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Proceedings Paper

Development of the fibre positioning unit of MOONS
Author(s): David Montgomery; David Atkinson; Stephen Beard; William Cochrane; Holger Drass; Isabelle Guinouard; David Lee; William Taylor; Phil Rees; Steve Watson
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Paper Abstract

The Multi-Object Optical and Near-Infrared Spectrograph (MOONS) will exploit the full 500 square arcmin field of view offered by the Nasmyth focus of the Very Large Telescope and will be equipped with two identical triple arm cryogenic spectrographs covering the wavelength range 0.64μm-1.8μm, with a multiplex capability of over 1000 fibres. This can be configured to produce spectra for chosen targets and have close proximity sky subtraction if required. The system will have both a medium resolution (R~4000-6000) mode and a high resolution (R~20000) mode. The fibre positioning units are used to position each fibre independently in order to pick off each sub field of 1.0” within a circular patrol area of ~85” on sky (50mm physical diameter). The nominal physical separation between FPUs is 25mm allowing a 100% overlap in coverage between adjacent units. The design of the fibre positioning units allows parallel and rapid reconfiguration between observations. The kinematic geometry is such that pupil alignment is maintained over the patrol area. This paper presents the design of the Fibre Positioning Units at the preliminary design review and the results of verification testing of the advanced prototypes.

Paper Details

Date Published: 9 August 2016
PDF: 15 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990895 (9 August 2016); doi: 10.1117/12.2234183
Show Author Affiliations
David Montgomery, UK Astronomy Technology Ctr. (United Kingdom)
David Atkinson, UK Astronomy Technology Ctr. (United Kingdom)
Stephen Beard, UK Astronomy Technology Ctr. (United Kingdom)
William Cochrane, UK Astronomy Technology Ctr. (United Kingdom)
Holger Drass, Pontificia Univ. Católica de Chile (Chile)
Isabelle Guinouard, Observatoire de Paris (France)
David Lee, UK Astronomy Technology Ctr. (United Kingdom)
William Taylor, UK Astronomy Technology Ctr. (United Kingdom)
Phil Rees, UK Astronomy Technology Ctr. (United Kingdom)
Steve Watson, UK Astronomy Technology Ctr. (United Kingdom)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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