04658229 is referenced by 15 patents and cites 11 patents.

A magnet system for providing a substantially homogeneous magnetic field in a region. The magnet system includes a main coil and a pair of correcting coils with the main coil generating a magnetic field in a zone including the region. The correcting coils are at first and second locations in the zone and are connected to one another so that a magnetic field generated by the main coil will induce currents in the correcting coils which oppose one another. The correcting coils are constructed so that there will be no resultant current in them when there is generated substantially the same field strength of both of the first and second locations. Thus, the generation of differing magnetic field strengths at the respective locations effects generation of a resultant current in the correcting coil causing strengthening of the magnetic field at the location having the lesser magnetic field strength and weakening of the magnetic field at the other location, making the net field relatively homogeneous.

Title
Magnet system providing a region of substantially homogeneous field strength
Application Number
6/733232
Publication Number
4658229
Application Date
May 10, 1985
Publication Date
April 14, 1987
Inventor
John R Purcell
San Diego
CA, US
Yen Hwa L Hsu
Solana Beach
CA, US
Wilkie Y Chen
San Diego
CA, US
Agent
Fitch Even Tabin & Flannery
Assignee
GA Technologies
CA, US
IPC
H01F 7/22
View Original Source