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Proceedings Paper

Design of light concentrators for Cherenkov telescope observatories
Author(s): François Hénault; Pierre-Olivier Petrucci; Laurent Jocou; Bruno Khélifi; Pascal Manigot; Stéphane Hormigos; Jürgen Knödlseder; Jean-François Olive; Pierre Jean; Michael Punch
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Paper Abstract

The Cherenkov Telescope Array (CTA) will be the largest cosmic gamma ray detector ever built in the world. It will be installed at two different sites in the North and South hemispheres and should be operational for about 30 years. In order to cover the desired energy range, the CTA is composed of typically 50-100 collecting telescopes of various sizes (from 6 to 24-m diameters). Most of them are equipped with a focal plane camera consisting of 1500 to 2000 Photomultipliers (PM) equipped with light concentrating optics, whose double function is to maximize the amount of Cherenkov light detected by the photo-sensors, and to block any stray light originating from the terrestrial environment. Two different optical solutions have been designed, respectively based on a Compound Parabolic Concentrator (CPC), and on a purely dioptric concentrating lens. In this communication are described the technical specifications, optical designs and performance of the different solutions envisioned for all these light concentrators. The current status of their prototyping activities is also given.

Paper Details

Date Published: 18 September 2013
PDF: 12 pages
Proc. SPIE 8834, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X, 883405 (18 September 2013); doi: 10.1117/12.2024049
Show Author Affiliations
François Hénault, Institut de Planétologie et d’Astrophysique de Grenoble, Univ. Joseph Fourier, CNRS (France)
Pierre-Olivier Petrucci, Institut de Planétologie et d’Astrophysique de Grenoble, Univ. Joseph Fourier, CNRS (France)
Laurent Jocou, Institut de Planétologie et d’Astrophysique de Grenoble, Univ. Joseph Fourier, CNRS (France)
Bruno Khélifi, Ecole Polytechnique (France)
Pascal Manigot, Ecole Polytechnique (France)
Stéphane Hormigos, Ecole Polytechnique (France)
Jürgen Knödlseder, Institut de Recherche en Astrophysique et Planétologie (France)
Jean-François Olive, Institut de Recherche en Astrophysique et Planétologie (France)
Pierre Jean, Institut de Recherche en Astrophysique et Planétologie (France)
Michael Punch, Univ. Paris 7-Denis Diderot (France)


Published in SPIE Proceedings Vol. 8834:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X
Roland Winston; Jeffrey Gordon, Editor(s)

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