Warp-X: a new exascale computing platform for plasma simulations*

Plasmas involve very complex phenomena, often across large ranges of space and time scales, driving the development of computer simulation codes with novel algorithms that run on the largest available supercomputers. As part of U.S. DOE’s Exascale Computing Project, a team from LBNL, SLAC and LLNL is developing a new powerful plasma accelerator simulation tool. The new software will harness the power of future exascale supercomputers for the exploration of outstanding questions in the physics of acceleration and transport of particle beams in chains of plasma channels for the realization of compact and affordable high-energy physics colliders, many spinoff applications of plasma accelerators and other plasma applications. We will present the various components of the codes such as the new Particle-In-Cell Scalable Application Resource (PICSAR) and the redesigned adaptive mesh refinement library AMReX, combined with redesigned elements of the Warp code, in the new WarpX software. The status, examples of applications to plasma acceleration of electrons or ions and to plasma mirrors, and future developments, will be discussed.