Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1984-06-27
1987-04-07
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335299, 324320, H01F 722
Patent
active
046564470
ABSTRACT:
When a closed circuit is formed by joining superconducting wires with superconducting joints, the current in that circuit adjusts itself as required to maintain whatever total flux linkage the circuit had at the instant superconductivity was achieved. In particular, a closed circuit which first becomes superconducting under conditions of zero net flux linkage maintains zero net flux linkage as long as the circuit remains superconducting. By appropriately configuring a set of short-circuited superconducting coils, a field inside a volume described by the coils is kept substantially more uniform than it would be if the same volume were magnetized by the same source in the absence of the short-circuited coils. This property is used to insure that the volume within the coils exhibits improved magnetic field homogeneity.
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Garrett, MW "Thick Cylindrical Coil Systems for Strong Magnetic Fields With Field or Gradient Homogeneities of the 6th to 20th Order", Journal of Applied Physics, vol. 38, No. 6, May 1967.
Keim Thomas A.
Mayergoyz Isaak D.
Cutter Lawrence D.
Davis James C.
General Electric Company
Harris George
Snyder Marvin
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