Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Characterization and Reduction of Unexplained Noise in Superconducting Transition-Edge Sensors



Joel N. Ullom, William B. Doriese, Gene C. Hilton, James A. Beall, Steven Deiker, William Duncan, S. L. Ferreira, Kent D. Irwin, Carl D. Reintsema, Leila R. Vale


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.
Applied Physics Letters


microcalorimeter, transition-edge sensor, unexplained noise


Ullom, J. , Doriese, W. , Hilton, G. , Beall, J. , Deiker, S. , Duncan, W. , Ferreira, S. , Irwin, K. , Reintsema, C. and Vale, L. (2004), Characterization and Reduction of Unexplained Noise in Superconducting Transition-Edge Sensors, Applied Physics Letters, [online], (Accessed July 15, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created May 7, 2004, Updated February 19, 2017