Coil for the production of homogeneous magnetic fields

Details Coil for the production of homogeneous magnetic fields Coil for the production of homogeneous magnetic fields

1978-11-29

1980-10-28

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

335216, 324320, H01F 706, H01F 722

Patent

active

042310083

ABSTRACT:
A coil for the production of homogeneous magnetic fields; the coil sides are disposed in sets of four arranged symmetrically about a common axis to which the coil sides are parallel. There are 2n turns of the coil and the disposition of coil sides is such that the n sums, each of which is the sum of 2n turns respectively of the quantities cos 3.psi..mu./R.sup.3 .mu., cos 5.psi..mu./R.sup.5 .mu. etc to cos (2n+1).psi..mu./R.sup.2n+1 .mu. are all substantially zero on the supposition that equal currents flow through all the turns of the coil. The equality to zero need not be exact, variation of up to 10.degree. in the angles for invariant R or variation of up to 10% in the various R.mu. for invariant angles .psi..mu. being tolerable. The coil (1.ltoreq..mu..ltoreq.n) is particularly intended for use in the measurement of the properties of liquid media by determinations of nuclear resonance.

REFERENCES:
patent: 3199021 (1965-08-01), Anderson
patent: 3258657 (1966-06-01), Peuron et al.
patent: 3409852 (1968-11-01), Uhlmann et al.
patent: 4095202 (1978-06-01), Danielsson et al.
Generation of Uniform Magnetic Fields by Means of Air-Coils-Franzen--Review of Scientific Instruments, vol. 33, 1962, No. 9, pp. 933-938.
Coil Arrangements for Producing a Uniform Magnetic Field-Harris--Journal of Research of the National Bureau of Standards, vol. 13, 1934, pp. 391-401.
Nuclear Instruments and Methods, 78 (1970), pp. 181-184.

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