Publications (3)0 Total impact
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Conference Proceeding: Large filled arrays of bolometers for ground-based and airborne far-infrared and submillimeter astronomy
SPIE, Glasgow; 06/2004 -
Conference Proceeding: Arrays of Bolometers for Far-infrared and Submillimeter Astronomy
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ABSTRACT: ANTe describe 12 x 32 arrays of senlicoladucting cryogenic bolometers designed for use in far-infrared and submillimeter cameras. These 12 x 32 arrays are constructed from 1 x 32 monolithic pop-up detectors developed at NASA Goddard Space Flight Center. The pop-up technology allows the construction of large arrays with high filling factors that provide efficient use of space in the focal planes of far-infrared and submillimeter astronomical instruments. This directly leads to a significant decrease in integration time. The prototype array is currently operating in the second generation Submillimeter High Angular Resolution Camera (SHAR( II), a facility instrument in use at the Caltech Submillimeter Observatory ((1S0). The elements of this array enlploy a bismuth absorber coating and quarter wave backshort to opthnize the bolometer alp sorption for a passbands centered at 350 and 450 microns. A second array is to be installed in the High-resolution Airborne Widebandwidth Caniera (HAW( ), a far-infrared imaging camera for the Stratospheric Observatory for Trifrared AstronOTTly (SOFIA). This array has heel] COMpleted and is now awaiting integration into the HAWC test cryostat. HAWC is scheduled for commissioning in 2005. The HAWC array employs titanium-gold absorbers and is optimized for uniforin absorption from 40 to 300 microns to accommodate all four of its far-infrared pa.ssbands. We describe the details of the HAWC array construction including the mechanical design and electrical characterization of the constituent linear arrays.15th International Symposium on Space Terahertz Technology; 04/2004 -
Article: Arrays of Bolometers for Far-infrared and Submillimeter Astronomy
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ABSTRACT: We describe 12 x 32 arrays of semiconducting cryogenic bolometers designed for use in far-infrared and submillimeter cameras. These 12 x 32 arrays are constructed from 1 x 32 monolithic pop-up detectors developed at NASA Goddard Space Flight Center. The pop-up technology allows the construction of large arrays with high filling factors that provide efficient use of space in the focal planes of far-infrared and submillimeter astronomical instruments. This directly leads to a significant decrease in observing time. The prototype array is currently operating in SHARC II, a facility instrument in use at the Caltech Submillimeter Observatory (CSO). The elements of this array employ a bismuth absorber coating and quarter wave backshort to optimize the bolometer absorption for a passband centered at 350 microns. However, this resonant structure also provides good bolometer performance at 450 and 850 microns, the two additional SHARC II passbands. A second array is to be installed in the High-resolution Airborne Widebandwidth Camera (HAWC), a far-infrared imaging camera for the Stratospheric Observatory for Infrared Astronomy (SOFIA). This array is currently in the final stage of construction, and its completion is expected in early 2004. HAWC is scheduled for commissioning in 2005. The HAWC array employs titanium-gold absorbers and is optimized for uniform absorption from 40 to 300 microns to accommodate all four of its far-infrared passbands. We describe the details of the array construction including the mechanical design and electrical characterization of the constituent linear arrays, comparing the SHARC II and HAWC cases. We also summarize the overall characteristics of the final two-dimensional arrays. Finally, we show examples of array performance in the form of images obtained with SHARC II.02/2004;
