Journal
PHYSICS OF PLASMAS
Volume 28, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0028512
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Funding
- U.S. Department of Energy's Office of Science [17-SC-20-SC]
- National Nuclear Security Administration [17-SC-20-SC]
- U.S. Department of Energy by Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
- SLAC National Accelerator Laboratory [AC02-76SF00515]
- Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility [DE-AC05-00OR22725]
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WarpX is a fully electromagnetic particle-in-cell code developed by the U.S. DOE Exascale Computing Project to model chains of plasma accelerator stages on exascale supercomputers. It utilizes the latest algorithmic advances and GPU architectures for simulations.
The fully electromagnetic particle-in-cell code WarpX is being developed by a team of the U.S. DOE Exascale Computing Project (with additional non-U.S. collaborators on part of the code) to enable the modeling of chains of tens to hundreds of plasma accelerator stages on exascale supercomputers, for future collider designs. The code is combining the latest algorithmic advances (e.g., Lorentz boosted frame and pseudo-spectral Maxwell solvers) with mesh refinement and runs on the latest computer processing unit and graphical processing unit (GPU) architectures. In this paper, we summarize the strategy that was adopted to port WarpX to GPUs, report on the weak parallel scaling of the pseudo-spectral electromagnetic solver, and then present solutions for decreasing the time spent in data exchanges from guard regions between subdomains. In Sec. IV, we demonstrate the simulations of a chain of three consecutive multi-GeV laser-driven plasma accelerator stages.
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