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Proceedings Paper

Tests of open-loop LGS tomography with CANARY
Author(s): Timothy J. Morris; Alastair G. Basden; Fabrice Vidal; Andrew P. Reeves; Eric Gendron; Richard M. Myers; Zoltan Hubert; Edward J. Younger; Andy Longmore; Matthieu Cohen; Nigel Dipper; Paul Clark; David Henry; Gérard C. Rousset; Stephen P. Todd; Fanny Chemla; David C. Atkinson; Jean-Michel Huet; Brian Stobie; Colin J. Dickson
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Paper Abstract

CANARY is an on-sky demonstrator adaptive optics (AO) system that in 2010 provided the first on-sky demonstration of open-loop tomographic adaptive optics correction using natural guide stars (NGS). Phase B of the CANARY experiment aims to extend the instrument from its original configuration by also measuring wavefronts from four offaxis Rayleigh laser guide stars (LGS). This upgrade allows CANARY to perform tomographic wavefront sensing over a 2.5arcminute field of view using any mix of up to seven off-axis wavefront sensors (four LGS and three NGS) simultaneously. AO correction within CANARY is performed on-axis along a single line of sight using a 52-actuator deformable mirror being controlled in open-loop. Here we give an overview of the Phase B LGS system, discuss the calibration of a mixed NGS/LGS tomographic system and present the recent laboratory and on-sky results from the Phase B commissioning.

Paper Details

Date Published: 13 September 2012
PDF: 9 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84470K (13 September 2012); doi: 10.1117/12.926985
Show Author Affiliations
Timothy J. Morris, Durham Univ. (United Kingdom)
Alastair G. Basden, Durham Univ. (United Kingdom)
Fabrice Vidal, Observatoire de Paris (France)
Andrew P. Reeves, Durham Univ. (United Kingdom)
Eric Gendron, Observatoire de Paris (France)
Richard M. Myers, Durham Univ. (United Kingdom)
Zoltan Hubert, Observatoire de Paris (France)
Edward J. Younger, Durham Univ. (United Kingdom)
Andy Longmore, UK Astronomy Technology Ctr. (United Kingdom)
Matthieu Cohen, Observatoire de Paris (France)
Nigel Dipper, Durham Univ. (United Kingdom)
Paul Clark, Durham Univ. (United Kingdom)
David Henry, UK Astronomy Technology Ctr. (United Kingdom)
Gérard C. Rousset, Observatoire de Paris (France)
Stephen P. Todd, UK Astronomy Technology Ctr. (United Kingdom)
Fanny Chemla, Observatoire de Paris (France)
David C. Atkinson, UK Astronomy Technology Ctr. (United Kingdom)
Jean-Michel Huet, Observatoire de Paris (France)
Brian Stobie, UK Astronomy Technology Ctr. (United Kingdom)
Colin J. Dickson, UK Astronomy Technology Ctr. (United Kingdom)


Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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