 1mW/channel. The design of SPACIROC and the test results are presented in this paper. SPACIROC is a result of the collaboration between OMEGAOrsay, France, RIKEN, ISAS/JAXA and Konan University, Japan on behalf of the JEM-EUSO consortium.
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Contributor : Sabine Starita <>
Submitted on : Thursday, June 16, 2011 - 4:41:01 PM
Last modification on : Wednesday, November 25, 2020 - 6:42:07 PM

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S. Ahmad, P. Barrillon, S. Blin-Bondil, S. Dagoret-Campagne, C. de la Taille, et al.. SPACIROC: A Front-End Readout ASIC for JEM-EUSO cosmic ray observatory. Technology and Instrumentation in Particle Physics 2011 (TIPP 2011), Jun 2011, Chicago, United States. pp.1600-1607, ⟨10.1016/j.phpro.2012.02.482⟩. ⟨in2p3-00601104⟩



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