Computer simulation of multi-gigawatt magnetic compression lines

Magnetic compression lines (MCL) are novel solid-state devices for multi-gigawatt sub-nanosecond and picosecond pulse amplification. Their operation is based on the interaction of magnetic field created by a powerful nanosecond or sub-nanosecond pulse with the magnetization vector in a ferrite medium. In this study a numerical model of an MCL was created, based on Maxwell’s equations and Landau-Lifshitz-Gilbert equation for magnetization dynamics. The equation system is solved using COMSOL Multiphysics simulation software. The model shows good agreement with the experimental data. Using the created model, the process of power amplification in MCL was analyzed in terms of magnetic field and magnetization vectors. Based on this analysis, the mechanism of unipolar pulse amplification has been proposed.