Method and device for generating a magnetic field of a potential with electric current components distributed according to a derivative of the potential

摘要

A device for producing a 2N-pole magnetic field in a rhombic or a rectangular prismal space comprises 2N sets of conductors extended axially of the space along a yoke inside surface defining the space. Electric currents are caused to flow through the conductors with a current density distribution given by -d&phgr;/ds where &phgr; and ds represent a potential for the field and a differential line element directed perpendicularly along the yoke inside surface of the prism axis. The current density distribution is generalized, for production of a general static magnetic field, to current components perpendicular to a plane intersecting the yoke inside surface at a plane curve, when ds represents a differential line element tangential to the curve.