Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1989-10-25
1991-06-04
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
324318, 505844, 505846, G01R 33035, G01R 3320
Patent
active
050217399
ABSTRACT:
An RF magnetic flux measuring circuit uses a SQUID fluxmeter of which the input and output characteristics establish a periodic function, and in which a pick-up coil for picking up desired RF magnetic flux and an input coil of the SQUID fluxmeter are connected to form a closed loop which is a superconducting loop for transferring the magnetic flux to the SQUID. There is also provided an inductance adjusting device which adjusts the inductance of the superconducting loop to limit the magnetic flux that crosses the SQUID fluxmeter within a range of a single-valued function in said input and output characteristics.
REFERENCES:
patent: 3528001 (1970-09-01), Yntema
patent: 3965411 (1976-06-01), Hesterman
patent: 4864237 (1989-09-01), Hoenig
patent: 4875010 (1989-10-01), Yokosawa et al.
Hilbert et al.; "Nuclear Quadrupole . . . with a DC Superconducting Quantum Interference Device", Appl. Phys. Lett. 47(6), Sep. 15, 1985, pp. 637-637.
Kohno Hideki
Yokosawa Koichi
Hitachi , Ltd.
Strecker Gerard R.
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