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Article Dans Une Revue Astropart.Phys. Année : 2016

Simulating the optical performance of a small-sized telescope with secondary optics for the Cherenkov Telescope Array

Cameron Rulten
  • Fonction : Auteur
Akira Okumura
  • Fonction : Auteur
Jürgen Schmoll
  • Fonction : Auteur

Résumé

• Detailed simulations of a small-sized telescope with secondary optics for the Cherenkov Telescope Array, and for the first time, an attempt to show a comprehensive tolerance analysis of a Schwarzschild–Couder Cherenkov telescope. • The radius of the encircled point spread function ( Θ 80 ) for the ideal optical system is found to be approximately 1.3 arcmin for an on-axis observation and approximately 3.6 arcmin for an off-axis observation at the edge of the field of view. • Shadowing is found to be at a similar level (∼11%) to that seen with the current generation of conventional Davies–Cotton Cherenkov telescopes. • An extensive tolerance analysis highlights the importance of maintaining the correct separation distance between the secondary mirror and the focal plane in order to contain the Θ 80 parameter within the size of a single pixel. • A small circular area (radius < 150 mm) at the center of the secondary mirror can be used for calibration and alignment instrumentation.

Dates et versions

hal-01582672 , version 1 (06-09-2017)

Identifiants

Citer

Cameron Rulten, Andreas Zech, Akira Okumura, Philippe Laporte, Jürgen Schmoll. Simulating the optical performance of a small-sized telescope with secondary optics for the Cherenkov Telescope Array. Astropart.Phys., 2016, 82, pp.36-48. ⟨10.1016/j.astropartphys.2016.05.002⟩. ⟨hal-01582672⟩
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