Equivalent circuit model for loss current in magnetically insulated transmission line

A modified formula for SCL current was established, based on particle-in-cell(PIC) simulation results and formulas for conventional space-charge-limited(SCL) current and critical magnetic insulation current. And a fast interpolation model for loss current in magnetically insulated transmission line(MITL) was presented, which refrains from solving generalized Poisson equation and can be used in equivalent circuit modeling. As verification, a long coaxial MITL was simulated with both the equivalent circuit method and the PIC method. It was found that the time histories of the load voltage agreed well with each other, which were obtained by the two methods separately. The interpolation model repeated the dynamic process of current loss and the computation efficiency of the equivalent circuit simulation was more than 3000 times higher than that of the PIC simulation.