Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1986-08-08
1989-09-05
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Magnetometers
307306, G01R 3302, H03K 338
Patent
active
048642371
ABSTRACT:
An apparatus for measuring magnetic fields which change only at an extremely low frequency contains a SQUID magnetometer which comprises a superconducting flux transformer for inductively coupling the measuring signal into a d-c SQUID sensor. With this apparatus, also quasi-static magnetic fields with frequencies far below 1 Hz should be detectable. A device for modulating the measuring signal to be coupled into the SQUID sensor is associated at least with the flux transformer, the modulation frequency of which is in a frequency range characteristic for low-noise operation of the SQUID. The modulation frequencies are generally above 1 Hz and optionally even above 1 kHz.
REFERENCES:
patent: 3184674 (1965-05-01), Garwin
patent: 4320341 (1982-03-01), Lutes
patent: 4489274 (1964-12-01), Berlincourt
patent: 4588947 (1986-05-01), Ketchen
Journal of Low Temperature Physics, vol. 51, Nos. 1/2, 1983, pp. 207-224.
SQUID, 1977, pp. 439-484.
Appl. Phys. Lett. 40, 15 Apr. 1982, pp. 736-738.
Electricity and Magnetism, B. I. Bleaney, et al., 1976, p. 187.
IEEE Trans. Magn. 19, No. 3, May 1983, pp. 461-464.
IEEE Trans. Magn. 17, No. 1, Jan. 1981, pp. 400-403.
SQUID '80, 1980, pp. 227-235.
Eisenzopf Reinhard J.
Siemens Aktiengesellschaft
Snow Walter E.
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