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Proceedings Paper

DRAGON-NG: a configurable and capable AO test-bench
Author(s): Nazim A. Bharmal; Urban Bitenc; David G. Bramall; Nigel A. Dipper; Cornelis M. Dubbeldam; Andrew P. Reeves; Colin Dunlop; Stephen Rolt; Eddy J. Younger; Richard M. Myers
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Paper Abstract

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-shelf components 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 emulation at 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 dioptric and permits long cable runs to a compact real-time control system which 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.

Paper Details

Date Published: 27 July 2016
PDF: 6 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99094B (27 July 2016); doi: 10.1117/12.2231694
Show Author Affiliations
Nazim A. Bharmal, Univ. of Durham (United Kingdom)
Urban Bitenc, Univ. of Durham (United Kingdom)
David G. Bramall, Univ. of Durham (United Kingdom)
Nigel A. Dipper, Univ. of Durham (United Kingdom)
Cornelis M. Dubbeldam, Univ. of Durham (United Kingdom)
Andrew P. Reeves, Univ. of Durham (United Kingdom)
Colin Dunlop, Univ. of Durham (United Kingdom)
Stephen Rolt, Univ. of Durham (United Kingdom)
Eddy J. Younger, Univ. of Durham (United Kingdom)
Richard M. Myers, Univ. of Durham (United Kingdom)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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