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Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1996.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
10 pages : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In the current generation of high-{Tc} bolometers the thermal conductance is often chosen for a short time-constant rather than for optimal sensitivity. We describe a novel bolometer bias and readout scheme that promises to relax this constraint. Voltage bias of the superconductor results in strong negative electrothermal feedback that greatly reduces the time-constant of the bolometer. We estimate that a decrease of more than one order of magnitude in time-constant should be possible with existing high-Tc thermometers. We give theoretical estimates of the performance gain with voltage bias for several bolometers that have been reported in the literature. We find cases where the sensitivity can be greatly improved (by changing the thermal conductance) while holding the time constant fixed and others where the bolometer can be made much faster while maintaining the sensitivity.
Report Numbers
E 1.99:lbnl--39320
E 1.99: conf-960850--19
conf-960850--19
lbnl--39320
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/1996.
"lbnl--39320"
" conf-960850--19"
"DE97001223"
Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996.
Richards, P.L.; Lee, A.T.; Gildemeister, J.M.; Lee, Shih-Fu.
Funding Information
AC03-76SF00098
View MARC record | catkey: 14111149