Production via thermal slumping of large glass monolithic secondary mirrors (1.8 m diameter) for Schwarzschild-Couder air-Cherenkov gamma-ray telescopes
Date Issued
2024
Author(s)
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Torricelli, C.
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Torricelli, A.
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Valsecchi, G.
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Abstract
The standard design for 4-meter diameter class Imaging Atmospheric Cherenkov Telescopes (IACTs) used in groundbased gamma-ray astronomy is the dual-mirror Schwarzschild-Couder-like configuration. This design has been adopted for the telescopes in the ASTRI-Horn and ASTRI Mini-Array experiments (1 + 9 telescopes) and the construction of the 37 telescopes in the Small Size Telescope (SST) sub-array of the Cherenkov Telescope Array Observatory (CTAO) in Chile. The design provides an aplanatic optical response across a field of view wider than 10 degrees and is suitable for compact cameras using small pixels such as SiPM sensors. The telescopes feature secondary mirrors with a diameter of 1.8 meters, made of monolithic glass using a hot-slumping replication process. The paper discusses the manufacturing and characterization results of the prototype mirrors....
Coverage
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI
All editors
Navarro, Ramón; Jedamzik, Ralf
Series
Start page
126
Conferenece
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI
Conferenece place
Yokohama, Japan
Conferenece date
16-22 June, 2024
Issn Identifier
0277-786X
Rights
open.access
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