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Proceedings Paper

Design and fabrication of two-dimensional semiconducting bolometer arrays for the High-Resolution Airborne Wideband Camera (HAWC) and the Submillimeter High Angular Resolution Camera II (SHARC-II)
Author(s): George M. Voellmer; Christine A. Allen; Michael J. Amato; Sachidananda R. Babu; Arlin E. Bartels; Dominic J. Benford; Rebecca J. Derro; C. Darren Dowell; D. Al Harper; Murzy D. Jhabvala; S. Harvey Moseley; Timothy Rennick; Peter J. Shirron; W. Wayne Smith; Johannes G. Staguhn
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Paper Abstract

The High resolution Airborne Wideband Camera (HAWC) and the Submillimeter High Angular Resolution Camera II (SHARC II) will use almost identical versions of an ion-implanted silicon bolometer array developed at the National Aeronautics and Space Administration's Goddard Space Flight Center (GSFC). The GSFC "Pop-Up" Detectors (PUD's) use a unique folding technique to enable a 12 × 32-element close-packed array of bolometers with a filling factor greater than 95 percent. A kinematic Kevlar suspension system isolates the 200 mK bolometers from the helium bath temperature, and GSFC - developed silicon bridge chips make electrical connection to the bolometers, while maintaining thermal isolation. The JFET preamps operate at 120 K. Providing good thermal heat sinking for these, and keeping their conduction and radiation from reaching the nearby bolometers, is one of the principal design challenges encountered. Another interesting challenge is the preparation of the silicon bolometers. They are manufactured in 32-element, planar rows using Micro Electro Mechanical Systems (MEMS) semiconductor etching techniques, and then cut and folded onto a ceramic bar. Optical alignment using specialized jigs ensures their uniformity and correct placement. The rows are then stacked to create the 12 × 32-element array. Engineering results from the first light run of SHARC II at the Caltech Submillimeter Observatory (CSO) are presented.

Paper Details

Date Published: 17 February 2003
PDF: 10 pages
Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); doi: 10.1117/12.459315
Show Author Affiliations
George M. Voellmer, NASA Goddard Space Flight Ctr. (United States)
Christine A. Allen, NASA Goddard Space Flight Ctr. (United States)
Michael J. Amato, NASA Goddard Space Flight Ctr. (United States)
Sachidananda R. Babu, NASA Goddard Space Flight Ctr. (United States)
Arlin E. Bartels, NASA Goddard Space Flight Ctr. (United States)
Dominic J. Benford, NASA Goddard Space Flight Ctr. (United States)
Rebecca J. Derro, NASA Goddard Space Flight Ctr. (United States)
C. Darren Dowell, California Institute of Technology (United States)
D. Al Harper, Univ. of Chicago (United States)
Murzy D. Jhabvala, NASA Goddard Space Flight Ctr. (United States)
S. Harvey Moseley, NASA Goddard Space Flight Ctr. (United States)
Timothy Rennick, Univ. of Chicago (United States)
Peter J. Shirron, NASA Goddard Space Flight Ctr. (United States)
W. Wayne Smith, Orbital Sciences Corp. (United States)
Johannes G. Staguhn, Science Systems and Applications, Inc. (United States)


Published in SPIE Proceedings Vol. 4855:
Millimeter and Submillimeter Detectors for Astronomy
Thomas G. Phillips; Jonas Zmuidzinas, Editor(s)

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