Development and application of particle emission algorithms from cut-cell boundaries in the VORPAL EM-FDTD-PIC simulation tool

Recent advances to the electromagnetic solvers in the VORPAL FDTD-PIC simulation software have allowed us to maintain a finite-difference solution technique, while modeling conducting and dielectric boundary surfaces that cut through the grid at arbitrary angle, thus providing precise modeling of the electromagnetic volume. However, a remaining challenge is how to emit particles from these surfaces in a way that provides similar improved accuracy. We discuss our progress in cut-cell emission algorithms, and applications to practical problems.