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Characterization of a prototype SCUBA-2 1280-pixel submillimetre superconducting bolometer array.

Society of Photo-Optical Instrumentation Engineers (SPIE)

We present the results of characterization measurements on a 1280 pixel superconducting bolometer array designed for operation at wavelengths around 450 μm. The array is a prototype for the sub-arrays which will form the focal plane for the SCUBA-2 sub-mm camera, being built for the James Clerk Maxwell Telescope (JCMT) in Hawaii. With over 10 000 pixels in total, it will provide a huge improvement in both sensitivity and mapping speed over existing instruments. The array consists of molybdenum-copper bi-layer TES (transition edge sensor) pixels, bonded to a multiplexer. The detectors operate at a temperature of approximately 175 mK, and require a heat sink at a temperature of approximately 60 mK. In contrast to previous TES arrays, the multiplexing elements are located beneath each pixel (an "in-focal plane" configuration). We present the results of electrical and optical measurements, and show that the optical NEP (noise equivalent power) is less than 1.4 × 10-16 W Hz-0.5 and thus within the goal of 1.5 × 10-16 W Hz-0.5. Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Text

2011-09-14

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/37304

Woodcraft, Adam L.; Hollister, Matthew I.; Bintley, Dan; Ellis, Maureen A.; Gao, Xiaofeng; Holland, Wayne S.; MacIntosh, Michael J.; Ade, Peter A. R.; House, Julian S.; Hunt, Cynthia L.; Sudiwala, Rashmi V.; Duncan, William D.; Hilton, Gene C.; Irwin, Kent D.; Reintsema, Carl D.; Dunare, Camelia C.; Parkes, William; Walton, Anthony J.; Kycia, Jan B.; Amiri, Mandana; Burger, Bryce; Halpern, Mark. Characterization of a prototype SCUBA-2 1280-pixel submillimetre superconducting bolometer array. Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III, edited by Jonas Zmuidzinas, Wayne S. Holland, Stafford Withington, William D. Duncan, Proceedings of SPIE Volume 6275, 62751F, 2006.

Reviewed

Halpern, Mark

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