Exascale Plasma-Accelerator Simulations with PIConGPU

* Next-generation Laser-plasma Accelerators (protons and electrons) require fast and predictive 3D particle-in-cell simulations at the exascale. * PIConGPU is performance portable & available as a single source through Alpaka. * PIConGPU scales to the largest supercomputers of the world, leveraging Alpaka for running on the latest GPUs from NVIDIA (A100) and AMD (MI100) * HIP & OpenMP 5+ backends now available on Alpaka and PIConGPU. * PIConGPU performance scales on Juwels Booster and Summit machines. Starting from typical simulation applications and requirements in laser-plasma accelerators, we present the PIConGPU software stack and current scaling results on large-scale compute clusters. We show results from the Frontier CAAR project and the JUWELS Booster early-access project.