Three dimensional forces and energy computation software package `FEMAN´ and its applications

The authors present a numerical computer program, called FEMAN, which may be successfully used to calculate the magnetic field, energy, forces, and coupling coefficients in iron-free media, due to a collection of rectangular busbars or annular arc-shaped conductors, in which flows a current of constant density, arbitrarily oriented in space. Systems of this type can well simulate electromagnetic launchers, flux compression, and homopolar generators. The program is based on the integral formulation of the Biot-Savart law evaluated in closed form for conductors having elementary shape, and is built up to permit the successive addition of routines that allow consideration of other conductor shapes. The software package has been checked against results found in the literature