KPP-3 Artifact for WarpX <> Clover-SLATE: RZ Simulation on Frontier

This documents a run of WarpX in the quasi-cylindrical "RZ" geometry with the Pseudo Spectral Analytical Time Domain (PSATD) field solver. The simulation was run on Frontier (OLCF). ECP CLOVER project SLATE provides WarpX with the GPU capable C++ libraries BLAS++ and LAPACK++, which are used for geometric transfer matrix calculations in RZ. Furthermore, using BLAS++, manually-written, node-local linear algebra operations were replaced for significant speedups, e.g., up to 5x faster on MI250X for a Hankel transformation. WarpX documentation: https://warpx.readthedocs.io