Synthetic WFS model for LINC-NIRVANA interaction matrices

Carmelo Arcidiacono; Maria Bergomi; Jacopo Farinato; Luca Marafatto; Kalyan Kumar Radhakrishnan Santakumari; Roberto Ragazzoni; Valentina Viotto; Tom M. Herbst; Micah Klettke; Florian Briegel; Thomas Bertram; Peter Bizenberger; Richard J. Mathar; Fabio Santos; Moritz Plenz

doi:10.1117/12.2562513

13 December 2020 Synthetic WFS model for LINC-NIRVANA interaction matrices

Carmelo Arcidiacono, Maria Bergomi, Jacopo Farinato, Luca Marafatto, Kalyan Kumar Radhakrishnan Santakumari, Roberto Ragazzoni, Valentina Viotto, Tom M. Herbst, Micah Klettke, Florian Briegel, Thomas Bertram, Peter Bizenberger, Richard J. Mathar, Fabio Santos, Moritz Plenz

Author Affiliations +

Proceedings Volume 11448, Adaptive Optics Systems VII; 114486B (2020) https://doi.org/10.1117/12.2562513
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

LINC-NIRVANA at the LBT has a dual MCAO system using solely natural guide stars. A multi pyramid WFS provides the slopes to close two independent loops for ground and high layer correction, as foreseen by the Layer Oriented scheme. The projection of the deformable mirrors actuators pattern on the WFS cameras rotates, since mechanical (ground) and optical (high) derotation provides the field rotation correction needed to keep the WFS on the reference stars. We reported in the previous conferences that we succeed in obtaining valid control matrices through numerical interpolation of a few calibrated interaction matrices registered for different clocking angle. We successfully tested a different approach based on a synthetic WFS and DM model. We proved that control matrices computed by the inversion of the interaction matrices generated from the model were effectively working on the real system closing high-order correction loop on the sky, providing better performance.

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Carmelo Arcidiacono, Maria Bergomi, Jacopo Farinato, Luca Marafatto, Kalyan Kumar Radhakrishnan Santakumari, Roberto Ragazzoni, Valentina Viotto, Tom M. Herbst, Micah Klettke, Florian Briegel, Thomas Bertram, Peter Bizenberger, Richard J. Mathar, Fabio Santos, and Moritz Plenz "Synthetic WFS model for LINC-NIRVANA interaction matrices", Proc. SPIE 11448, Adaptive Optics Systems VII, 114486B (13 December 2020); https://doi.org/10.1117/12.2562513

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