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An update on the SCUBA-2 project

Audley, Michael D., Holland, Wayne S., Hodson, Trevor, Macintosh, Michael, Robson, Ian, Irwin, Kent D., Hilton, Gene, Duncan, William D., Reintsema, Carl, Walton, Anthony J., Parkes, William, Ade, Peter A. R., Walker, Ian Kenneth, Fich, Mike, Kycia, Jan, Halpern, Mark, Naylor, David A., Mitchell, George and Bastien, Pierre 2004. An update on the SCUBA-2 project. Presented at: Millimeter and Submillimeter Detectors for Astronomy II, Glasgow, UK, 23-25 June 2004. Published in: Zmuidzinas, Jonas, Holland, Wayne S. and Withington, Stafford eds. Millimeter and Submillimeter Detectors for Astronomy II 68(Proceedings). Proceedings of the SPIE , vol. 5498. Bellingham WA: The International Society for Optical Engineering, pp. 63-77. 10.1117/12.551259

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Abstract

SCUBA-2, which replaces SCUBA (the Submillimeter Common User Bolometer Array) on the James Clerk Maxwell Telescope (JCMT) in 2006, is a large-format bolometer array for submillimeter astronomy. Unlike previous detectors which have used discrete bolometers, SCUBA-2 has two dc-coupled, monolithic, filled arrays with a total of ~10,000 bolometers. It will offer simultaneous imaging of a 50 sq-arcmin field of view at wavelengths of 850 and 450 microns. SCUBA-2 is expected to have a huge impact on the study of galaxy formation and evolution in the early Universe as well as star and planet formation in our own Galaxy. Mapping the sky to the same S/N up to 1000 times faster than SCUBA, it will also act as a pathfinder for the new submillimeter interferometers such as ALMA. SCUBA-2's absorber-coupled pixels use superconducting transition edge sensors operating at 120 mK for performance limited by the sky background photon noise. The monolithic silicon detector arrays are deep-etched by the Bosch process to isolate the pixels on silicon nitride membranes. Electrical connections are made through indium bump bonds to a SQUID time-domain multiplexer (MUX). We give an overview of the SCUBA-2 system and an update on its status, and describe some of the technological innovations that make this unique instrument possible.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Astronomy; Bolometers; Detector arrays; Equipment and services; Galaxy evolution; Indium; Interferometers; Multiplexers; Photons; Planets
Publisher: The International Society for Optical Engineering
ISBN: 9780819454300
ISSN: 0277-786X
Related URLs:
Last Modified: 04 Jun 2017 04:41
URI: http://orca.cf.ac.uk/id/eprint/42880

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