DRAGON-NG: a configurable and capable AO test-bench
2016
An astronomical
adaptive optics
test-bench, designed to replicate the conditions of a 4 m-class telescope, is presented. Named DRAGON-Next Generation, it is constructed primarily from
commercial off-the-
shelfcomponents with minimal customization (approximately a 90:10 ratio). This permits an optical design which is modular and this leads to a reconfigurability. DRAGON-NG has been designed for operation for the following modes: (high-order) SCAO, (twin-DM) MOAO, and (twin-DM) MCAO. It is capable of open-loop or closed-loop operation, with (3) natural and (3)
laser guide-star
emulationat loop rates of up to 200Hz. Field angles of up-to 2.4 arcmin (4m pupil
emulation) can pass through the system. The design is
dioptricand permits long cable runs to a compact
real-time control systemwhich is on-sky compatible. Therefore experimental validation can be carried out on DRAGON-NG before transferring to an on-sky system, which is a significant risk mitigation.
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