The calibration procedure of the LINC-NIRVANA ground and high layer WFS

Arcidiacono, Carmelo; Santhakumari, Kalyan Kumar R.; Viotto, Valentina; Bergomi, Maria; Briegel, Florian; Bertram, Thomas; Marafatto, Luca; Herbst, Tom; Farinato, Jacopo; Ragazzoni, Roberto; Hofferbert, Ralph; Kürster, Martin; Kittmann, Frank; Berwein, Jürgen; Baumeister, Harald

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The calibration procedure of the LINC-NIRVANA ground and high layer WFS

MPS-Authors

Arcidiacono, Carmelo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Santhakumari, Kalyan Kumar R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Viotto, Valentina
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bergomi, Maria
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Briegel, Florian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bertram, Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Marafatto, Luca
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Herbst, Tom
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Farinato, Jacopo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ragazzoni, Roberto
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hofferbert, Ralph
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kürster, Martin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kittmann, Frank
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Berwein, Jürgen
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Baumeister, Harald
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018SPIE10703E..4RA
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Citation

Arcidiacono, C., Santhakumari, K. K. R., Viotto, V., Bergomi, M., Briegel, F., Bertram, T., et al. (2018). The calibration procedure of the LINC-NIRVANA ground and high layer WFS.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CF34-8

Abstract

LINC-NIRVANA (LN) is a MCAO module currently mounted on the Rear Bent Gregorian focus of the Large Binocular Telescope (LBT). It mounts a camera originally design to realize the interferometric imaging focal station of the LBT. LN follows the LBT strategy having two twin channels: a double Layer Oriented multi-conjugate adaptive optics system assists the two arms, supplying high order wave-front correction. In order to counterbalance the field rotation a mechanical derotation is applied for the two ground wave-front sensors, and an optical (K-mirror) one for the two high layers sensors, fixing the positions of the focal planes with respect to the pyramids aboard the wavefront sensors. The derotation introduces a pupil images rotation on the wavefront sensors changing the projection of the deformable mirrors on the sensor consequently. The soft real-time computer load the matrix corresponding to the needed at one degree step. Calibrations were performed in daytime only and using optical fibers.