Three-dimensional parallelized fully-electromagnetic particle simulation code UNIPIC-3D

This paper introduces a self-developed, three-dimensional parallelized fully-electromagnetic particle simulation code UNIPIC-3D. In the code, the electromagnetic fields are updated using the second-order, finite-difference time-domain (FDTD) method, and the particles are moved using the relativistic Newton-Lorentz force equation. The code can be used to simulate the high-power microwave (HPM) devices, such as the relativistic backward wave oscillator, coaxial vircator, and magnetically insulated line oscillator (MILO), etc. Users can use the graphical user’s interface to create complex geometric structures of the simulated HPM devices, which can be automatically meshed by UNIPIC-3D code. The code has a powerful post-processor which can display the electric field, magnetic field, current,