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SCUBA-2: a large-format TES array for submillimetre astronomy

Audley, M. D., Holland, W. S., Duncan, W. D., Atkinson, D., Cliffe, M., Ellis, M., Gao, X., Gostick, D. C., Hodson, T., Kelly, D., MacIntosh, M. J., McGregor, H., Peacocke, T., Robson, I., Smith, I., Irwin, K. D., Hilton, G. C., Ullom, J. N., Walton, A., Dunare, C., Parkes, W., Ade, Peter A. R., Bintley, Dan, Gannaway, Frederick Charles, Griffin, Matthew Joseph, Pisano, Giampaolo, Sudiwala, Rashmikant V., Walker, Ian Kenneth, Woodcraft, Adam, Fich, M., Halpern, M., Mitchell, G., Naylor, D. and Bastien, P. 2004. SCUBA-2: a large-format TES array for submillimetre astronomy. Nuclear instruments and methods in physics research Section A 520 (1-3) , pp. 479-482. 10.1016/j.nima.2003.11.378

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Abstract

SCUBA-2, which replaces the Submillimetre Common User Bolometer Array (SCUBA) (Mon. Not. R. Astron. Soc. 303 (1999) 659) on the James Clerk Maxwell telescope in 2006, will be the first CCD-like 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 an 8×8 arcmin field of view at wavelengths of 850 and 450 μm. 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 submillimetre interferometers such as ALMA. SCUBA-2's absorber-coupled pixels use superconducting transition edge sensors (Ph.D. Thesis, Stanford, 1995) operating at 120 mK for photon noise limited performance. The monolithic silicon detector arrays are deep-etched by the Bosch process to isolate the pixels on silicon nitride membranes (Nucl. Instr. and Meth. A, these proceedings). Electrical connections are made through indium bump bonds to a backplane that incorporates a SQUID time-domain multiplexer. We describe the key technologies that make SCUBA-2 possible and give an update on the considerable progress in the detector development and instrument design that has taken place over the last 2 years

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Submillimeter detector array ; Transition edge sensor ; TES Bolometer array ; SQUID multiplexer
Publisher: North Holland
ISSN: 0168-9002
Last Modified: 19 Dec 2017 02:36
URI: http://orca-mwe.cf.ac.uk/id/eprint/1530

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