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Exact charge conservation scheme for Particle-in-Cell simulation with an arbitrary form-factor

. Computer Physics Communications, 135 (2): 144 - 153 (2001)
DOI: 10.1016/S0010-4655(00)00228-9

Abstract

The new method of local electric current density assignment in the Particle-in-Cell code in Cartesian geometry is presented. The method is valid for an arbitrary quasi-particle form-factor assuming that quasi-particle trajectory over time step is a straight line. The method allows one to implement the PIC code without solving Poisson equation. The presented formula for the current density associated with the motion of a single quasi-particle is the unique linear combination of form-factor differences in consistency with the discrete continuity equation. The computation scheme is demonstrated in 2D and 3D.

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