HARMONI at ELT: towards a final design for the Natural Guide Star Sensors system

K. Dohlen; P. Vola; Z. Challita; T. Morris; JF Sauvage; L. Jocou; A. Estrada; T. Louth; W. Bon; M. Dubbeldam; D. Montgomery; J-L Gimenez; T. Viera Cuberlo; Y. Charles; D. Le Mignant; A. Carlotti; J. Pequeiras; K. El Hadi; W. Humphreys; B. Neichel; T. Fusco; F. Clarke; D. Melotte; N. Thatte

doi:10.1117/12.2628938

25 August 2022 HARMONI at ELT: towards a final design for the Natural Guide Star Sensors system

K. Dohlen, P. Vola, Z. Challita, T. Morris, JF Sauvage, L. Jocou, A. Estrada, T. Louth, W. Bon, M. Dubbeldam, D. Montgomery, J-L Gimenez, T. Viera Cuberlo, Y. Charles, D. Le Mignant, A. Carlotti, J. Pequeiras, K. El Hadi, W. Humphreys, B. Neichel, T. Fusco, F. Clarke, D. Melotte, N. Thatte

Author Affiliations +

Proceedings Volume 12187, Modeling, Systems Engineering, and Project Management for Astronomy X; 121871D (2022) https://doi.org/10.1117/12.2628938
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 450nm to 2450nm with resolving powers from 3500 to 18000 and spatial sampling from 60mas to 4mas. It can operate in two Adaptive Optics modes - SCAO (including a High Contrast capability) and LTAO - or with NOAO. The project is preparing for final design review (FDR). The Natural Guide Star Sensors (NGSS) system of HARMONI provides wavefront and image stabilization sensing for each of the four observing modes of the instrument, LTAO, SCAO, HCAO, and NOAO. It consists of five subsystems, three of which provide wavefront sensing (LOWFS, SCAOS and HCM), the remaining two (ESE and ISB) providing thermal and mechanical functions. To limit thermal background and to ensure the required stability, the sensors operate in a cold, thermally stabilized, dry gas environment. This paper presents the overall design of the system with emphasis on system analysis, assembly and test, and maintenance.

Citation Download Citation

K. Dohlen, P. Vola, Z. Challita, T. Morris, JF Sauvage, L. Jocou, A. Estrada, T. Louth, W. Bon, M. Dubbeldam, D. Montgomery, J-L Gimenez, T. Viera Cuberlo, Y. Charles, D. Le Mignant, A. Carlotti, J. Pequeiras, K. El Hadi, W. Humphreys, B. Neichel, T. Fusco, F. Clarke, D. Melotte, and N. Thatte "HARMONI at ELT: towards a final design for the Natural Guide Star Sensors system", Proc. SPIE 12187, Modeling, Systems Engineering, and Project Management for Astronomy X, 121871D (25 August 2022); https://doi.org/10.1117/12.2628938

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