HARMONI at ELT: development of the high-contrast module

Laurent Jocou; Patrick Rabou; Thibaut Moulin; Yves Magnard; Adrien Hours; Fabrice Pancher; Sylvain Guieu; Alexis Carlotti; Alain Delboulbé; Maxime Vérove; Eric Stadler; Didier Maurel; Sylvain Rochat; François Henault; K. Dohlen; N. Thatte; B. Neichel; P. Vola; F. Clarke; D. Melotte; M. Tecza; H. Schnetler

doi:10.1117/12.2626984

29 August 2022 HARMONI at ELT: development of the high-contrast module

Laurent Jocou, Patrick Rabou, Thibaut Moulin, Yves Magnard, Adrien Hours, Fabrice Pancher, Sylvain Guieu, Alexis Carlotti, Alain Delboulbé, Maxime Vérove, Eric Stadler, Didier Maurel, Sylvain Rochat, François Henault, K. Dohlen, N. Thatte, B. Neichel, P. Vola, F. Clarke, D. Melotte, M. Tecza, H. Schnetler

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121854K (2022) https://doi.org/10.1117/12.2626984
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

HARMONI is the first light 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 (AO) modes – Single Conjugated AO (SCAO - including a High-Contrast capability) and Laser Tomography AO (LTAO) - or without AO (NOAO). The project is preparing for Final Design Reviews. In addition of the SCAO mode, the instrument includes a high-contrast imaging capability working in H and K band. This sub-system will be essential to spectrally characterize young giant exoplanets with contrast down to 1e-6 and a separation from 0.1 to 0.3 arc second (goal: 0.05-0.3’’) from their host star. It will also be used to characterize young circumstellar disks. The High-Contrast Module (HCM) is based on an apodized pupil coronagraph which lowers the intensity of the diffracted starlight to a planet-star contrast compatible with the dynamic range of the scientific detector. A dedicated Zernike wavefront sensor will internally calibrate non-common path aberrations at a 0.1Hz rate.

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Laurent Jocou, Patrick Rabou, Thibaut Moulin, Yves Magnard, Adrien Hours, Fabrice Pancher, Sylvain Guieu, Alexis Carlotti, Alain Delboulbé, Maxime Vérove, Eric Stadler, Didier Maurel, Sylvain Rochat, François Henault, K. Dohlen, N. Thatte, B. Neichel, P. Vola, F. Clarke, D. Melotte, M. Tecza, and H. Schnetler "HARMONI at ELT: development of the high-contrast module", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121854K (29 August 2022); https://doi.org/10.1117/12.2626984

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