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Monolithic Si bolometer array for the Caltech Submillimeter Observatory

Wang, Ning and Hunter, T. R. and Benford, D. J. and Serabyn, E. and Phillips, T. G. (1994) Monolithic Si bolometer array for the Caltech Submillimeter Observatory. In: Instrumentation in Astronomy VIII. Proceedings of SPIE. No.2198. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 749-756. ISBN 0-8194-1493-X.

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We are developing a submillimeter continuum camera for the Caltech Submillimeter Observatory (CSO) located on Mauna Kea. The camera will employ a monolithic Si bolometer array which was developed by Mosley et al. at the NASA Goddard Space Flight Center (GSFC). The camera will be cooled to a temperature of about 300 mK in a ^3He cryostat, and will operate primarily at wavelengths of 350 and 450 micrometers. We plan to use a bolometer array with 1 x 24 directly illuminated pixels, each pixel of dimension 1 x 2 mm^2, which is about half of the F/4 beam size at these wavelengths. Each pixel is 10 - 12 micrometers thick and is supported only by four thin Si legs formed by wet chemical etch. The pixels are doped n-type by phosphorus implantation, compensated by boron implantation. Signals from the bolometer pixels are first amplified by cryogenically cooled FETs. The signals are further amplified by room-temperature amplifiers and then separately digitized by 16 bit A/D converters with differential inputs. The outputs of the A/D converters are fed into a digital signal processing board via fiber-optic cables. The electronics and data acquisition system were designed by the Goddard group. We will report the status of this effort.

Item Type:Book Section
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Wang, Ning0000-0002-8810-4554
Hunter, T. R.0000-0001-6492-0090
Benford, D. J.0000-0002-9884-4206
Additional Information:© 1994 SPIE--The International Society for Optical Engineering. We are very grateful to the group of people at GSFC, in particular to K. Boyce, and A. Szymkowiak. Without their help, this project would not have been possible. We also wish thank B. Mott and his staff in the microelectronics fabrication laboratory at GSFC, NASA, for fabricating the bolometer arrays and help us to bond the load resistors. This work is carried out under the NSF contract no: AST-9313929.
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Series Name:Proceedings of SPIE
Issue or Number:2198
Record Number:CaltechAUTHORS:20161021-133430750
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Official Citation:Ning Wang ; Todd R. Hunter ; Dominic J. Benford ; Eugene Serabyn ; Thomas G. Phillips and Samuel H. Moseley, Jr. "Monolithic Si bolometer array for the Caltech Submillimeter Observatory", Proc. SPIE 2198, Instrumentation in Astronomy VIII, 749 (June 1, 1994); doi:10.1117/12.176729;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71350
Deposited By: George Porter
Deposited On:21 Oct 2016 21:01
Last Modified:11 Nov 2021 04:43

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