MOSAIC on the ELT: optomechanical design of the NIR spectrograph

J. Floriot; L. Martin; T. Pamplona; Z. Challita; B. Delabre; K. Dohlen; K. El Hadi; E. Prieto; J. G. Cuby; M. Puech; L. A. M. Tasca

doi:10.1117/12.2628924

29 August 2022 MOSAIC on the ELT: optomechanical design of the NIR spectrograph

J. Floriot, L. Martin, T. Pamplona, Z. Challita, B. Delabre, K. Dohlen, K. El Hadi, E. Prieto, J. G. Cuby, M. Puech, L. A. M. Tasca

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121842Z (2022) https://doi.org/10.1117/12.2628924
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

MOSAIC is a multi-object spectrograph planned to be installed on the ESO-Extremely Large Telescope. The project is approved to start its phase B in September/October 2022. The main science cases addressed by MOSAIC go from the study of faint stars in the Milky Way and in the local group, to the study of dark matter, galaxy evolution and first-light objects at the epoch of reionisation. The MOSAIC instrument offers Multi-Object Spectroscopy and Integral Field Units capabilities from the visible (VIS) to the near-infrared (NIR). The Laboratoire d’Astrophysique de Marseille is responsible for the development of the near infrared spectrograph. More precisely, it is in charge of the global architecture and design of the NIR spectrograph (optical, mechanical, thermal) and the assembly, integration, tests and verification (AIT/V) activities in cryogenic environment. In this article, the main tradeoffs in terms of optical and mechanical architectures are analyzed; the main technical choices are justified according to the science requirements (from which technical requirement specifications are derived) and the level of maturity of key critical technologies. The NIR spectrograph will be described in terms of system engineering approach. The requirement flow-down strategy, from high-level requirements at the system level toward technical specifications at the module and component levels will be presented. The main interfaces and the development philosophy (with an emphasis on the AIT/V plan) will also be included.

Citation Download Citation

J. Floriot, L. Martin, T. Pamplona, Z. Challita, B. Delabre, K. Dohlen, K. El Hadi, E. Prieto, J. G. Cuby, M. Puech, and L. A. M. Tasca "MOSAIC on the ELT: optomechanical design of the NIR spectrograph", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121842Z (29 August 2022); https://doi.org/10.1117/12.2628924

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available