Adams, Mark F.Hirvijoki, EeroKnepley, Matthew G.Brown, JedIsaac, TobinMills, Richard2018-07-022018-07-022017Adams, Mark F., Hirvijoki, Eero, Knepley, Matthew G., et al.. "Landau Collision Integral Solver with Adaptive Mesh Refinement on Emerging Architectures." <i>SIAM Journal on Scientific Computing,</i> 39, no. 6 (2017) Society for Industrial and Applied Mathematics: C452-C465. https://doi.org/10.1137/17M1118828.https://hdl.handle.net/1911/102332The Landau collision integral is an accurate model for the small-angle dominated Coulomb collisions in fusion plasmas. We investigate a high order accurate, fully conservative, finite element discretization of the nonlinear multispecies Landau integral with adaptive mesh refinement using the PETSc library (ŭlwww.mcs.anl.gov/petsc). We develop algorithms and techniques to efficiently utilize emerging architectures with an approach that minimizes memory usage and movement and is suitable for vector processing. The Landau collision integral is vectorized with Intel AVX-512 intrinsics and the solver sustains as much as 22% of the theoretical peak flop rate of the Second Generation Intel Xeon Phi (``Knights Landing'') processor.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttps://doi.org/10.1137/17M1118828