HELMHOLTZ-ISHKOV COILS Russian patent published in 2014 - IPC H01F17/04 

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and may be used both in laboratory conditions and in processing equipment using homogeneous magnet fields of different levels. The technical result consists in increase of the magnetic field homogeneity. Helmholtz coils are placed to an external shell-type magnetic core made of the upper and lower identical cylindrical cavities for the Helmholtz coils and surveyed objects coupled by their butt ends, and axes of these cavities are compliant. Outer faces of the magnetic core are rounded with a radius equal to the radius of the Helmholtz coils. In result of the magnetic resistance reduction in a space surrounding the Helmholtz coils the level of magnetic flux density is increased in a workspace of the device. At that deformation of the magnetic field lines takes place so that the lines in the central near-axial part of the workspace are reduced relatively to the larger extent than the lines in the peripheral part of the workspace.

EFFECT: invention contributes to improvement of the magnetic field homogeneity in the device workspace.

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