CAGEN: a modern, PC based computer modeling tool for explosive MCG generators and attached loads

We describe the PC based computer program CAGEN. CAGEN models the performance of many varieties of magneto-cumulative-generators (MCG) or magnetic flux compression generators (FCG) which are energized with high explosive (HE). CAGEN models helical wound or coaxial types which have HE on the interior. Any materials and any HE types may be used. The cylindrical radius of the windings (or outer conductor) and the radius of the armature may vary with axial position. Variable winding width, thickness, and pitch can be represented, and divided windings are allowed. The MHD equations are used to advance the diffusion of the magnetic field into the conductors in order to compute resistance, melting, and contact effects. Magnetic pressure effects are included. The MCG model is treated as part of a lumped circuit which includes the priming circuit, an opening fuse switch, a transformer, peaking circuit, and several interesting load models. Several calculations of benchmark published experiments are shown. A typical problem will complete in a few seconds to a few minutes on a 133 MHz or faster machine. Graphical input, run control, and results analysis is provided by MathGraf, a CAREN CO. application.