Update on the Modeling of Chains of Plasma Accelerator Stages for Future Colliders*

One of the most challenging application of plasma accelerators is the development of a plasma-based collider for high-energy physics studies. Fast and accurate simulation tools are essential to study the physics toward configurations that enable the production and acceleration of very small beams with low energy spread and emittance preservation over long distances, as required for a collider. The Particle-In-Cell code WarpX is being developed by a team of the U.S. DOE Exascale Computing Project (with non-U.S. collaborators on part of the code) to enable the modeling of chains of tens of plasma accelerators on exascale supercomputers, for collider designs. We will present our latest application of the code to the modeling of up to 10 consecutive multi-GeV stages on the GPU-accelerated Summit supercomputer, together with the latest developments that made it possible.