Unipic: A Conformal Particle-In-Cell Code for High Power Micrwowave and Pulse Discharge

Abstract

UNIPIC is a particle-in-cell code for high power microwave device design and high voltage pulse discharge simulation[1]. It uses the explicit symplectic integrators[2] for Maxwell Equation, which can accurately solve the electromagnetic field value at the complex boundary, reduce the numerical dispersion error by more than two orders of magnitude, and greatly reduce the pseudo-Cherenkov radiation. Together with USC-FIT algorithm, the integrators could compute electromagnetic field conformally. UNIPIC uses the three-step Boris integrator[3] and cut-cell boundary processing algorithm to advance and emit charged particles conformally.