CANARY Phase B: the LGS upgrade to the CANARY tomographic MOAO pathfinder
T. Morris, Z. Hubert, F. Chemla, S. Todd, E. Gendron, J-M. Huet, E. Younger, A. Basden, N. Dipper, D. Geng, D. Atkinson, M. Marteaud, A. Longmore , P. Clark, D. Henry, C. Dickson, F. Vidal, P. Laporte, C. Dunlop, D. Cano, G. Talbot, G. Rousset and R. Myers
University of Durham, Durham, UK. Observatoire de Paris, Paris, France. UK Astronomy Technology Centre, Edinburgh, UK. Isaac Newton Group of Telescopes, La Palma, Spain.
CANARY has been designed to demonstrate full tomographic LGS MOAO in a configuration as close as possible to that of the proposed EAGLE instrument for the E-ELT. A phased approach to the instrument development has been adopted to reduce the overall risk and developmental complexity with the initial Phase A system performing NGS MOAO only using three off-axis NGS WFS. The Phase B system will add four off-axis open-loop LGS WFSs to this system allowing combined LGS/NGS tomography to be performed, thereby taking CANARY one step closer to an EAGLE-like configuration. The upgrade to include LGS within CANARY requires several new and upgrades subsystems, including a multiple LGS launch system, LGS WFSs and a new LGS calibration unit. Here we present the requirements, design, and subsystem performance for the Phase B system, as well as simulations of the on-sky AO performance of CANARY.