Computer Science – Performance
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993itns...40..162d&link_type=abstract
IEEE Transactions on Nuclear Science (ISSN 0018-9499), vol. 40, no. 2, p. 162-165.
Computer Science
Performance
9
Bolometers, Electric Bridges, Infrared Telescopes, Spaceborne Telescopes, Alternating Current, Field Effect Transistors, Heat Sinks
Scientific paper
We report the performance of an ac bridge readout system that has been developed for use on the Infrared Telescope in Space which is scheduled for launch in 1994. The ac bridge readout provides excellent dc stability enabling observing strategies well-suited to space-borne observations. The ability to modulate the optical signal slowly allows the use of new, highly sensitive, long time-constant bolometers. At 300 mK, the bolometers have an electrical noise equivalent power of 3 x 10 exp -17 W/sq rt Hz. The total noise of the differential signal, including amplifier noise, is less than 8 x 10 exp -17 W/sq rt Hz at frequencies as low as 35 mHz.
Devlin Mark
Lange Andrew E.
Sato Sasumu
Wilbanks T.
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