Quantum Roulette Noise Thermometer: Progress and prospects

A novel form of primary thermometer called the Quantum Roulette Noise Thermometer (QRNT) has been fabricated and is presently undergoing feasibility studies. This device utilises flux quantisation in a high temperature superconducting ring interrupted by two closely spaced, parallel, Josephson junct...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.859-862
Main Authors: Lee, R.A.M., Hao, L., Peden, D.A., Gallop, J.C., Macfarlane, J.C., Romans, E.J.
Format: Article
Language:English
Subjects:
Applied sciences
Critical current
Electronics
Exact sciences and technology
Fluctuations
High temperature superconductors
Inductance
Josephson junctions
Metastasis
Quantization
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Statistical distributions
Superconducting device noise
Superconducting devices
Temperature dependence
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Summary:A novel form of primary thermometer called the Quantum Roulette Noise Thermometer (QRNT) has been fabricated and is presently undergoing feasibility studies. This device utilises flux quantisation in a high temperature superconducting ring interrupted by two closely spaced, parallel, Josephson junctions. Several devices have been fabricated and different methods investigated for measuring the statistical distribution of trapped flux states. We report the results of these endeavours with emphasis on a method for suppressing I/sub c/ by applying an r.f. field to the junctions.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.919480