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Title: Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback

Abstract

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.

Authors:
 [1];  [2]; ;  [3]
  1. California Univ., Berkeley, CA (United States). Center for Particle Astrophysics
  2. California Univ., Berkeley, CA (United States). Dept. of Physics
  3. Lawrence Berkeley National Lab., CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
415209
Report Number(s):
LBNL-39320; CONF-960850-19
ON: DE97001223
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996; Other Information: PBD: Aug 1996
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; BOLOMETERS; SENSITIVITY; SUPERCONDUCTING DEVICES; PERFORMANCE; FEEDBACK; THERMAL CONDUCTION; TIME RESOLUTION; HIGH-TC SUPERCONDUCTORS; SQUID DEVICES; ELECTRICAL ENGINEERING

Citation Formats

Lee, A T, Gildemeister, J M, Lee, Shih-Fu, and Richards, P L. Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback. United States: N. p., 1996. Web.
Lee, A T, Gildemeister, J M, Lee, Shih-Fu, & Richards, P L. Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback. United States.
Lee, A T, Gildemeister, J M, Lee, Shih-Fu, and Richards, P L. 1996. "Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback". United States. https://www.osti.gov/servlets/purl/415209.
@article{osti_415209,
title = {Voltage-biased high-{Tc} superconducting infrared bolometers with strong electrothermal feedback},
author = {Lee, A T and Gildemeister, J M and Lee, Shih-Fu and Richards, P L},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/415209}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Aug 01 00:00:00 EDT 1996},
month = {Thu Aug 01 00:00:00 EDT 1996}
}

Conference:
Other availability
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