Demonstration of a Pixel-Scale Superconducting Heat Switch for an Ideal Integrating Bolometer
| Autor: | Edgar Canavan, Mason Mok, Thomas R. Stevenson, Peter C. Nagler |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Bolometer Conductance STRIPS Condensed Matter Physics 01 natural sciences Temperature measurement Electronic Optical and Magnetic Materials law.invention Thermal conductivity law Electromagnetic coil 0103 physical sciences Optoelectronics Electrical and Electronic Engineering 010306 general physics Phonon noise business 010303 astronomy & astrophysics Ground plane |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 27:1-5 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2017.2664830 |
| Popis: | The sensitivity of a bolometer is in principle limited by the phonon noise, which is a function of the conductance between its absorber and the thermal sink. However, practical issues limit the degree to which conductance can be minimized. For example, in a high-radiation environment, extremely low conductance, or, equivalently, long thermal recovery time, can lead to high data loss. To circumvent such limitations, we are developing a technique of modulating the conductance through the use of pixel-scale superconducting heat switches. We have fabricated bolometer-like test devices consisting of isolated regions connected to a thermal ground plane through narrow aluminum strips. Niobium coils are patterned around the aluminum strips. Flowing current through a coil allows the aluminum to be driven into the normal or high thermal conductance state. We have measured the conductance of these devices as a function of temperature and drive coil current. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|