Demonstration of a Meissner-Effect Transition Edge Sensor
Solomon I. Woods, Stephen M. Carr, Timothy M. Jung, Adriaan C. Carter, Raju V. Datla
We have built and tested a transition edge sensor which monitors temperature change by measuring magnetic flux expulsion from a superconducting element. Flux change is sensed by a dc SQUID coupled to the element using a flux transformer in a gradiometer arrangement. The operating temperature of the sensor can be varied by application of moderate magnetic fields to the superconducting core, using an integrated solenoid. With a Sn core at 3.58 K, the thermometer has demonstrated a noise level of 2.25 nK/rtHz. We estimate that such a sensor will allow femtowatt sensitivity of an absolute cryogenic radiometer presently under development.
, Carr, S.
, Jung, T.
, Carter, A.
and Datla, R.
Demonstration of a Meissner-Effect Transition Edge Sensor, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904199
(Accessed September 28, 2023)