| Author(s): |
Solomon I. Woods; Stephen M. Carr; Timothy M. Jung; Adriaan C. Carter; Raju V. Datla; |
| Title: |
Demonstration of a Meissner-Effect Transition Edge Sensor |
| Published: |
July 26, 2010 |
| Abstract: |
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. |
| Citation: |
Journal of Applied Physics |
| Volume: |
108 |
| Pages: |
pp. 024505-1 - 024505-5 |
| Keywords: |
absolute cryogenic radiometer; paramagnetic salt thermometer; radiometry; SQUID readout; transition edge sensor |
| Research Areas: |
Radiometry |
| PDF version: |
 Click here to retrieve PDF version of paper (156KB) |
