A dc SQUID for use below 1 K
For detection of weak signals, and for use on ultralow temperature experiments, it would be useful to have a robust superconducting quantum interference device (SQUID) amplifier that works below 1 K. We report on a test of a commercial SQUID amplifier that has lower noise than others we have tested, and works well while attached to a 50-mK chamber. The SQUID noise was improved only modestly when cooled from 4 K to 50 mK. The best energy resolution measured was 2200 h.
Publication Source (Journal or Book title)
Review of Scientific Instruments
Geng, Z., Adams, P., Hamilton, W., Johnson, W., & Solomonson, N. (1993). A dc SQUID for use below 1 K. Review of Scientific Instruments, 64 (5), 1319-1323. https://doi.org/10.1063/1.1144086