Aspherical mirrors for the Gamma-ray Cherenkov Telescope, a Schwarschild-Couder prototype proposed for the future Cherenkov Telescope Array

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33162115" target="_blank" >RIV/61989592:15310/16:33162115 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/16:00551671

Result on the web

<a href="http://dx.doi.org/10.1117/12.2232091" target="_blank" >http://dx.doi.org/10.1117/12.2232091</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2232091" target="_blank" >10.1117/12.2232091</a>

Result language

angličtina

Original language name

Aspherical mirrors for the Gamma-ray Cherenkov Telescope, a Schwarschild-Couder prototype proposed for the future Cherenkov Telescope Array

Original language description

The Cherenkov Telescope Array (CTA) project, led by an international collaboration of institutes, aims to create the world's largest next generation Very High-Energy (VHE) gamma-ray telescope array, devoted to observations in a wide band of energy, from a few tens of GeV to more than 100 TeV. The Small-Sized Telescopes (SSTs) are dedicated to the highest energy range. Seventy SSTs are planned in the baseline array design with a required lifetime of about 30 years. The GCT (Gamma-ray Cherenkov Telescope) is one of the prototypes proposed for CTA's SST sub-array. It is based on a Schwarzschild-Couder dual-mirror optical design. This configuration has the benefit of increasing the field-of-view and decreasing the masses of the telescope and of the camera. But, in spite of these many advantages, it was never implemented before in ground-based Cherenkov astronomy because of the aspherical and highly curved shape required for the mirrors. The optical design of the GCT consists of a primary 4 meter diameter mirror, segmented in six aspherical petals, a secondary monolithic 2-meter mirror and a light camera. The reduced number of segments simplifies the alignment of the telescope but complicates the shape of the petals. This, combined with the strong curvature of the secondary mirror, strongly constrains the manufacturing process. The Observatoire de Paris implemented metallic lightweight mirrors for the primary and the secondary mirrors of GCT. This choice was made possible because of the relaxed requirements of optical Cherenkov telescopes compared to optical ones. Measurements on produced mirrors show that these ones can fulfill requirements in shape, PSF and reflectivity, with a clear competition between manufacturing cost and final performance.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

—

Project

<a href="/en/project/LM2015046" target="_blank" >LM2015046: Cherenkov Telescope Array – participation of the Czech Republic</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

ISBN

978-1-5106-0203-8

ISSN

0277-786X

e-ISSN

—

Number of pages

12

Pages from-to

"991240-1"-"991240-12"

Publisher name

SPIE

Place of publication

Bellingham (OR)

Event location

Edinburgh

Event date

Jun 26, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000387747900121