HARMONI at ELT: SCAO performance analysis

Charlotte Z. Bond; Jean-François Sauvage; Romain Fetick; Noah Schwartz; Mojtaba Taheri; Cedric Héritier; Timothy Morris; Thierry Fusco; Benoît Neichel; Fraser Clarke; Niranjan Thatte

doi:10.1117/12.3019962

28 August 2024 HARMONI at ELT: SCAO performance analysis

Charlotte Z. Bond, Jean-François Sauvage, Romain Fetick, Noah Schwartz, Mojtaba Taheri, Cedric Héritier, Timothy Morris, Thierry Fusco, Benoît Neichel, Fraser Clarke, Niranjan Thatte

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130974U (2024) https://doi.org/10.1117/12.3019962
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. In this paper we present an analysis of the performance of HARMONI’s SCAO system, based on a pyramid wavefront sensor operating in the I band. The impact of the telescope environment is examined, including windshake, primary mirror aberrations, and the dynamics and control of the ELT correctors (M4/M5). Optimisation of the control basis based on knowledge of the stress response of M4 is presented and the performance of secondary loops are analysed, including a low order loop for NCPA correction. Finally, a full end-to-end simulation of the HARMONI SCAO system is presented and compared with original error budgets.

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Charlotte Z. Bond, Jean-François Sauvage, Romain Fetick, Noah Schwartz, Mojtaba Taheri, Cedric Héritier, Timothy Morris, Thierry Fusco, Benoît Neichel, Fraser Clarke, and Niranjan Thatte "HARMONI at ELT: SCAO performance analysis", Proc. SPIE 13097, Adaptive Optics Systems IX, 130974U (28 August 2024); https://doi.org/10.1117/12.3019962

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