Design of light concentrators for Cherenkov telescope observatories

François Hénault; Pierre-Olivier Petrucci; Laurent Jocou; Bruno Khélifi; Pascal Manigot; Stéphane Hormigos; Jürgen Knödlseder; Jean-François Olive; Pierre Jean; Michael Punch

doi:10.1117/12.2024049

18 September 2013 Design of light concentrators for Cherenkov telescope observatories

François Hénault, Pierre-Olivier Petrucci, Laurent Jocou, Bruno Khélifi, Pascal Manigot, Stéphane Hormigos, Jürgen Knödlseder, Jean-François Olive, Pierre Jean, Michael Punch

Author Affiliations +

Proceedings Volume 8834, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X; 883405 (2013) https://doi.org/10.1117/12.2024049
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

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.

Citation Download Citation

François Hénault, Pierre-Olivier Petrucci, Laurent Jocou, Bruno Khélifi, Pascal Manigot, Stéphane Hormigos, Jürgen Knödlseder, Jean-François Olive, Pierre Jean, and Michael Punch "Design of light concentrators for Cherenkov telescope observatories", Proc. SPIE 8834, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X, 883405 (18 September 2013); https://doi.org/10.1117/12.2024049

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