Axisymmetric correction coil system for NMR magnets

Details Axisymmetric correction coil system for NMR magnets Axisymmetric correction coil system for NMR magnets

1984-05-23

1985-03-19

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

335299, 324320, H01F 722

Patent

active

045062471

ABSTRACT:
Even and odd pairs of axisymmetric correction coils are disposed on a cylindrical form at specified longitudinal positions. The coil pairs are intended to provide correction fields for high strength magnets employed in NMR imaging applications. The locations of the coils are chosen so that each coil pair generally contributes to all significant terms in the spherical harmonic expansion representation of the axial magnetic component in the volume within the central region of the cylindrical form except that certain coil pairs are selected and designed so as to fail to produce a particular one of these spherical harmonic component terms.

REFERENCES:
patent: 3469180 (1969-09-01), Anderson
patent: 3577067 (1971-05-01), Weaver
patent: 4339718 (1982-07-01), Bull
patent: 4456881 (1984-06-01), Compton

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