Apparatus for multi-channel measurement of weak magnetic fields

Details Apparatus for multi-channel measurement of weak magnetic fields Apparatus for multi-channel measurement of weak magnetic fields

1988-10-19

1991-04-30

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

29599, G01R 3302, H01L 3924

Patent

active

050121901

ABSTRACT:
Apparatus for multi-channel measurement of weak magnetic fields having assigned to each channel an assembly, which is arranged on a base carrier (30) and includes a DC-SQUID (6, 27), a gradiometer coil (8, 12, 15, 16, 37), a coupling-in coil (9, 19, 38), superconductive connecting leads (10, 17, 18, 41), and a modulation coil (7, 26). The gradiometer coil, the coupling-in coil and the SQUID are made from thin-film structures. An evaluation element (11) serves to evaluate the signals generated in each channel by the SQUIDS. A separate plate (29) is provided for each channel, on which the SQUID and the modulation coil are deposited. The assembly of gradiometer coil, connecting leads and coupling-in coil provided for each channel is deposited on a separate gradiometer carrier (12, 32). A plate is arranged on a gradiometer carrier, and the individual gradiometer carriers are attached to the base carrier.

REFERENCES:
patent: 3805123 (1974-04-01), Rieger
patent: 4694567 (1987-09-01), Daalmans
patent: 4749946 (1988-06-01), Hoenig
patent: 4771239 (1988-09-01), Hoenig

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