Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1992-05-13
1993-06-08
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
505702, 505846, G01R 33035
Patent
active
052182975
ABSTRACT:
Since a superconducting quantum interference device (SQUID) using a high temperature superconductor operates at the liquid nitrogen temperature 77 K, which is higher than the liquid helium temperature 4.2 K, it is necessary that the value of signal voltages is at a level, which is sufficiently higher than the thermal noise level. The superconducting inductance L should be decreased with increasing current flowing through Josephson junctions in the SQUID. The superconducting inductance can be reduced by various methods such as reduction in the size of the aperture of the superconducting inductance, parallel connection of superconducting inductances, utilization of a superconducting ground plane, etc., in order to realize a SQUID, which can be use in a wide application field at the liquid nitrogen temperature 77 K.
REFERENCES:
patent: 3528005 (1970-09-01), Morse et al.
patent: 4064029 (1977-12-01), Wu et al.
patent: 4224630 (1980-09-01), Kroger
patent: 4588947 (1986-05-01), Ketchen
patent: 4801882 (1989-01-01), Daalmans
patent: 4804915 (1989-02-01), Hoenig
Wu et al., "Superconductivity at 93 K in a New Mixed-Phase Y-Ba-Cu-O Compound System at Ambient Pressure", Physical Review Letters, vol. 58, No. 9, Mar. 2, 1987, pp. 908-910.
Fisher et al., "Superconductor Research Pace Quickens", Ceramic Bulletin, vol. 66, No. 7, 1987, pp. 1087-1092.
Kaneto et al., "The Application of Superconducting Ceramics . . . ", Journal of Applied Physics, vol. 26, No. 11, Nov., 1987, pp. L1842-L1844.
Robbes et al., "Dispositif magnetometrique supraconducteur a sonde ceramique YBaCuO", C. R. Acad. Sci. Paris, t. 306, Serie 11, 1988, pp. 121-124.
Rabinowitz, "Superconductivity and Electric Power", Forum for Applied Research and Public Policy, Spring 1988, pp. 55-62.
Rollins et al., "Magnetic field profiles in type-II superconductors with pinning using a new ac technique", Journal of Applied Physics, vol. 45, No. 12, Dec. 1974, pp. 5392-5398.
IEEE Transactions on Magnetics, vol. Mag-23 No. 2 Mar. 1987 pp. 1650-1657, IEEE, NY, US: M. B. Ketchen "Integrated thin-film dc squid sensors".
R. H. Koch, C. P. Umbach, G. J. Clark, P. Chaudhari, R. B. Laibowitz Quantum Interference Devices Made From Superconducting Oxide Thin Films May 22, 1987; pp. 200-202.
Nakane Hideaki
Tarutani Yoshinobu
Edmonds Warren S.
Hitachi , Ltd.
Strecker Gerard R.
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