Superconducting magnet correction coil adjustment mechanism

Details Superconducting magnet correction coil adjustment mechanism Superconducting magnet correction coil adjustment mechanism

1998-12-18

2000-01-11

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

335301, 324318, H01F 100

Patent

active

060140690

ABSTRACT:
A correction coil current adjustment circuit for a superconducting magnet to selectively switch various coils in circuit with a power source to provide the desired superconducting current flow and magnetic field homogeneity for magnetic resonance imaging eliminating the need for some of the mechanical leads which extend from the exterior of the magnet to the interior of the cryogen vessel minimizing thermal leak paths and including simplified switching of the various main and correction magnet coils to provide the desired current flow. Inductive coupling from outside the magnet to induce correction coil current flow eliminates additional mechanical leads.

REFERENCES:
patent: 4173775 (1979-11-01), Kneip, Jr.
patent: 4535291 (1985-08-01), Lee et al.
patent: 4737717 (1988-04-01), Petro
patent: 4812797 (1989-03-01), Jayakumar
patent: 5539367 (1996-07-01), Xu et al.
patent: 5545997 (1996-08-01), Westphal et al.

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