A new solution for mirror coating in $\gamma$-ray Cherenkov Astronomy

Abstract

In the $\gamma$-ray Cherenkov Astronomy framework mirror coating plays a crucial role in defining the light response of the telescope. We carried out a study for new mirror coating solutions with both a numerical simulation software and a vacuum chamber for small sample production. In this article, we present a new mirror coating solution consisting of a 28-layer interferometric SiO${}_2$-TiO${}_2$-HfO${}_2$ design deposited on a glass substrate, whose average reflectance is above $90\%$ for normally incident light in the wavelength range between 300 and 550 nm.

6 pages, 5 figures. Article submitted to Experimental Astronomy, the final publication is available at link.springer.com

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