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Proceedings Paper

Design and performance of feedhorn-coupled bolometer arrays for SPIRE
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Paper Abstract

This paper reviews the design, modeling, and testing of feedhorn arrays coupled to bolometric detector arrays being developed for the ESA Herschel Space Observatory's SPIRE instrument. SPIRE will incorporate five arrays of silicon nitride micromesh bolometers, in three broadband photometers and two Fourier-Transform spectrometers covering 200-700 μm, with a total of 326 feedhorn-coupled bolometers. The precision feedhorn arrays are formed by close-packing individually fabricated conical feedhorns, which terminate in waveguides and integrating cavities. The detector array is efficiently packaged by mounting it between a metallized silicon backshort array and the feedhorn array, which encloses the bolometers in precisely tuned integrating cavities. The absorption efficiency, bandwidth, and cross talk were first investigated with numerical simulations of the electromagnetic fields, and then measured for prototype arrays in a test facility. This discussion describes the design goals, simulations, fabrication, and measurements of optical efficiencies, spectral properties, beam shapes, and cross talk between bolometers.

Paper Details

Date Published: 17 February 2003
PDF: 10 pages
Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); doi: 10.1117/12.459372
Show Author Affiliations
Brooks Rownd, Univ. of Colorado/Boulder (United States)
James J. Bock, Jet Propulsion Lab. (United States)
Goutam Chattopadhyay, California Institute of Technology (United States)
Jason Glenn, Univ. of Colorado/Boulder (United States)
Matthew J. Griffin, Univ. of Wales/Cardiff (United Kingdom)

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

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