Performance of the Gamma-ray Cherenkov Telescope structure: a dual-mirror telescope prototype proposed for the future Cherenkov Telescope Array

Dournaux, Jean-Laurent; Amans, Jean-Philippe; Dangeon, L.; Fasola, G.; Gironnet, J.; Huet, Jérôme; Laporte, Philippe; Abchiche, A.; Barkaoui, S.; Bousquet, J.-J.; Buchholtz, G.; Dumas, D. J.P.; Gaudemard, Julien; Jegouzo, I.; Poinsignon, Patrick; Vergne, L.; Sol, H.

doi:10.1117/12.2232099

Cited by 4 publications

(9 citation statements)

References 2 publications

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“…The global geometry of the prototype mechanical structure equipped with metallic mirrors is found to be entirely compliant to the theoretical design, as shown by the experimental focal plan position, which is found within 1 mm of its theoretical value, and the on-axis plate scale of 39.57 mm/°, similar to the theoretical value of 39.6 mm/°. The stability of the structure and its experimental modal analysis (measured eigenmodes on the prototype) satisfies the normal modes specification and the optical displacement requirements [6,7,11]. The security systems and more especially the emergency stops have been tested several times during the different campaigns and the compliance tests, proving that the structure (and its pointing performance) suffer no damage.…”

Section: Mechanical and Control-command Performancementioning

confidence: 64%

Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array

Dmytriev¹,

Dangeon²,

Fasola³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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Section: Mechanical and Control-command Performancementioning

confidence: 64%

Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array

Dmytriev¹,

Dangeon²,

Fasola³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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“…The verification of the design performances with respect to CTA requirements is ongoing. The mechanical structure has been fully validated [5,6] . The remaining work consists of consolidating the optical characterisation of the pGCT and software testing.…”

Section: Counterweightmentioning

confidence: 99%

Final characterisation and design of the Gamma-ray Cherenkov Telescope (GCT) for the Cherenkov telescope array

Blanc

Fasola

Huet

et al. 2018

Ground-Based and Airborne Telescopes VII

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The Gamma-ray Cherenkov Telescope (GCT) is one of the telescopes proposed for the Small Sized Telescope (SST) section of CTA. Based on a dual-mirror Schwarzschild-Couder design, which allows for more compact telescopes and cameras than the usual single-mirror designs, it will be equipped with a Compact High-Energy Camera (CHEC) based on silicon photomultipliers (SiPM). In 2015, the GCT prototype was the first dual-mirror telescope constructed in the prospect of CTA to record Cherenkov light on the night sky. Further tests and observations have been performed since then. This report describes the current status of the GCT, the results of tests performed to demonstrate its compliance with CTA requirements, and the optimisation of the design for mass production. The GCT collaboration, including teams from Australia, France, Germany, Japan, the Netherlands and the United Kingdom, plans to install the first telescopes on site in Chile for 2019-2020 as part of the CTA pre-production phase.

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“…In the following, the GCT prototype telescope performance as well as the latest campaign of observation in Meudon are briefly described. A further section focuses on the developments made in terms of design validation or integration during this last year from the project status reported in Dournaux et al [5].…”

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confidence: 99%

“…The final design of the telescope has a total mass of about 8 tons. The Telescope Control System's (TCS) main purpose is to drive the telescope's axes for tracking and pointing [5,9]. To achieve this, three embedded cabinets connected to a power supply and network (Internet and fieldbus) are implemented on the telescope.…”

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Towards f inal characteris ation and performance of the GCT prototype telescope structure for the Cherenkov Telescope Array

Blanc¹,

Dangeon²,

Hocdé³

et al. 2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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The Gamma-ray Cherenkov Telescope (GCT) is an innovative dual-mirror solution proposed for the Small-Size-Telescopes of the future Cherenkov Telescope Array (CTA), capable of imaging the showers induced by cosmic gamma-rays with energies from a few TeV up to 300 TeV. The Schwarzschild-Couder design on which the telescope optical design is based makes possible the construction of a fast telescope (primary mirror diameter 4 m, focal length 2.3 m) with a plate scale well matched to compact photosensors, such as multi-anode or silicon photomultipliers (MAPMs and SiPMs, respectively) for the camera. The prototype GCT on Meudon's site of the Observatoire de Paris saw first Cherenkov light from air showers in November 2015, using an MAPM-based camera. In this contribution, we firstly report on the prototype GCT telescope's performance during its assessment phase. Secondly, we present the telescope configuration during a campaign of observations held in spring 2017. Finally, we describe studies of the telescope structure, such as the pointing and tracking performance.

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Performance of the Gamma-ray Cherenkov Telescope structure: a dual-mirror telescope prototype proposed for the future Cherenkov Telescope Array

Cited by 4 publications

References 2 publications

Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array

Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array

Final characterisation and design of the Gamma-ray Cherenkov Telescope (GCT) for the Cherenkov telescope array

Towards f inal characteris ation and performance of the GCT prototype telescope structure for the Cherenkov Telescope Array

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