DocumentCode :
1122650
Title :
Characterization of Antenna-Coupled TES Bolometers for the Spider Experiment
Author :
Bonetti, Joseph A. ; Day, Peter K. ; Kenyon, Matthew ; Kuo, Chao-Lin ; Turner, Anthony ; LeDuc, H.G. ; Bock, James J.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Volume :
19
Issue :
3
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
520
Lastpage :
523
Abstract :
We describe the transition-edge-sensors (TES´s) to be employed on the Spider experiment, a balloon-based observatory whose goal is detecting the imprint of gravitational waves by mapping the polarization of the cosmic microwave background (CMB). The devices consist of Ti and Al thermistors in series sitting on a thermally isolated suspended membrane. Also on the membrane is a termination resistor coupled through a superconducting microstrip line to an on-chip, polarization sensitive, 150 GHz slot-array antenna. Several important parameters were measured. Transition temperatures were deduced by measuring the Johnson noise in the Ti thermistor. The thermal conductance between the isolated TES islands and substrate was measured by obtaining current-voltage measurements at various temperatures. The Electrical noise equivalent power was measured to sub-Hertz frequencies with varying sample geometries including those with and without normal metal bars (zebra stripes). Finally, the time constant of the devices was measured within the Al and Ti transitions where electrothermal feedback speeds up the bolometer response. This time response is compared with the natural time constant measured just above the Ti transition temperature. The results of these measurements are within the design specifications for Spider.
Keywords :
aluminium; bolometers; microstrip lines; superconducting device noise; superconducting microwave devices; superconducting particle detectors; thermal conductivity; thermistors; titanium; Al; Johnson noise; Spider experiment; Ti; antenna-coupled TES bolometers; balloon-based observatory; cosmic microwave background; electrical noise equivalent power; electrothermal feedback; frequency 150 GHz; gravitational waves; slot-array antenna; superconducting microstrip line; thermal conductance; thermally isolated suspended membrane; thermistors; time response; transition edge sensors; transition temperatures; CMB; TES bolometers; cosmic microwave background; polarization;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2009.2019297
Filename :
5153085
Link To Document :
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