Share Email Print
cover

Proceedings Paper

Thermal design of the SCUBA-2 instrument detector stage and enclosure
Author(s): Adam L. Woodcraft; Fred C. Gannaway; David C. Gostick; Dan Bintley
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The SCUBA-2 instrument is a new wide field submillimeter imager currently being designed for the James Clerk Maxwell telescope on Mauna Kea in Hawaii. The instrument will observe simultaneously in the 450 and 850 micron bands and has a field of view of approximately 50 square arcminutes. To meet the performance requirements the detectors require a heat sink at a temperature of 50 mK or lower, and must be surrounded by an enclosure at a temperature of 1.1 K or below. Cooling is provided by the mixing chamber and still of a cryogen-free dilution refrigerator (DR), via thermal links of the order of a metre in length. A challenging set of requirements result from the need for a small temperature drop between the detectors and the refrigerator insert despite the large distance between them, the need to provide flexibility in the links to allow for movement during thermal contraction, and the need to allow for the detectors to be removed from the cryostat. Further, the arrays require a mounting structure which provides rigid mechanical support from the 1-K stage yet causes a very small heat input to millikelvin stage. This paper describes the design which has been evolved to meet these difficult (and often conflicting) requirements.

Paper Details

Date Published: 8 October 2004
PDF: 9 pages
Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); doi: 10.1117/12.551479
Show Author Affiliations
Adam L. Woodcraft, Cardiff Univ. (United Kingdom)
Fred C. Gannaway, Cardiff Univ. (United Kingdom)
David C. Gostick, UK Astronomy Technology Ctr. (United Kingdom)
Dan Bintley, Cardiff Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 5498:
Millimeter and Submillimeter Detectors for Astronomy II
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington, Editor(s)

© SPIE. Terms of Use
Back to Top