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An N-band test bench for the METIS coronagraphic masks
Ronayette, Samuel; Mouzali, Salima; Barrière, Jean-Christophe et al.
2020In Evans, C; Bryant, J.; Motohara, K. (Eds.) Ground-based and Airborne Instrumentation for Astronomy VIII
 

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Copyright 2020 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11447/2562261/An-N-band-test-bench-for-the-METIS-coronagraphic-masks/10.1117/12.2562261.full


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Keywords :
Coronagraphy; Annular Groove Phase Mask; METIS; E-ELT; infrared; test bench; QCL lasers; N-band
Abstract :
[en] METIS is one of the first three instruments for the ELT, Europe's next-generation ground-based telescope. It will offer imaging, coronagraphy and spectroscopy in the L, M and N bands for general-purpose science in astrophysics. Among its main science drivers are circumstellar disks and extrasolar planets observations, which requires demanding high contrast imaging techniques. In that framework, METIS will be equipped with state-of-the-art phase mask coronagraphs: Apodizing Phase Plate (APP) and Annular Grooves Phase Mask (AGPM). Manufacturing the AGPM coronagraphs is a complex process that requires performance assessment with specific testing before implementation into the instrument. At Department of Astrophysics (CEA Saclay, France), responsible for the testing of the N-band AGPMs, a previously available test bench with a telescope simulator and cryogenic facility has been upgraded to comply with the AGPM tests requirements. This paper presents these requirements and describes the test bench design adopted. Then, based on preliminary results, we discuss the original solutions that permitted to reach our goals.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ronayette, Samuel;  CEA Saclay (France)
Mouzali, Salima;  CEA Saclay (France)
Barrière, Jean-Christophe;  CEA Saclay (France)
Pantin, Éric;  CEA Saclay (France)
Orduna, Thierry;  CEA Saclay (France)
Gallais, Pascal;  CEA Saclay (France)
Lortholary, Michel;  CEA Saclay (France)
Dumaye, Luc;  CEA Saclay (France)
Absil, Olivier  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab
Delacroix, Christian  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab
Ives, Derek;  European Southern Observatory (Germany)
Karlsson, Mikael;  Uppsala Univ. (Sweden))
Language :
English
Title :
An N-band test bench for the METIS coronagraphic masks
Publication date :
15 December 2020
Event name :
SPIE Astronomical Telescopes + Instrumentation 2020
Event organizer :
SPIE
Event date :
14 - 18 Dec 2020
Audience :
International
Main work title :
Ground-based and Airborne Instrumentation for Astronomy VIII
Editor :
Evans, C
Bryant, J.
Motohara, K.
Publisher :
SPIE
Collection name :
Proc SPIE 11447
Pages :
114472U
European Projects :
H2020 - 819155 - EPIC - Earth-like Planet Imaging with Cognitive computing
Name of the research project :
EPIC
Funders :
CE - Commission Européenne [BE]
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since 29 April 2021

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