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Proceedings Paper

Towards the cryogenic sliding mechanism for MOONS-ESO
Author(s): A. Tozzi; L. Carbonaro; T. Oliva; M. Iuzzolino; J. Strachan; P. Rees II
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Paper Abstract

The Multi-Object Optical and Near-Infrared Spectrograph (MOONS) shall be installed at one of the Very Large Telescopes (VLT) at the European Southern Observatory (ESO) in Paranal Chile. The instrument is being designed and built by an international consortium on behalf of ESO. The design is based on a three arms configuration, RI, YJ and H band, where RI and H have two possible resolutions. To achieve this goal it will be necessary to implement a sliding mechanism changing the dispersers, the filters and the cross dispersion prisms. This article describes the cryogenic exchanger mechanism that is under realization and the preliminary mechanical and optical tests that we have done at the cryogenic facility of Arcetri observatory of Florence. Parts of these test are based on interferometric measurements of the optics to study the behaviour of the mechanical supporting structure, and part are based on the cryogenic sliding system that will be used to move approximately 200 Kg of mass for 350 mm of travel range. The cryogenic sliding system, rails, screws, motors, is based on commercial components as the position measurement device that is based on commercial potentiometers. The results of the tests and performances at cryogenic temperature are reported in this paper.

Paper Details

Date Published: 9 August 2016
PDF: 13 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99087Z (9 August 2016); doi: 10.1117/12.2231906
Show Author Affiliations
A. Tozzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
L. Carbonaro, INAF - Osservatorio Astrofisico di Arcetri (Italy)
T. Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
M. Iuzzolino, INAF - Osservatorio Astrofisico di Arcetri (Italy)
J. Strachan, Science and Technology Facilities Council (United Kingdom)
P. Rees II, Science and Technology Facilities Council (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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