Woods, S.
, Carter, A.
, Jung, T.
and Defibaugh, D.
(2019),
Nano-kelvin DC and AC Meissner-TES Thermometry, Applied Physics Letters, [online], https://doi.org/10.1063/1.5046670
(Accessed November 30, 2024)
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.
Nano-kelvin DC and AC Meissner-TES Thermometry
Published
Author(s)
, Adriaan C. Carter, Timothy M. Jung,
Abstract
The Meissner-TES is a relatively new type of high resolution cryogenic thermometer based upon a transition edge sensor (TES) which employs the magnetic transition of a superconductor to measure temperature. We have improved the signal-to-noise for DC sensing by a factor of 40, and developed a new AC mode which uses an oscillating magnetic field and lock-in technique with much lower noise than the DC mode. The thermometer was tuned in situ over a range of operating temperatures 10 to 50 times larger than the transition width of the superconductor, using an applied persistent magnetic field. The DC mode has nano-kelvin sensitivity for one minute averaging, and the AC mode has sensitivity near 100 nK for very small applied magnetic fields near 0.11 microTesla and one minute averaging. Practical nano-kelvin thermometry has been achieved using the Meissner-TES, and can be applied to high resolution temperature control, optical power scale realization, and the study of temperature-dependent phase transitions.Citation
Applied Physics Letters
Volume
90
Pub Type
Journals
Download Paper
Keywords
transition edge sensor, high resolution thermometry, Meissner effect, SQUID, cryogenic thermometry
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created February 3, 2019, Updated November 24, 2020