Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1983-04-04
1986-01-28
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
307306, G01R 3302, H03K 338
Patent
active
045674388
ABSTRACT:
A type of Superconducting Quantum Interference Device (SQUID) requires that relatively large, circular, toroidally wound wire coils within a first cavity of a superconducting canister should be inductively coupled to a relatively small SQUID created as an annular ring plus Josephson junctions upon a substrate within a second cavity of the superconducting canister. The required inductive coupling is through a dielectric filled cavity called a coupling cavity which is conical in the shape of a dunce's cap. The conically shaped coupling cavity within the superconducting canister minimizes the parasitic stray inductance which is coupled to the SQUID, and thusly improves the noise performance of the SQUID.
REFERENCES:
patent: 4403189 (1983-09-01), Simmonds
Fleming David L.
Gershenson Meir
Long Dennis D.
Sweeny Mark F.
Bowen Glenn W.
Fuess William C.
Snow Walter E.
Sperry Corporation
Strecker Gerard R.
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