Method of operating an electromagnetic arrangement
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United States of America Patent
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Apr 12, 1988
Grant Date -
N/A
app pub date -
Jul 20, 1987
filing date -
Aug 4, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of operating an electromagnet arrangement comprising a main electromagnet and a number of correction coils for applying correction fields to the field produced by the main electromagnet to produce a resultant desired homogeneous magnetic field in a given volume. The method comprises obtaining the least squares fit values for the correction coil currents and, if the required current in any coil lies outside a range of permissible values for that coil current, following a special procedure to find the best selection of coil currents consistent with the permissible currents in the coils.
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