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INGOT WFS for LGSs: First Results from Simulations

Date Issued
2020
Author(s)
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Abstract
The Ingot WFS, a Pyramid-like WFS, has been proposed as a relief to the LGS spot elongation. Actually, the artificial sources are confined in an excited cigar-shaped region in the sodium layer and portions of the telescope aperture have a corresponding different perspective. This diversity generates a variation of the WFS response depending on the illuminated sub-aperture position. The feasibility study of the INGOT WFS is developing within the MAORY project. In this work we present the numerical simulator built in order to investigate the performance of the IngotWFS in terms of Strehl Ratio, obtained reconstructing the incoming turbulent wavefront with a modal approach, in a closed-loop fashion. We also discuss the assumptions and tests we made in order to explore the range of parameters that play key roles in the game. Finally, we report on the overall results of the simulations of the performance expected by the Ingot WFS, under different conditions and input aberrations, with the aim to also compare the measured AO loop residuals with the Shack-Hartmann WFS ones, obtained working under the same assumptions.
Coverage
Adaptive Optics for Extremely Large Telescope 6 (AO4ELT6)
Conferenece
Adaptive Optics for Extremely Large Telescope 6 (AO4ELT6)
Conferenece place
Quebec
Conferenece date
9-14 June, 2019
Uri
Url
Ads BibCode
2020arXiv201209514P
Rights
open.access
File(s)
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2019Portaluri_AO4ELT6_IngotSim.pdf

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774.31 KB

Format

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