HARMONI at ELT: Towards a final design for the natural guide star sensors system - Archive ouverte HAL
Communication Dans Un Congrès Année : 2022

HARMONI at ELT: Towards a final design for the natural guide star sensors system

Tim Morris
  • Fonction : Auteur
Alberto Estrada Piqueras
  • Fonction : Auteur
Thomas Louth
  • Fonction : Auteur
Marc Dubbeldam
  • Fonction : Auteur
David Montgomery
  • Fonction : Auteur
Teodora Viera Cuberlo
  • Fonction : Auteur
Javier Piqueras López
  • Fonction : Auteur
William Humphreys
  • Fonction : Auteur
Fraser Clarke
  • Fonction : Auteur
David Melotte
  • Fonction : Auteur
Niranjan Thatte
  • Fonction : Auteur

Résumé

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 stabilisation 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.
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Dates et versions

hal-03795796 , version 1 (04-10-2022)

Identifiants

Citer

Kjetil Dohlen, Pascal Vola, Zalpha Challita, Tim Morris, Jean-Francois Sauvage, et al.. HARMONI at ELT: Towards a final design for the natural guide star sensors system. Proceedings SPIE Modeling, Systems Engineering, and Project Management for Astronomy X, Jul 2022, Montréal, Canada. pp.50, ⟨10.1117/12.2628938⟩. ⟨hal-03795796⟩
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