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An image-based array trigger for imaging atmospheric Cherenkov telescope arrays
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SYSNO ASEP 0538358 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An image-based array trigger for imaging atmospheric Cherenkov telescope arrays Author(s) Dickinson, H. (US) Number of authors 7 Source Title Nuclear Instruments & Methods in Physics Research Section A. - : Elsevier - ISSN 0168-9002
Roč. 891, May (2018), s. 6-17Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords gamma-ray astronomy ; array trigger ; gamma-hadron separation Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics Research Infrastructure CTA-CZ - 90046 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Limited access UT WOS 000428344600002 EID SCOPUS 85042733025 DOI 10.1016/j.nima.2018.02.048 Annotation It is anticipated that forthcoming, next generation, atmospheric Cherenkov telescope arrays will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will sample a wide (8 degrees) field of view using a densely pixelated camera comprising over 10(4) individual readout channels. A readout frequency congruent with the expected single-telescope trigger rates would result in substantial data rates. To ameliorate these data rates, a novel, hardware-level Distributed Intelligent Array Trigger (DIAT) is envisioned. A copy of the DIAT operates autonomously at each telescope and uses reduced resolution imaging data from a limited subset of nearby telescopes to veto events prior to camera readout and any subsequent network transmission of camera data that is required for centralized storage or aggregation. We present the results of Monte-Carlo simulations that evaluate the efficacy of a 'Parallax width' discriminator that can be used by the DIAT to efficiently distinguish between genuine gamma-ray initiated events and unwanted background events that are initiated by hadronic cosmic rays. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address https://doi.org/10.1016/j.nima.2018.02.048
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