4 years ago

Prototyping Hexagonal Light Concentrators Using High-Reflectance Specular Films for the Large-Sized Telescopes of the Cherenkov Telescope Array.

Akira Okumura, Hideaki Katagiri, Masahiro Teshima, Dang Viet Tan, Sakiya Ono, Tokonatsu Yamamoto, Syunya Tanaka, Tatsuo Yoshida, Koji Noda, Jim Hinton, Masaaki Hayashida

We have developed a prototype hexagonal light concentrator for the Large-Sized Telescopes of the Cherenkov Telescope Array. To maximize the photodetection efficiency of the focal-plane camera pixels for atmospheric Cherenkov photons and to lower the energy threshold, a specular film with a very high reflectance of 92-99% has been developed to cover the inner surfaces of the light concentrators. The prototype has a relative anode sensitivity (which can be roughly regarded as collection efficiency) of about 95 to 105% at the most important angles of incidence. The design, simulation, production procedure, and performance measurements of the light-concentrator prototype are reported.

Publisher URL: http://arxiv.org/abs/1711.02367

DOI: arXiv:1711.02367v1

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