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DTSTART;TZID=Europe/Stockholm:20260630T141500
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UID:submissions.pasc-conference.org_PASC26_sess142_msa128@linklings.com
SUMMARY:The Gysela-X project: Developing a Successor to GYSELA for Exascal
 e Performance and New Physics
DESCRIPTION:Kevin Obrejan and Virginie Grandgirard (CEA, IRFM); Yuuichi As
 ahi and Julien Bigot (CEA, Maison de la Simulation); Emily Bourne (EPFL); 
 Ariel De Vora and Peter Donnel (CEA, IRFM); Michael Go (Nanyang Technologi
 cal University); Alexander Hoffmann (Max Planck Institute for Plasma Physi
 cs); Abdelhadi Kara and Philipp Krah (CEA, IRFM); Etienne Malaboeuf (CINES
 ); Thomas Padioleau (CEA, Maison de la Simulation); Matthieu Protais (CEA,
  IRFM); and Pauline Vidal (Max Planck Institute for Plasma Physics)\n\nThe
  Fortran code GYSELA is one of the leading codes for global flux-driven si
 mulations of fusion plasmas. The Gysela-X project consists in the developm
 ent of a series of C++ codes, culminating in GYSELA’s successor, Gysela-X+
 +, which will feature new physics capabilities, including in particular X-
 points tokamak geometries. Written in modern C++, parallelised using MPI a
 nd Kokkos with exascale architectures in mind, it will be fully optimised 
 for current and future supercomputers, thanks to its open-source backend l
 ibrary, Gyselalib++, which provides its core kernels.\nA major milestone o
 f the project is the axisymmetric (2D-2V) code, Gysela-Axi, which serves a
 s the basis for our collaborative work on new physics (stellarator geometr
 ies, neutral physics), numerical methods (multi-patch interpolations, non-
 uniform grids), HPC tools (in-situ diagnostics, AI pipeline) and performan
 ce optimisations. We will give an overview of the Gysela-X project and its
  current progress. We will also present recent performance benchmarks for 
 Gysela-Axi and its first physics validation results using geodesic acousti
 c mode damping.\n\nDomain: Physics, Computational Methods and Applied Math
 ematics\n\nSession Chair: Eric Sonnendrücker (Max Planck Institute for Pla
 sma Physics, Technical University of Munich)\n\n
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