Single superconducting quantum interference device multiplexer for arrays of low-temperature sensors
We present the design and experimental evaluation of a superconducting quantum interference device (SQUID) multiplexer for an array of low-temperature sensors. Each sensor is inductively coupled to a superconducting summing loop which, in turn, is inductively coupled to the readout SQUID. The flux-locked loop of the SQUID is used to null the current in the summing loop and thus cancel crosstalk. The sensors are biased with an alternating current, each with a separate frequency, and the individual sensor signals are separated by lock-in detection at the SQUID output. We have fabricated a prototype 8 channel multiplexer and discuss the application to a larger array.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205267
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 78; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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