TITLE

Characterization and reduction of unexplained noise in superconducting transition-edge sensors

AUTHOR(S)
Ullom, J. N.; Doriese, W. B.; Hilton, G. C.; Beall, J. A.; Deiker, S.; Duncan, W. D.; Ferreira, L.; Irwin, K. D.; Reintsema, C. D.; Vale, L. R.
PUB. DATE
May 2004
SOURCE
Applied Physics Letters;5/24/2004, Vol. 84 Issue 21, p4206
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The noise in superconducting transition-edge sensors (TESs) commonly exceeds simple theoretical predictions. The reason for this discrepancy is presently unexplained. We have measured the amplitude and frequency dependence of the noise in TES sensors with eight different geometries. In addition, we have measured the dependence of the noise on operating resistance, perpendicular magnetic field, and bath temperature. We find that the unexplained noise contribution is inversely correlated with the temperature width of the superconducting-to-normal transition and is reduced by a perpendicular field and in certain geometries. These results suggest paths to improved sensor performance. © 2004 American Institute of Physics.
ACCESSION #
13077529

 

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