Abstract
This paper describes a program for the calculation of axisymmetric magnetic fields using integral expressions. Fields due to currents are calculated by splitting up windings into current carrying rings. The fields of these rings are evaluated off-axis by the well known representation with complete elliptic integrals [1]. Iron pieces with arbitrary cross section can be taken into account by assuming infinite permeability and by representing the magnetization by Ampere's currents on the surface of these pieces. To account for the mutual influence of these surface currents, an iterative procedure with fast convergence is applied. This allows an arbitrary fine discretization of surface currents along the iron surfaces, which is free from any meshing and uses only modest computer memory. The method therefore is well suited for PCs and workstations.
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More From: Nuclear Inst. and Methods in Physics Research, B
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