Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1988-03-22
1989-03-14
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
324320, H01F 500
Patent
active
048127973
ABSTRACT:
A superconducting coil assembly for a nuclear magnetic resonance imaging system has a main coil for producing a static magnetic field within a cylindrical volume. a conventional set of active correction coils are provided to spatially homogenize the magnetic field. A pair of passive compensation coils are electrically connected in series and shorted together. The compensaton coils are inductively coupled to the main coil so that the temporal decay of the current in the main coil induces current in the compensation coils. The magnetic field harmonics produced by this induced current is opposed to the magnetic field harmonics produced in the correction coils by main coil decay. The compensation coil thereby counteracts the inhomogeneity effects from the main coil current decay.
REFERENCES:
patent: 4398150 (1983-08-01), Barihoux et al.
patent: 4500860 (1985-02-01), Vermilyea
patent: 4581580 (1986-04-01), Keim
patent: 4647858 (1987-03-01), Bottomley
patent: 4656447 (1987-04-01), Keim et al.
patent: 4680551 (1987-07-01), O'Donnell et al.
patent: 4689591 (1987-08-01), McDougall
patent: 4701736 (1987-10-01), McDougall et al.
General Electric Company
Harris George
LandOfFree
Compensation coil for temporal drift of a superconducting magnet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation coil for temporal drift of a superconducting magnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation coil for temporal drift of a superconducting magnet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-896302