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Proceedings Paper

JCMT Telescope structure modifications and facility upgrades for SCUBA-2 instrument
Author(s): Tomas Chylek; Simon C. Craig; Timothy C. Chuter; Harry J. Lewsley; Edward A. Hileman
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Paper Abstract

The James Clerk Maxwell Telescope (JCMT) on the summit of Mauna Kea is currently undergoing significant structural upgrade in order to accommodate the new generation instrument SCUBA-2 (Submillimeter Common-User Bolometric Array) which is being developed by the United Kingdom Astronomy Technology Centre (UK ATC). This four tonne instrument will be located at the Nasmyth focus of the telescope and will require five large auxiliary external warm mirrors to be installed on the telescope structure and in the receiver cabin along with dedicated automatically deployable tertiary mirror. The carousel of the observatory building as well as the original telescope structure was not designed for an instrument of this mass and complexity. The whole left Nasmyth platform of the telescope has to be removed and rebuilt in order to accommodate the instrument, its support structure and the warm optics. The floor of the observatory has to be reinforced and fitted with rail system and a scissor lift in order to handle the installation of the instrument on the telescope and removal from the telescope for maintenance. Details are given of particular challenges associated with handling, mechanical interfacing, optical alignment, design of the external warm mirrors mounts and the tertiary mirror deployment mechanism for SCUBA-2.

Paper Details

Date Published: 23 June 2006
PDF: 9 pages
Proc. SPIE 6267, Ground-based and Airborne Telescopes, 62673L (23 June 2006); doi: 10.1117/12.672615
Show Author Affiliations
Tomas Chylek, Joint Astronomy Ctr. (United States)
Simon C. Craig, Joint Astronomy Ctr. (United States)
Timothy C. Chuter, Joint Astronomy Ctr. (United States)
Harry J. Lewsley, M3 Engineering & Technology Corp. (United States)
Edward A. Hileman, National Optical Astronomy Observatory (United States)


Published in SPIE Proceedings Vol. 6267:
Ground-based and Airborne Telescopes
Larry M. Stepp, Editor(s)

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