Sub-kelvin current amplifier using DC-SQUID
- Kinnunen, Kimmo
- Nuottajarvi, Antti
- Pöyhönen, Sam
- Pekola, Jukka
- Luukanen, Arttu
- Sipilä, Heikki
- Suni, Ilkka
- Salmi, Jorma
- Seppä, Heikki
- Kiviranta, Mikko
Publication date
January 2000
DOIAbstract
We have set up a system where a low-noise DC-SQUID is used as a current amplifier. The SQUID output is read using a wide band electronics unit based on the noise cancellation scheme. The SQUID has been installed in a compact Nanoway PDR50 dilution refrigerator, and superconducting transitions of Ti/Au thermometer strips for X-ray calorimeter applications have been measured. We can operate at 100 mK using a SQUID with Pd shunt resistors. Noise and bandwidth results of the setup are presented
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