Abstract
The Observatoire de Paris is constructing a prototype Small-Sized Telescope (SST) for the Cherenkov Telescope Array (CTA), named SST-GATE, based on the dual-mirror Schwarzschild-Couder optical design. Considering the mirrors size and its specific curvature and the optical requirements for the Cherenkov imaging telescope, a non-conventional process has been used for designing and manufacturing the mirrors of the SST-GATE prototype. Based on machining, polishing and coating of aluminium bulk samples, this process has been validated by simulation and tests that will be detailed in this paper after a discussion on the Schwarzschild-Couder optical design which so far has never been used to design ground based telescopes. Even if the SST-GATE is a prototype for small size telescopes of the CTA array, the primary mirror of the telescope is 4 meters diameter, and it has to be segmented. Due to the dual-mirror configuration, the alignment is a complex task that needs a well defined and precise process that will be discussed in this paper.
Original language | English (US) |
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Title of host publication | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation |
Editors | Colin R. Cunningham, Ramon Navarro, Allison A. Barto |
Publisher | SPIE |
ISBN (Electronic) | 9780819496195 |
DOIs | |
State | Published - 2014 |
Event | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation - Montreal, Canada Duration: Jun 23 2014 → Jun 27 2014 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 9151 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Other
Other | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation |
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Country/Territory | Canada |
City | Montreal |
Period | 6/23/14 → 6/27/14 |
Bibliographical note
Publisher Copyright:© 2014 SPIE.
Keywords
- CTA
- Cherenkov astronomy
- Dual-mirror design
- Gamma-ray astronomy
- Mirror manufacturing
- Schwarzschild-Couder
- Segmented mirrors
- Small Size Telescope