An Efficient Iterative Scheme for HEMP Simulation with Consideration of Self-consistency

Recent researches about the spatial distribution and statistical results of the high-altitude nuclear electromagnetic pulse (HEMP) put forwards requirements for the efficiency of the simulation. However, the simulation of HEMP with the consideration of self-consistency was complex and time-consuming including the interaction between the electrons and the electromagnetic (EM) fields. An efficient iterative scheme was proposed in this paper, the electrons and the EM fields were decoupled and simulated separately. The self-consistent effect was neglected in the first iteration and then taken into account by considering results of the EM fields in each iteration as the independent excitation field for electrons in the next iteration. The parallel computation strategy was practiced for the simulation of Compton electrons and air conductivity with the decoupled algorithm to further improve the efficiency up to tens times faster. The existence of the self-consistent effect was concluded to clearly weaken the Compton current and reduce the EM fields of HEMP.