Multiresolution Simulations of Photoinjectors

We report a successful implementation of a three‐dimensional wavelet‐based solver for Poisson’s equation with Dirichlet boundary conditions, optimized for use in particle‐in‐cell beam dynamics simulations. We explain how the new algorithm works and the advantages it brings to accelerator simulations. The solver is integrated into a full photoinjector‐simulation code (Impact‐T), and the code is then benchmarked by comparing its output against that of other codes (verification) and against laboratory measurements (validation). We also simulated the AES/JLab photoinjector using a suite of codes. This activity revealed certain performance limitations and their causes.